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/** Copyright (c) 2009 Open Information Security Foundation.
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* \author Anoop Saldanha <poonaatsoc@gmail.com>
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*/
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#include "suricata-common.h"
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#include "detect.h"
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#include "detect-parse.h"
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#include "detect-engine.h"
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#include "detect-engine-mpm.h"
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#include "detect-dce-iface.h"
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#include "flow.h"
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#include "flow-var.h"
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#include "app-layer.h"
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#include "app-layer-dcerpc.h"
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#include "queue.h"
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#include "stream-tcp-reassemble.h"
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#include "util-debug.h"
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#include "util-unittest.h"
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#include "stream-tcp.h"
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#define DETECT_DCE_IFACE_PCRE_PARSE_ARGS "^\\s*([0-9a-zA-Z]{8}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{12})(?:\\s*,(<|>|=|!)([0-9]{1,5}))?(?:\\s*,(any_frag))?\\s*$"
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static pcre *parse_regex = NULL;
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static pcre_extra *parse_regex_study = NULL;
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int DetectDceIfaceMatch(ThreadVars *, DetectEngineThreadCtx *, Flow *, uint8_t,
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void *, Signature *, SigMatch *);
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int DetectDceIfaceSetup(DetectEngineCtx *, Signature *s, SigMatch *m, char *arg);
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void DetectDceIfaceFree(void *);
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/**
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* \brief Registers the keyword handlers for the "dce_iface" keyword.
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*/
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void DetectDceIfaceRegister(void)
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{
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const char *eb;
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int eo;
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int opts = 0;
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sigmatch_table[DETECT_DCE_IFACE].name = "dce_iface";
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sigmatch_table[DETECT_DCE_IFACE].alproto = ALPROTO_DCERPC;
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sigmatch_table[DETECT_DCE_IFACE].Match = NULL;
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sigmatch_table[DETECT_DCE_IFACE].AppLayerMatch = DetectDceIfaceMatch;
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sigmatch_table[DETECT_DCE_IFACE].Setup = DetectDceIfaceSetup;
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sigmatch_table[DETECT_DCE_IFACE].Free = DetectDceIfaceFree;
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sigmatch_table[DETECT_DCE_IFACE].RegisterTests = DetectDceIfaceRegisterTests;
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parse_regex = pcre_compile(DETECT_DCE_IFACE_PCRE_PARSE_ARGS, opts, &eb,
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&eo, NULL);
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if (parse_regex == NULL) {
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SCLogDebug("pcre compile of \"%s\" failed at offset %" PRId32 ": %s",
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DETECT_DCE_IFACE_PCRE_PARSE_ARGS, eo, eb);
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goto error;
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}
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parse_regex_study = pcre_study(parse_regex, 0, &eb);
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if (eb != NULL) {
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SCLogDebug("pcre study failed: %s", eb);
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goto error;
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}
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return;
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error:
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/* we need to handle error?! */
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return;
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}
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/**
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* \internal
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* \brief Parses the argument sent along with the "dce_iface" keyword.
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*
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* \param arg Pointer to the string containing the argument to be parsed.
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*
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* \retval did Pointer to a DetectDceIfaceData instance that holds the data
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* from the parsed arg.
