mirror of https://github.com/OISF/suricata
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
838 lines
27 KiB
C
838 lines
27 KiB
C
/* Copyright (C) 2007-2020 Open Information Security Foundation
|
|
*
|
|
* You can copy, redistribute or modify this Program under the terms of
|
|
* the GNU General Public License version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* version 2 along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
* 02110-1301, USA.
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
*
|
|
* \author Anoop Saldanha <anoopsaldanha@gmail.com>
|
|
*
|
|
* Implements dce_iface keyword.
|
|
*/
|
|
|
|
#include "suricata-common.h"
|
|
|
|
#include "detect.h"
|
|
#include "detect-parse.h"
|
|
|
|
#include "detect-engine.h"
|
|
#include "detect-engine-mpm.h"
|
|
#include "detect-engine-state.h"
|
|
#include "detect-dce-iface.h"
|
|
|
|
#include "flow.h"
|
|
#include "flow-var.h"
|
|
#include "flow-util.h"
|
|
|
|
#include "app-layer.h"
|
|
#include "queue.h"
|
|
#include "stream-tcp-reassemble.h"
|
|
|
|
#include "util-debug.h"
|
|
#include "util-unittest.h"
|
|
#include "util-unittest-helper.h"
|
|
#include "stream-tcp.h"
|
|
|
|
#include "rust.h"
|
|
|
|
#define PARSE_REGEX "^\\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*,\\s*(<|>|=|!)([0-9]{1,5}))?(?:\\s*,\\s*(any_frag))?\\s*$"
|
|
|
|
static DetectParseRegex parse_regex;
|
|
|
|
static int DetectDceIfaceMatchRust(DetectEngineThreadCtx *det_ctx,
|
|
Flow *f, uint8_t flags, void *state, void *txv,
|
|
const Signature *s, const SigMatchCtx *m);
|
|
static int DetectDceIfaceSetup(DetectEngineCtx *, Signature *, const char *);
|
|
static void DetectDceIfaceFree(DetectEngineCtx *, void *);
|
|
#ifdef UNITTESTS
|
|
static void DetectDceIfaceRegisterTests(void);
|
|
#endif
|
|
static int g_dce_generic_list_id = 0;
|
|
|
|
static int InspectDceGeneric(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
|
|
const struct DetectEngineAppInspectionEngine_ *engine, const Signature *s, Flow *f,
|
|
uint8_t flags, void *alstate, void *txv, uint64_t tx_id);
|
|
|
|
/**
|
|
* \brief Registers the keyword handlers for the "dce_iface" keyword.
|
|
*/
|
|
void DetectDceIfaceRegister(void)
|
|
{
|
|
sigmatch_table[DETECT_DCE_IFACE].name = "dcerpc.iface";
|
|
sigmatch_table[DETECT_DCE_IFACE].alias = "dce_iface";
|
|
sigmatch_table[DETECT_DCE_IFACE].AppLayerTxMatch = DetectDceIfaceMatchRust;
|
|
sigmatch_table[DETECT_DCE_IFACE].Setup = DetectDceIfaceSetup;
|
|
sigmatch_table[DETECT_DCE_IFACE].Free = DetectDceIfaceFree;
|
|
#ifdef UNITTESTS
|
|
sigmatch_table[DETECT_DCE_IFACE].RegisterTests = DetectDceIfaceRegisterTests;
|
|
#endif
|
|
DetectSetupParseRegexes(PARSE_REGEX, &parse_regex);
|
|
|
|
g_dce_generic_list_id = DetectBufferTypeRegister("dce_generic");
|
|
|
|
DetectAppLayerInspectEngineRegister2(
|
|
"dce_generic", ALPROTO_DCERPC, SIG_FLAG_TOSERVER, 0, InspectDceGeneric, NULL);
|
|
DetectAppLayerInspectEngineRegister2(
|
|
"dce_generic", ALPROTO_SMB, SIG_FLAG_TOSERVER, 0, InspectDceGeneric, NULL);
|
|
|
|
DetectAppLayerInspectEngineRegister2(
|
|
"dce_generic", ALPROTO_DCERPC, SIG_FLAG_TOCLIENT, 0, InspectDceGeneric, NULL);
|
|
DetectAppLayerInspectEngineRegister2(
|
|
"dce_generic", ALPROTO_SMB, SIG_FLAG_TOCLIENT, 0, InspectDceGeneric, NULL);
|
|
}
|
|
|
|
static int InspectDceGeneric(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
|
|
const struct DetectEngineAppInspectionEngine_ *engine, const Signature *s, Flow *f,
|
|
uint8_t flags, void *alstate, void *txv, uint64_t tx_id)
|
|
{
|
|
return DetectEngineInspectGenericList(
|
|
de_ctx, det_ctx, s, engine->smd, f, flags, alstate, txv, tx_id);
|
|
}
|
|
|
|
/**
|
|
* \brief App layer match function for the "dce_iface" keyword.
