Medium severity5.3OSV Advisory· Published Feb 7, 2018· Updated Jun 17, 2026
CVE-2018-6794
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.
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Affected products
1Patches
Vulnerability mechanics
References
5- github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1nvdPatchThird Party Advisory
- www.exploit-db.com/exploits/44247/nvdExploitThird Party AdvisoryVDB Entry
- lists.debian.org/debian-lts-announce/2018/12/msg00000.htmlnvdMailing ListThird Party Advisory
- redmine.openinfosecfoundation.org/issues/2427nvdThird Party Advisory
- suricata-ids.org/2018/02/14/suricata-4-0-4-available/nvdVendor Advisory
News mentions
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