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*/
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static inline DetectDceIfaceData *DetectDceIfaceArgParse(const char *arg)
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{
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DetectDceIfaceData *did = NULL;
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#define MAX_SUBSTRINGS 30
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int ret = 0, res = 0;
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int ov[MAX_SUBSTRINGS];
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uint8_t hex_value;
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const char *pcre_sub_str = NULL;
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int i = 0, j = 0;
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int len = 0;
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char temp_str[3];
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int version;
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ret = pcre_exec(parse_regex, parse_regex_study, arg, strlen(arg), 0, 0, ov,
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MAX_SUBSTRINGS);
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if (ret < 2) {
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SCLogError(SC_ERR_PCRE_MATCH, "pcre_exec parse error, ret %" PRId32 ", string %s", ret, arg);
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goto error;
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}
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if ( (did = malloc(sizeof(DetectDceIfaceData))) == NULL) {
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SCLogError(SC_ERR_MEM_ALLOC, "Error allocating memory");
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goto error;
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}
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memset(did, 0, sizeof(DetectDceIfaceData));
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/* retrieve the iface uuid string. iface uuid is a compulsion in the keyword */
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res = pcre_get_substring(arg, ov, MAX_SUBSTRINGS, 1, &pcre_sub_str);
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if (res < 0) {
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SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
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goto error;
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}
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/* parse the iface uuid string */
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len = strlen(pcre_sub_str);
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j = 0;
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temp_str[2] = '\0';
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for (i = 0; i < len; ) {
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if (pcre_sub_str[i] == '-') {
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i++;
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continue;
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}
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temp_str[0] = pcre_sub_str[i];
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temp_str[1] = pcre_sub_str[i + 1];
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hex_value = strtol(temp_str, NULL, 16);
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did->uuid[j] = hex_value;
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i += 2;
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j++;
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}
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/* if the regex has 3 or 5, any_frag option is present in the signature */
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if (ret == 3 || ret == 5)
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did->any_frag = 1;
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/* if the regex has 4 or 5, version/operator is present in the signature */
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if (ret == 4 || ret == 5) {
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/* first handle the version number, so that we can do some additional
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* validations of the version number, wrt. the operator */
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res = pcre_get_substring(arg, ov, MAX_SUBSTRINGS, 3, &pcre_sub_str);
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if (res < 0) {
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SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
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goto error;
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}
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version = atoi(pcre_sub_str);
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if (version > UINT16_MAX) {
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SCLogError(SC_ERR_INVALID_SIGNATURE, "DCE_IFACE interface version "
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"invalid: %d\n", version);
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goto error;
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}
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did->version = version;
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/* free the substring */
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pcre_free_substring(pcre_sub_str);
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/* now let us handle the operator supplied with the version number */
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res = pcre_get_substring(arg, ov, MAX_SUBSTRINGS, 2, &pcre_sub_str);
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if (res < 0) {
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SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
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goto error;
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}
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switch (pcre_sub_str[0]) {
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case '<':
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if (version == 0) {
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SCLogError(SC_ERR_INVALID_SIGNATURE, "DCE_IFACE interface "
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"version invalid: %d. Version can't be less"
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"than 0, with \"<\" operator", version);
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goto error;
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}
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did->op = DETECT_DCE_IFACE_OP_LT;
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break;
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case '>':
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if (version == UINT16_MAX) {
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SCLogError(SC_ERR_INVALID_SIGNATURE, "DCE_IFACE interface "
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"version invalid: %d. Version can't be greater"
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"than %d, with \">\" operator", version,
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UINT16_MAX);
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goto error;
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}
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did->op = DETECT_DCE_IFACE_OP_GT;
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break;
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case '=':
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did->op = DETECT_DCE_IFACE_OP_EQ;
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break;
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case '!':
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did->op = DETECT_DCE_IFACE_OP_NE;
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break;
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}
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/* free the substring */
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pcre_free_substring(pcre_sub_str);
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}
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return did;
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error:
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if (did != NULL)
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free(did);
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return NULL;
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}
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/**
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* \internal
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* \brief Internal function that compares the dce interface version for this
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* flow, to the signature's interface version specified using the
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* dce_iface keyword.
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*
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* \param version The dce interface version for this flow.
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* \param dce_data Pointer to the Signature's dce_iface keyword
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* state(DetectDceIfaceData *).
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*/
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static inline int DetectDceIfaceMatchIfaceVersion(uint16_t version,
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DetectDceIfaceData *dce_data)
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{
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switch (dce_data->op) {
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case DETECT_DCE_IFACE_OP_LT:
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return (version < dce_data->version);
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case DETECT_DCE_IFACE_OP_GT:
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return (version > dce_data->version);
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case DETECT_DCE_IFACE_OP_EQ:
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return (version == dce_data->version);
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case DETECT_DCE_IFACE_OP_NE:
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return (version != dce_data->version);
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default:
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return 1;
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}
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}
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/**
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* \brief App layer match function for the "dce_iface" keyword.
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*
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* \param t Pointer to the ThreadVars instance.
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* \param det_ctx Pointer to the DetectEngineThreadCtx.