|
|
*
|
|
* \param t Pointer to the ThreadVars instance.
|
|
* \param det_ctx Pointer to the DetectEngineThreadCtx.
|
|
* \param f Pointer to the flow.
|
|
* \param flags Pointer to the flags indicating the flow direction.
|
|
* \param state Pointer to the app layer state data.
|
|
* \param s Pointer to the Signature instance.
|
|
* \param m Pointer to the SigMatch.
|
|
*
|
|
* \retval 1 On Match.
|
|
* \retval 0 On no match.
|
|
*/
|
|
static int DetectDceIfaceMatchRust(DetectEngineThreadCtx *det_ctx,
|
|
Flow *f, uint8_t flags, void *state, void *txv,
|
|
const Signature *s, const SigMatchCtx *m)
|
|
{
|
|
SCEnter();
|
|
|
|
if (f->alproto == ALPROTO_DCERPC) {
|
|
// TODO check if state is NULL
|
|
return rs_dcerpc_iface_match(txv, state, (void *)m);
|
|
}
|
|
|
|
int ret = 0;
|
|
|
|
if (rs_smb_tx_get_dce_iface(f->alstate, txv, (void *)m) != 1) {
|
|
SCLogDebug("rs_smb_tx_get_dce_iface: didn't match");
|
|
} else {
|
|
SCLogDebug("rs_smb_tx_get_dce_iface: matched!");
|
|
ret = 1;
|
|
// TODO validate frag
|
|
}
|
|
SCReturnInt(ret);
|
|
}
|
|
|
|
/**
|
|
* \brief Creates a SigMatch for the "dce_iface" keyword being sent as argument,
|
|
* and appends it to the Signature(s).
|
|
*
|
|
* \param de_ctx Pointer to the detection engine context.
|
|
* \param s Pointer to signature for the current Signature being parsed
|
|
* from the rules.
|
|
* \param arg Pointer to the string holding the keyword value.
|
|
*
|
|
* \retval 0 on success, -1 on failure.
|
|
*/
|
|
|
|
static int DetectDceIfaceSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
|
|
{
|
|
SCEnter();
|
|
|
|
if (s->alproto != ALPROTO_UNKNOWN && s->alproto != ALPROTO_DCERPC &&
|
|
s->alproto != ALPROTO_SMB) {
|
|
SCLogError(SC_ERR_CONFLICTING_RULE_KEYWORDS, "rule contains conflicting keywords.");
|
|
return -1;
|
|
}
|
|
void *did = rs_dcerpc_iface_parse(arg);
|
|
if (did == NULL) {
|
|
SCLogError(SC_ERR_INVALID_SIGNATURE, "Error parsing dce_iface option in "
|
|
"signature");
|
|
return -1;
|
|
}
|
|
|
|
SigMatch *sm = SigMatchAlloc();
|
|
if (sm == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
sm->type = DETECT_DCE_IFACE;
|
|
sm->ctx = did;
|
|
|
|
SigMatchAppendSMToList(s, sm, g_dce_generic_list_id);
|
|
s->init_data->init_flags |= SIG_FLAG_INIT_DCERPC;
|
|
return 0;
|
|
}
|
|
|
|
static void DetectDceIfaceFree(DetectEngineCtx *de_ctx, void *ptr)
|
|
{
|
|
SCEnter();
|
|
if (ptr != NULL) {
|
|
rs_dcerpc_iface_free(ptr);
|
|
}
|
|
SCReturn;
|
|
}
|
|
|
|
/************************************Unittests*********************************/
|
|
|
|
#ifdef UNITTESTS
|
|
|
|
/**
|
|
* \test Test a valid dce_iface entry for a bind and bind_ack
|
|
*/
|
|
static int DetectDceIfaceTestParse1(void)
|
|
{
|
|
Signature *s = NULL;
|
|
ThreadVars th_v;
|
|
Packet *p = NULL;
|
|
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
|
|
};
|
|
|
|
uint8_t dcerpc_request[] = {
|
|
0x05, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00,
|
|
0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x09, 0x00,
|
|
0xad, 0x0d, 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_request_len = sizeof(dcerpc_request);
|
|
|
|
AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
|
|
|
|
memset(&th_v, 0, sizeof(th_v));
|
|
memset(&f, 0, sizeof(f));
|
|
memset(&ssn, 0, sizeof(ssn));
|
|
|
|
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
|
|
|
|
FLOW_INITIALIZE(&f);
|
|
f.protoctx = (void *)&ssn;
|
|
f.proto = IPPROTO_TCP;
|
|
