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Add a note to the pcre extraction section stating that a flow: capture is dropped when the packet is inspected without a flow, and that such a packet still alerts. ICMPv4 error messages are one way to get such a packet: FlowCreateCheck returns false for them, while DecodeICMPV4 has already set p->payload, so they reach the detection engine with something to inspect and nowhere to store a flow variable. A packet the flow engine could not give a flow to once the memcap was reached and no used flow could be reclaimed is the other. The pkt: and alert: scopes described in the same section are unaffected, because a packet variable is stored on the packet and an alert variable on the alert. Issue: 8862 |
2 months ago | |
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| .. | ||
| dataset-examples | ||
| dns-keywords | ||
| fast-pattern | ||
| flow-keywords | ||
| header-keywords | ||
| http-keywords | ||
| intro | ||
| normalized-buffers | ||
| payload-keywords | 9 months ago | |
| pcre | ||
| rule-types | ||
| app-layer.rst | 4 months ago | |
| base64-keywords.rst | ||
| bypass-keyword.rst | 5 months ago | |
| config.rst | 6 months ago | |
| datasets.rst | 5 months ago | |
| dcerpc-keywords.rst | 6 months ago | |
| decode-layer.rst | 1 year ago | |
| dhcp-keywords.rst | 6 months ago | |
| differences-from-snort.rst | 6 months ago | |
| dnp3-keywords.rst | 12 months ago | |
| dns-keywords.rst | 6 months ago | |
| email-keywords.rst | 1 year ago | |
| enip-keyword.rst | 4 months ago | |
| fast-pattern-explained.rst | ||
| file-keywords.rst | 6 months ago | |
| flow-keywords.rst | 2 months ago | |
| ftp-keywords.rst | 4 months ago | |
| header-keywords.rst | 7 months ago | |
| http-keywords.rst | 6 months ago | |
| http2-keywords.rst | 1 year ago | |
| ike-keywords.rst | 8 months ago | |
| index.rst | 5 months ago | |
| integer-keywords.rst | 12 months ago | |
| intro.rst | 6 months ago | |
| ip-reputation-rules.rst | 6 months ago | |
| ipaddr.rst | ||
| ja-keywords.rst | 6 months ago | |
| kerberos-keywords.rst | 4 months ago | |
| ldap-keywords.rst | 1 year ago | |
| llmnr-keywords.rst | 5 months ago | |
| lua-detection.rst | 1 year ago | |
| mdns-keywords.rst | 6 months ago | |
| meta.rst | 6 months ago | |
| modbus-keyword.rst | ||
| mqtt-keywords.rst | 6 months ago | |
| multi-buffer-matching.rst | 6 months ago | |
| nfs-keywords.rst | 1 year ago | |
| noalert.rst | 6 months ago | |
| ntp-keywords.rst | 6 months ago | |
| payload-keywords.rst | 2 months ago | |
| pgsql-keywords.rst | 6 months ago | |
| prefilter-keywords.rst | 6 months ago | |
| quic-keywords.rst | ||
| rfb-keywords.rst | ||
| rule-types.rst | 1 year ago | |
| rules-internals.rst | 1 year ago | |
| sctp-keywords.rst | 4 months ago | |
| sdp-keywords.rst | ||
| sip-keywords.rst | ||
| smb-keywords.rst | 6 months ago | |
| smtp-keywords.rst | 6 months ago | |
| snmp-keywords.rst | 4 months ago | |
| ssh-keywords.rst | 6 months ago | |
| tag.rst | ||
| thresholding.rst | 9 months ago | |
| tls-keywords.rst | 6 months ago | |
| transforms.rst | 4 months ago | |
| vlan-keywords.rst | ||
| websocket-keywords.rst | 1 year ago | |
| xbits.rst | 6 months ago | |