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* \param f Pointer to the flow.
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* \param flags Pointer to the flags indicating the flow direction.
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* \param state Pointer to the app layer state data.
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* \param s Pointer to the Signature instance.
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* \param m Pointer to the SigMatch.
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*
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* \retval 1 On Match.
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* \retval 0 On no match.
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*/
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int DetectDceIfaceMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx, Flow *f,
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uint8_t flags, void *state, Signature *s, SigMatch *m)
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{
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int ret = 1;
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struct uuid_entry *item = NULL;
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int i = 0;
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DetectDceIfaceData *dce_data = (DetectDceIfaceData *)m->ctx;
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DCERPCState *dcerpc_state = (DCERPCState *)state;
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if (dcerpc_state == NULL) {
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SCLogDebug("No DCERPCState for the flow");
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return 0;
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}
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SCMutexLock(&f->m);
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/* if any_frag is not enabled, we need to match only against the first
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* fragment */
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if (!dce_data->any_frag &&
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!(dcerpc_state->dcerpc.dcerpchdr.pfc_flags & PFC_FIRST_FRAG)) {
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/* any_frag has not been set, and apparently it's not the first fragment */
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ret = 0;
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goto end;
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}
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TAILQ_FOREACH(item, &dcerpc_state->dcerpc.dcerpcbindbindack.uuid_list, next) {
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ret = 1;
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/* if the uuid has been rejected(item->result == 1), we skip to the
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* next uuid */
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if (item->result == 1)
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continue;
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/* check the interface uuid */
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for (i = 0; i < 16; i++) {
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if (dce_data->uuid[i] != item->uuid[i]) {
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ret = 0;
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break;
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}
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}
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/* check the interface version */
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if (dce_data->op != DETECT_DCE_IFACE_OP_NONE &&
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!DetectDceIfaceMatchIfaceVersion(item->version, dce_data)) {
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ret &= 0;
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}
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/* we have a match. Time to leave with a match */
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if (ret == 1)
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goto end;
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}
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end:
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SCMutexUnlock(&f->m);
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return ret;
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}
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/**
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* \brief Creates a SigMatch for the "dce_iface" keyword being sent as argument,
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* and appends it to the Signature(s).