p->flow = &f;
|
|
p->flowflags |= FLOW_PKT_TOSERVER;
|
|
p->flowflags |= FLOW_PKT_ESTABLISHED;
|
|
p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST;
|
|
f.alproto = ALPROTO_DCERPC;
|
|
|
|
StreamTcpInitConfig(true);
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
FAIL_IF(de_ctx == NULL);
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
s = DetectEngineAppendSig(de_ctx,"alert tcp any any -> any any "
|
|
"(msg:\"DCERPC\"; "
|
|
"dce_iface:3919286a-b10c-11d0-9ba8-00c04fd92ef5,=0,any_frag; "
|
|
"sid:1;)");
|
|
FAIL_IF(s == NULL);
|
|
|
|
SigGroupBuild(de_ctx);
|
|
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
|
|
|
|
SCLogDebug("handling to_server chunk");
|
|
|
|
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
|
|
STREAM_TOSERVER | STREAM_START, dcerpc_bind,
|
|
dcerpc_bind_len);
|
|
FAIL_IF(r != 0);
|
|
|
|
dcerpc_state = f.alstate;
|
|
FAIL_IF(dcerpc_state == NULL);
|
|
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
FAIL_IF(PacketAlertCheck(p, 1));
|
|
|
|
SCLogDebug("handling to_client chunk");
|
|
|
|
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
|
|
STREAM_TOCLIENT, dcerpc_bindack,
|
|
dcerpc_bindack_len);
|
|
FAIL_IF(r != 0);
|
|
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
FAIL_IF(PacketAlertCheck(p, 1));
|
|
|
|
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
|
|
STREAM_TOSERVER, dcerpc_request,
|
|
dcerpc_request_len);
|
|
FAIL_IF(r != 0);
|
|
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
FAIL_IF(!PacketAlertCheck(p, 1));
|
|
if (alp_tctx != NULL)
|
|
AppLayerParserThreadCtxFree(alp_tctx);
|
|
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
|
DetectEngineCtxFree(de_ctx);
|
|
StreamTcpFreeConfig(true);
|
|
FLOW_DESTROY(&f);
|
|
UTHFreePackets(&p, 1);
|
|
PASS;
|
|
}
|
|
|
|
/* Disabled because of bug_753. Would be enabled, once we rewrite
|
|
* dce parser */
|
|
#if 0
|
|
|
|
/**
|
|
* \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 = NULL;
|
|
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);
|
|
uint32_t dcerpc_response1_len = sizeof(dcerpc_response1);
|
|
|
|
uint32_t dcerpc_request2_len = sizeof(dcerpc_request2);
|
|
uint32_t dcerpc_response2_len = sizeof(dcerpc_response2);
|
|
|
|
uint32_t dcerpc_request3_len = sizeof(dcerpc_request3);
|
|
uint32_t dcerpc_response3_len = sizeof(dcerpc_response3);
|
|
|
|
AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
|
|
|
|
memset(&th_v, 0, sizeof(th_v));
|
|
memset(&p, 0, sizeof(p));
|
|
memset(&f, 0, sizeof(f));
|
|
memset(&ssn, 0, sizeof(ssn));
|
|
|
|
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
|
|
|
|
FLOW_INITIALIZE(&f);
|
|
f.protoctx = (void *)&ssn;
|
|
f.proto = IPPROTO_TCP;
|
|
p->flow = &f;
|
|
p->flowflags |= FLOW_PKT_TOSERVER;
|
|
p->flowflags |= FLOW_PKT_ESTABLISHED;
|
|
p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST;
|
|
f.alproto = ALPROTO_DCERPC;
|
|
|
|
StreamTcpInitConfig(true);
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
if (de_ctx == NULL)
|
|
goto end;
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
s = DetectEngineAppendSig(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);
|
|
|
|
SCLogDebug("chunk 1, bind");
|
|
|
|
r = AppLayerParserParse(alp_tctx, &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 = f.alstate;
|
|
if (dcerpc_state == NULL) {
|
|
SCLogDebug("no dcerpc state: ");
|
|
goto end;
|
|
}
|
|
|
|
p->flowflags &=~ FLOW_PKT_TOCLIENT;
|
|
p->flowflags |= FLOW_PKT_TOSERVER;
