CVE-2018-6794

Name	CVE-2018-6794
Description	Suricata before 4.0.4 is prone to an HTTP detection bypass vulnerability in detect.c and stream-tcp.c. If a malicious server breaks a normal TCP flow and sends data before the 3-way handshake is complete, then the data sent by the malicious server will be accepted by web clients such as a web browser or Linux CLI utilities, but ignored by Suricata IDS signatures. This mostly affects IDS signatures for the HTTP protocol and TCP stream content; signatures for TCP packets will inspect such network traffic as usual.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1603-1, ELA-64-1
Debian Bugs	889842

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
suricata (PTS)	jessie, jessie (lts)	2.0.7-2+deb8u5	fixed
	stretch	3.2.1-1+deb9u1	vulnerable
	buster, buster (lts)	1:4.1.2-2+deb10u2	fixed
	bullseye	1:6.0.1-3	fixed
	bookworm	1:6.0.10-1	fixed
	sid, trixie	1:7.0.8-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
suricata	source	wheezy	1.2.1-2+deb7u3	ELA-64-1
suricata	source	jessie	2.0.7-2+deb8u3	DLA-1603-1
suricata	source	(unstable)	1:4.0.4-1		889842

Notes

[stretch] - suricata <no-dsa> (Minor issue)
[wheezy] - suricata <no-dsa> (Minor issue)
https://redmine.openinfosecfoundation.org/issues/2427
https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1