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*
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* \param de_ctx Pointer to the detection engine context.
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* \param s Pointer to signature for the current Signature being parsed
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* from the rules.
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* \param m Pointer to the head of the SigMatchs for the current rule
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* being parsed.
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* \param arg Pointer to the string holding the keyword value.
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*
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* \retval 0 on success, -1 on failure.
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*/
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int DetectDceIfaceSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
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char *arg)
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{
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DetectDceIfaceData *did = NULL;
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SigMatch *sm = NULL;
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did = DetectDceIfaceArgParse(arg);
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if (did == NULL) {
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SCLogError(SC_ERR_INVALID_SIGNATURE, "Error parsing dec_iface option in "
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"signature");
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goto error;
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}
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sm = SigMatchAlloc();
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if (sm == NULL)
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goto error;
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sm->type = DETECT_DCE_IFACE;
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sm->ctx = (void *)did;
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SigMatchAppend(s, m, sm);
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return 0;
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error:
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DetectDceIfaceFree(did);
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if (sm != NULL)
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free(sm);
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return -1;
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}
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void DetectDceIfaceFree(void *ptr)
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{
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free(ptr);
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return;
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}
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|
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/************************************Unittests*********************************/
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#ifdef UNITTESTS
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static int DetectDceIfaceTestParse01(void)
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{
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|
|
Signature *s = SigAlloc();
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int result = 0;
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|
|
DetectDceIfaceData *did = NULL;
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|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
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|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
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|
|
SigMatch *temp = NULL;
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|
|
int i = 0;
|
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|
|
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|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 0);
|
|
|
|
result &= (did->op == 0);
|
|
|
|
result &= (did->any_frag == 0);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse02(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,>1") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 1);
|
|
|
|
result &= (did->op == DETECT_DCE_IFACE_OP_GT);
|
|
|
|
result &= (did->any_frag == 0);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse03(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,<10") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 10);
|
|
|
|
result &= (did->op == DETECT_DCE_IFACE_OP_LT);
|
|
|
|