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (PacketAlertCheck(p, 1)) {
|
|
SCLogDebug("sig 1 didn't match after bind request: ");
|
|
goto end;
|
|
}
|
|
|
|
SCLogDebug("chunk 2, bind_ack");
|
|
|
|
r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack,
|
|
dcerpc_bindack_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
goto end;
|
|
}
|
|
|
|
p->flowflags &=~ FLOW_PKT_TOSERVER;
|
|
p->flowflags |= FLOW_PKT_TOCLIENT;
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (PacketAlertCheck(p, 1)) {
|
|
SCLogDebug("sig 1 matched again after bind ack: ");
|
|
goto end;
|
|
}
|
|
|
|
SCLogDebug("chunk 3, request 1");
|
|
|
|
/* request1 */
|
|
r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request1,
|
|
dcerpc_request1_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
goto end;
|
|
}
|
|
|
|
p->flowflags &=~ FLOW_PKT_TOCLIENT;
|
|
p->flowflags |= FLOW_PKT_TOSERVER;
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (!(PacketAlertCheck(p, 1))) {
|
|
SCLogDebug("sig 1 didn't match after request1: ");
|
|
goto end;
|
|
}
|
|
|
|
SCLogDebug("sending response1");
|
|
|
|
/* response1 */
|
|
r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response1,
|
|
dcerpc_response1_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
goto end;
|
|
}
|
|
|
|
p->flowflags &=~ FLOW_PKT_TOSERVER;
|
|
p->flowflags |= FLOW_PKT_TOCLIENT;
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (PacketAlertCheck(p, 1)) {
|
|
SCLogDebug("sig 1 matched after response1, but shouldn't: ");
|
|
goto end;
|
|
}
|
|
|
|
SCLogDebug("sending request2");
|
|
|
|
/* request2 */
|
|
r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request2,
|
|
dcerpc_request2_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
goto end;
|
|
}
|
|
|
|
p->flowflags &=~ FLOW_PKT_TOCLIENT;
|
|
p->flowflags |= FLOW_PKT_TOSERVER;
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (!(PacketAlertCheck(p, 1))) {
|
|
SCLogDebug("sig 1 didn't match after request2: ");
|
|
goto end;
|
|
}
|
|
|
|
/* response2 */
|
|
r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response2,
|
|
dcerpc_response2_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
goto end;
|
|
}
|
|
|
|
p->flowflags &=~ FLOW_PKT_TOSERVER;
|
|
p->flowflags |= FLOW_PKT_TOCLIENT;
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (PacketAlertCheck(p, 1)) {
|
|
SCLogDebug("sig 1 matched after response2, but shouldn't have: ");
|
|
goto end;
|
|
}
|
|
|
|
/* request3 */
|
|
r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request3,
|
|
dcerpc_request3_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
goto end;
|
|
}
|
|
|
|
p->flowflags &=~ FLOW_PKT_TOCLIENT;
|
|
p->flowflags |= FLOW_PKT_TOSERVER;
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (!(PacketAlertCheck(p, 1))) {
|
|
SCLogDebug("sig 1 didn't match after request3: ");
|
|
goto end;
|
|
}
|
|
|
|
/* response3 */
|
|
r = AppLayerParserParse(alp_tctx, &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;
|
|
}
|
|
|
|
p->flowflags &=~ FLOW_PKT_TOSERVER;
|
|
p->flowflags |= FLOW_PKT_TOCLIENT;
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (PacketAlertCheck(p, 1)) {
|
|
SCLogDebug("sig 1 matched after response3, but shouldn't have: ");
|
|
goto end;
|
|
}
|
|
|
|
result = 1;
|
|
|
|
end:
|
|
if (alp_tctx != NULL)
|
|
AppLayerParserThreadCtxFree(alp_tctx);
|
|
SigGroupCleanup(de_ctx);
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
StreamTcpFreeConfig(true);
