Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Suricata-Ids | Suricata | < 4.0.4 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/12/msg00000.htmlMailing ListThird Party Advisory
- https://redmine.openinfosecfoundation.org/issues/2427Third Party Advisory
- https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/Vendor Advisory
- https://www.exploit-db.com/exploits/44247/ExploitThird Party AdvisoryVDB Entry
- https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/12/msg00000.htmlMailing ListThird Party Advisory
- https://redmine.openinfosecfoundation.org/issues/2427Third Party Advisory
- https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/Vendor Advisory
- https://www.exploit-db.com/exploits/44247/ExploitThird Party AdvisoryVDB Entry
FAQ
What is CVE-2018-6794?
CVE-2018-6794 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 compl...
How severe is CVE-2018-6794?
CVE-2018-6794 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-6794?
Check the references section above for vendor advisories and patch information. Affected products include: Suricata-Ids Suricata, Debian Debian Linux.