result &= (did->any_frag == 0);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse04(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,!10") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 10);
|
|
|
|
result &= (did->op == DETECT_DCE_IFACE_OP_NE);
|
|
|
|
result &= (did->any_frag == 0);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse05(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,=10") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 10);
|
|
|
|
result &= (did->op == DETECT_DCE_IFACE_OP_EQ);
|
|
|
|
result &= (did->any_frag == 0);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse06(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,any_frag") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 0);
|
|
|
|
result &= (did->op == 0);
|
|
|
|
result &= (did->any_frag == 1);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse07(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,>1,any_frag") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 1);
|
|
|
|
result &= (did->op == DETECT_DCE_IFACE_OP_GT);
|
|
|
|
result &= (did->any_frag == 1);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse08(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,<1,any_frag") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 1);
|
|
|
|
result &= (did->op == DETECT_DCE_IFACE_OP_LT);
|
|
|
|
result &= (did->any_frag == 1);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse09(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,=1,any_frag") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 1);
|
|
|
|
result &= (did->op == DETECT_DCE_IFACE_OP_EQ);
|
|
|
|
result &= (did->any_frag == 1);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse10(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 0;
|
|
|
|
DetectDceIfaceData *did = NULL;
|
|
|
|
uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34,
|
|
|
|
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC};
|
|
|
|
SigMatch *temp = NULL;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
result = (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,!1,any_frag") == 0);
|
|
|
|
|
|
|
|
if (s->match != NULL) {
|
|
|
|
temp = s->match;
|
|
|
|
did = temp->ctx;
|
|
|
|
result &= 1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (did->uuid[i] != test_uuid[i]) {
|
|
|
|
result = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
result &= (did->version == 1);
|
|
|
|
result &= (did->op == DETECT_DCE_IFACE_OP_NE);
|
|
|
|
result &= (did->any_frag == 1);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectDceIfaceTestParse11(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 1;
|
|
|
|
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,>1,ay_frag") == -1);
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-12345679ABC,>1,any_frag") == -1);
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-134-123456789ABC,>1,any_frag") == -1);
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "12345678-123-124-1234-123456789ABC,>1,any_frag") == -1);
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "1234568-1234-1234-1234-123456789ABC,>1,any_frag") == -1);
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,>65536,any_frag") == -1);
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,>=1,any_frag") == -1);
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,<0,any_frag") == -1);
|
|
|
|
result &= (DetectDceIfaceSetup(NULL, s, NULL, "12345678-1234-1234-1234-123456789ABC,>65535,any_frag") == -1);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test Test a valid dce_iface entry for a bind and bind_ack
|
|
|
|
*/
|
|
|
|
static int DetectDceIfaceTestParse12(void)
|
|
|
|
{
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
ThreadVars th_v;
|
|
|
|
Packet p;
|
|
|
|
Flow f;
|
|
|
|
TcpSession ssn;
|
|
|
|
DetectEngineThreadCtx *det_ctx = NULL;
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
DCERPCState *dcerpc_state = NULL;
|
|
|
|
int r = 0;
|
|
|
|
|
|
|
|
uint8_t dcerpc_bind[] = {
|
|
|
|
0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x48, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0xb8, 0x10, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
|
|
|
|
0x6a, 0x28, 0x19, 0x39, 0x0c, 0xb1, 0xd0, 0x11,
|
|
|
|
0x9b, 0xa8, 0x00, 0xc0, 0x4f, 0xd9, 0x2e, 0xf5,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a,
|
|
|
|
0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00,
|
|
|
|
0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_bindack[] = {
|
|
|
|
0x05, 0x00, 0x0c, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x44, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0xb8, 0x10, 0xb8, 0x10, 0x26, 0x3d, 0x00, 0x00,
|
|
|
|
0x0c, 0x00, 0x5c, 0x50, 0x49, 0x50, 0x45, 0x5c,
|
|
|
|
0x6c, 0x73, 0x61, 0x73, 0x73, 0x00, 0x00, 0x00,
|
|