|
|
UTHFreePackets(&p, 1);
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
|
|
/**
|
|
* \test Test a valid dce_iface entry for a bind and bind_ack
|
|
*/
|
|
static int DetectDceIfaceTestParse2(void)
|
|
{
|
|
int result = 0;
|
|
Signature *s = NULL;
|
|
ThreadVars th_v;
|
|
Packet *p = NULL;
|
|
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
|
|
};
|
|
|
|
uint8_t dcerpc_request[] = {
|
|
0x05, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00,
|
|
0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x09, 0x00,
|
|
0xad, 0x0d, 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_request_len = sizeof(dcerpc_request);
|
|
|
|
AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
|
|
|
|
memset(&th_v, 0, sizeof(th_v));
|
|
memset(&p, 0, sizeof(p));
|
|
memset(&f, 0, sizeof(f));
|
|
memset(&ssn, 0, sizeof(ssn));
|
|
|
|
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
|
|
|
|
FLOW_INITIALIZE(&f);
|
|
f.protoctx = (void *)&ssn;
|
|
f.proto = IPPROTO_TCP;
|
|
p->flow = &f;
|
|
p->flowflags |= FLOW_PKT_TOSERVER;
|
|
p->flowflags |= FLOW_PKT_ESTABLISHED;
|
|
p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST;
|
|
f.alproto = ALPROTO_DCERPC;
|
|
|
|
StreamTcpInitConfig(true);
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
if (de_ctx == NULL)
|
|
goto end;
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
s = DetectEngineAppendSig(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);
|
|
|
|
FLOWLOCK_WRLOCK(&f);
|
|
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
|
|
STREAM_TOSERVER | STREAM_START, dcerpc_bind,
|
|
dcerpc_bind_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
FLOWLOCK_UNLOCK(&f);
|
|
goto end;
|
|
}
|
|
FLOWLOCK_UNLOCK(&f);
|
|
|
|
dcerpc_state = f.alstate;
|
|
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;
|
|
|
|
FLOWLOCK_WRLOCK(&f);
|
|
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
|
|
STREAM_TOCLIENT, dcerpc_bindack,
|
|
dcerpc_bindack_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
FLOWLOCK_UNLOCK(&f);
|
|
goto end;
|
|
}
|
|
FLOWLOCK_UNLOCK(&f);
|
|
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (PacketAlertCheck(p, 1)) {
|
|
SCLogDebug("sig 1 matched but shouldn't have: ");
|
|
goto end;
|
|
}
|
|
|
|
FLOWLOCK_WRLOCK(&f);
|
|
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
|
|
STREAM_TOSERVER, dcerpc_request,
|
|
dcerpc_request_len);
|
|
if (r != 0) {
|
|
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
|
|
FLOWLOCK_UNLOCK(&f);
|
|
goto end;
|
|
}
|
|
FLOWLOCK_UNLOCK(&f);
|
|
|
|
/* do detect */
|
|
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
|
|
|
if (!PacketAlertCheck(p, 1)) {
|
|
SCLogDebug("sig 1 matched but shouldn't have: ");
|
|
goto end;
|
|
}
|
|
|
|
result = 1;
|
|
|
|
end:
|
|
if (alp_tctx != NULL)
|
|
AppLayerParserThreadCtxFree(alp_tctx);
|
|
SigGroupCleanup(de_ctx);
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
StreamTcpFreeConfig(true);
|
|
FLOW_DESTROY(&f);
|
|
UTHFreePackets(&p, 1);
|
|
return result;
|
|
}
|
|
|
|
static void DetectDceIfaceRegisterTests(void)
|
|
{
|
|
UtRegisterTest("DetectDceIfaceTestParse1", DetectDceIfaceTestParse1);
|
|
/* Disabled because of bug_753. Would be enabled, once we rewrite
|
|
* dce parser */
|
|
#if 0
|
|
UtRegisterTest("DetectDceIfaceTestParse13", DetectDceIfaceTestParse13, 1);
|
|
#endif
|
|
UtRegisterTest("DetectDceIfaceTestParse2", DetectDceIfaceTestParse2);
|
|
}
|
|
#endif /* UNITTESTS */
|