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11,
|
|
|
|
0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60,
|
|
|
|
0x02, 0x00, 0x00, 0x00
|
|
|
|
};
|
|
|
|
|
|
|
|
uint32_t dcerpc_bind_len = sizeof(dcerpc_bind);
|
|
|
|
uint32_t dcerpc_bindack_len = sizeof(dcerpc_bindack);
|
|
|
|
|
|
|
|
memset(&th_v, 0, sizeof(th_v));
|
|
|
|
memset(&p, 0, sizeof(p));
|
|
|
|
memset(&f, 0, sizeof(f));
|
|
|
|
memset(&ssn, 0, sizeof(ssn));
|
|
|
|
|
|
|
|
p.src.family = AF_INET;
|
|
|
|
p.dst.family = AF_INET;
|
|
|
|
p.payload = NULL;
|
|
|
|
p.payload_len = 0;
|
|
|
|
p.proto = IPPROTO_TCP;
|
|
|
|
|
|
|
|
f.protoctx = (void *)&ssn;
|
|
|
|
p.flow = &f;
|
|
|
|
p.flowflags |= FLOW_PKT_TOSERVER;
|
|
|
|
ssn.alproto = ALPROTO_DCERPC;
|
|
|
|
|
|
|
|
StreamTcpInitConfig(TRUE);
|
|
|
|
StreamL7DataPtrInit(&ssn);
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
|
|
|
|
s = de_ctx->sig_list = SigInit(de_ctx,
|
|
|
|
"alert tcp any any -> any any "
|
|
|
|
"(msg:\"DCERPC\"; "
|
|
|
|
"dce_iface:3919286a-b10c-11d0-9ba8-00c04fd92ef5,=0,any_frag; "
|
|
|
|
"sid:1;)");
|
|
|
|
if (s == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
SigGroupBuild(de_ctx);
|
|
|
|
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
|
|
|
|
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START,
|
|
|
|
dcerpc_bind, dcerpc_bind_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
dcerpc_state = ssn.aldata[AlpGetStateIdx(ALPROTO_DCERPC)];
|
|
|
|
if (dcerpc_state == NULL) {
|
|
|
|
SCLogDebug("no dcerpc state: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack,
|
|
|
|
dcerpc_bindack_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
|
|
|
|
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
StreamL7DataPtrFree(&ssn);
|
|
|
|
StreamTcpFreeConfig(TRUE);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test Test a valid dce_iface entry with a bind, bind_ack and 3 request/responses.
|
|
|
|
*/
|
|
|
|
static int DetectDceIfaceTestParse13(void)
|
|
|
|
{
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
ThreadVars th_v;
|
|
|
|
Packet p;
|
|
|
|
Flow f;
|
|
|
|
TcpSession ssn;
|
|
|
|
DetectEngineThreadCtx *det_ctx = NULL;
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
DCERPCState *dcerpc_state = NULL;
|
|
|
|
int r = 0;
|
|
|
|
|
|
|
|
uint8_t dcerpc_bind[] = {
|
|
|
|
0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x48, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0xb8, 0x10, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
|
|
|
|
0x01, 0xd0, 0x8c, 0x33, 0x44, 0x22, 0xf1, 0x31,
|
|
|
|
0xaa, 0xaa, 0x90, 0x00, 0x38, 0x00, 0x10, 0x03,
|
|
|
|
0x01, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a,
|
|
|
|
0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00,
|
|
|
|
0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_bindack[] = {
|
|
|
|
0x05, 0x00, 0x0c, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x44, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0xb8, 0x10, 0xb8, 0x10, 0x65, 0x8e, 0x00, 0x00,
|
|
|
|
0x0d, 0x00, 0x5c, 0x50, 0x49, 0x50, 0x45, 0x5c,
|
|
|
|
0x77, 0x69, 0x6e, 0x72, 0x65, 0x67, 0x00, 0x6d,
|
|
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11,
|
|
|
|
0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60,
|
|
|
|
0x02, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_request1[] = {
|
|
|
|
0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x24, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00,
|
|
|
|
0x2c, 0xfd, 0xb5, 0x00, 0x40, 0xaa, 0x01, 0x00,
|
|
|
|
0x00, 0x00, 0x00, 0x02,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_response1[] = {
|
|
|
|
0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x30, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0xf6, 0x72, 0x28, 0x9c,
|
|
|
|
0xf0, 0x57, 0xd8, 0x11, 0xb0, 0x05, 0x00, 0x0c,
|
|
|
|
0x29, 0x87, 0xea, 0xe9, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_request2[] = {
|
|
|
|
0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0xa4, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
|
|
|
|
0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0xf6, 0x72, 0x28, 0x9c,
|
|
|
|
0xf0, 0x57, 0xd8, 0x11, 0xb0, 0x05, 0x00, 0x0c,
|
|
|
|
0x29, 0x87, 0xea, 0xe9, 0x5c, 0x00, 0x5c, 0x00,
|
|
|
|
0xa8, 0xb9, 0x14, 0x00, 0x2e, 0x00, 0x00, 0x00,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x2e, 0x00, 0x00, 0x00,
|
|
|
|
0x53, 0x00, 0x4f, 0x00, 0x46, 0x00, 0x54, 0x00,
|
|
|
|
0x57, 0x00, 0x41, 0x00, 0x52, 0x00, 0x45, 0x00,
|
|
|
|
0x5c, 0x00, 0x4d, 0x00, 0x69, 0x00, 0x63, 0x00,
|
|
|
|
0x72, 0x00, 0x6f, 0x00, 0x73, 0x00, 0x6f, 0x00,
|
|
|
|
0x66, 0x00, 0x74, 0x00, 0x5c, 0x00, 0x57, 0x00,
|
|
|
|
0x69, 0x00, 0x6e, 0x00, 0x64, 0x00, 0x6f, 0x00,
|
|
|
|
0x77, 0x00, 0x73, 0x00, 0x5c, 0x00, 0x43, 0x00,
|
|
|
|
0x75, 0x00, 0x72, 0x00, 0x72, 0x00, 0x65, 0x00,
|
|
|
|
0x6e, 0x00, 0x74, 0x00, 0x56, 0x00, 0x65, 0x00,
|
|
|
|
0x72, 0x00, 0x73, 0x00, 0x69, 0x00, 0x6f, 0x00,
|
|
|
|
0x6e, 0x00, 0x5c, 0x00, 0x52, 0x00, 0x75, 0x00,
|
|
|
|
0x6e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x03, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_response2[] = {
|
|
|
|
0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x30, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
|
|
|
|
0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0xf7, 0x72, 0x28, 0x9c,
|
|
|
|
0xf0, 0x57, 0xd8, 0x11, 0xb0, 0x05, 0x00, 0x0c,
|
|
|
|
0x29, 0x87, 0xea, 0xe9, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_request3[] = {
|
|
|
|
0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x70, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
|
|
|
|
0x58, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0x00,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0xf7, 0x72, 0x28, 0x9c,
|
|
|
|
0xf0, 0x57, 0xd8, 0x11, 0xb0, 0x05, 0x00, 0x0c,
|
|
|
|
0x29, 0x87, 0xea, 0xe9, 0x0c, 0x00, 0x0c, 0x00,
|
|
|
|
0x98, 0xda, 0x14, 0x00, 0x06, 0x00, 0x00, 0x00,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00,
|
|
|
|
0x4f, 0x00, 0x73, 0x00, 0x61, 0x00, 0x33, 0x00,
|
|
|
|
0x32, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0x18, 0x00, 0x00, 0x00, 0x4e, 0x00, 0x54, 0x00,
|
|
|
|
0x4f, 0x00, 0x53, 0x00, 0x41, 0x00, 0x33, 0x00,
|
|
|
|
0x32, 0x00, 0x2e, 0x00, 0x45, 0x00, 0x58, 0x00,
|
|
|
|
0x45, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_response3[] = {
|
|
|
|
0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x1c, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
|
|
|
|
0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x00, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint32_t dcerpc_bind_len = sizeof(dcerpc_bind);
|
|
|
|
uint32_t dcerpc_bindack_len = sizeof(dcerpc_bindack);
|
|
|
|
|
|
|
|
uint32_t dcerpc_request1_len = sizeof(dcerpc_request1_len);
|
|
|
|
uint32_t dcerpc_response1_len = sizeof(dcerpc_response1_len);
|
|
|
|
|
|
|
|
uint32_t dcerpc_request2_len = sizeof(dcerpc_request2_len);
|
|
|
|
uint32_t dcerpc_response2_len = sizeof(dcerpc_response2_len);
|
|
|
|
|
|
|
|
uint32_t dcerpc_request3_len = sizeof(dcerpc_request3_len);
|
|
|
|
uint32_t dcerpc_response3_len = sizeof(dcerpc_response3_len);
|
|
|
|
|
|
|
|
memset(&th_v, 0, sizeof(th_v));
|
|
|
|
memset(&p, 0, sizeof(p));
|
|
|
|
memset(&f, 0, sizeof(f));
|
|
|
|
memset(&ssn, 0, sizeof(ssn));
|
|
|
|
|
|
|
|
p.src.family = AF_INET;
|
|
|
|
p.dst.family = AF_INET;
|
|
|
|
p.payload = NULL;
|
|
|
|
p.payload_len = 0;
|
|
|
|
p.proto = IPPROTO_TCP;
|
|
|
|
|
|
|
|
f.protoctx = (void *)&ssn;
|
|
|
|
p.flow = &f;
|
|
|
|
p.flowflags |= FLOW_PKT_TOSERVER;
|
|
|
|
ssn.alproto = ALPROTO_DCERPC;
|
|
|
|
|
|
|
|
StreamTcpInitConfig(TRUE);
|
|
|
|
StreamL7DataPtrInit(&ssn);
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
|
|
|
|
s = de_ctx->sig_list = SigInit(de_ctx,
|
|
|
|
"alert tcp any any -> any any "
|
|
|
|
"(msg:\"DCERPC\"; "
|
|
|
|
"dce_iface:338cd001-2244-31f1-aaaa-900038001003,=1,any_frag; "
|
|
|
|
"sid:1;)");
|
|
|
|
if (s == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
SigGroupBuild(de_ctx);
|
|
|
|
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
|
|
|
|
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START,
|
|
|
|
dcerpc_bind, dcerpc_bind_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
dcerpc_state = ssn.aldata[AlpGetStateIdx(ALPROTO_DCERPC)];
|
|
|
|
if (dcerpc_state == NULL) {
|
|
|
|
SCLogDebug("no dcerpc state: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack,
|
|
|
|
dcerpc_bindack_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
/* request1 */
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request1,
|
|
|
|
dcerpc_request1_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
/* response1 */
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response1,
|
|
|
|
dcerpc_response1_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
/* request2 */
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request2,
|
|
|
|
dcerpc_request2_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
/* response2 */
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response2,
|
|
|
|
dcerpc_response2_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
/* request3 */
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request3,
|
|
|
|
dcerpc_request3_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
/* response3 */
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOCLIENT | STREAM_EOF,
|
|
|
|
dcerpc_response3, dcerpc_response3_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
|
|
|
|
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
StreamL7DataPtrFree(&ssn);
|
|
|
|
StreamTcpFreeConfig(TRUE);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test Test a valid dce_iface entry for a bind and bind_ack
|
|
|
|
*/
|
|
|
|
static int DetectDceIfaceTestParse14(void)
|
|
|
|
{
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
ThreadVars th_v;
|
|
|
|
Packet p;
|
|
|
|
Flow f;
|
|
|
|
TcpSession ssn;
|
|
|
|
DetectEngineThreadCtx *det_ctx = NULL;
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
DCERPCState *dcerpc_state = NULL;
|
|
|
|
int r = 0;
|
|
|
|
|
|
|
|
uint8_t dcerpc_bind[] = {
|
|
|
|
0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x48, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0xb8, 0x10, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
|
|
|
|
0x6a, 0x28, 0x19, 0x39, 0x0c, 0xb1, 0xd0, 0x11,
|
|
|
|
0x9b, 0xa8, 0x00, 0xc0, 0x4f, 0xd9, 0x2e, 0xf5,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a,
|
|
|
|
0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00,
|
|
|
|
0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00,
|
|
|
|
};
|
|
|
|
|
|
|
|
uint8_t dcerpc_bindack[] = {
|
|
|
|
0x05, 0x00, 0x0c, 0x03, 0x10, 0x00, 0x00, 0x00,
|
|
|
|
0x44, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
|
|
0xb8, 0x10, 0xb8, 0x10, 0x26, 0x3d, 0x00, 0x00,
|
|
|
|
0x0c, 0x00, 0x5c, 0x50, 0x49, 0x50, 0x45, 0x5c,
|
|
|
|
0x6c, 0x73, 0x61, 0x73, 0x73, 0x00, 0x00, 0x00,
|
|
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11,
|
|
|
|
0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60,
|
|
|
|
0x02, 0x00, 0x00, 0x00
|
|
|
|
};
|
|
|
|
|
|
|
|
uint32_t dcerpc_bind_len = sizeof(dcerpc_bind);
|
|
|
|
uint32_t dcerpc_bindack_len = sizeof(dcerpc_bindack);
|
|
|
|
|
|
|
|
memset(&th_v, 0, sizeof(th_v));
|
|
|
|
memset(&p, 0, sizeof(p));
|
|
|
|
memset(&f, 0, sizeof(f));
|
|
|
|
memset(&ssn, 0, sizeof(ssn));
|
|
|
|
|
|
|
|
p.src.family = AF_INET;
|
|
|
|
p.dst.family = AF_INET;
|
|
|
|
p.payload = NULL;
|
|
|
|
p.payload_len = 0;
|
|
|
|
p.proto = IPPROTO_TCP;
|
|
|
|
|
|
|
|
f.protoctx = (void *)&ssn;
|
|
|
|
p.flow = &f;
|
|
|
|
p.flowflags |= FLOW_PKT_TOSERVER;
|
|
|
|
ssn.alproto = ALPROTO_DCERPC;
|
|
|
|
|
|
|
|
StreamTcpInitConfig(TRUE);
|
|
|
|
StreamL7DataPtrInit(&ssn);
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
|
|
|
|
s = de_ctx->sig_list = SigInit(de_ctx,
|
|
|
|
"alert tcp any any -> any any "
|
|
|
|
"(msg:\"DCERPC\"; "
|
|
|
|
"dce_iface:3919286a-b10c-11d0-9ba8-00c04fd92ef5,=0; "
|
|
|
|
"sid:1;)");
|
|
|
|
if (s == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
SigGroupBuild(de_ctx);
|
|
|
|
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
|
|
|
|
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START,
|
|
|
|
dcerpc_bind, dcerpc_bind_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
dcerpc_state = ssn.aldata[AlpGetStateIdx(ALPROTO_DCERPC)];
|
|
|
|
if (dcerpc_state == NULL) {
|
|
|
|
SCLogDebug("no dcerpc state: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
r = AppLayerParse(&f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack,
|
|
|
|
dcerpc_bindack_len);
|
|
|
|
if (r != 0) {
|
|
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do detect */
|
|
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
|
|
|
|
|
|
|
|
if (!PacketAlertCheck(&p, 1))
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
|
|
|
|
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
StreamL7DataPtrFree(&ssn);
|
|
|
|
StreamTcpFreeConfig(TRUE);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
void DetectDceIfaceRegisterTests(void)
|
|
|
|
{
|
|
|
|
|
|
|
|
#ifdef UNITTESTS
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse01", DetectDceIfaceTestParse01, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse02", DetectDceIfaceTestParse02, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse03", DetectDceIfaceTestParse03, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse04", DetectDceIfaceTestParse04, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse05", DetectDceIfaceTestParse05, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse06", DetectDceIfaceTestParse06, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse07", DetectDceIfaceTestParse07, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse08", DetectDceIfaceTestParse08, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse09", DetectDceIfaceTestParse09, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse10", DetectDceIfaceTestParse10, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse11", DetectDceIfaceTestParse11, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse12", DetectDceIfaceTestParse12, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse13", DetectDceIfaceTestParse13, 1);
|
|
|
|
UtRegisterTest("DetectDceIfaceTestParse14", DetectDceIfaceTestParse14, 1);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|