CVE-2018-6794

moderate-risk
Published 2018-02-07

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.

Do I need to act?

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37.4% chance of exploitation in next 30 days
EPSS score — higher than 63% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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1 public exploit available
44247
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (2)

Suricata

Affected Vendors

Debian Suricata-Ids

References (10)

Patch https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346...
Mailing List https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html
Third Party Advisory https://redmine.openinfosecfoundation.org/issues/2427
Vendor Advisory https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/
Exploit https://www.exploit-db.com/exploits/44247/
Patch https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346...
Mailing List https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html
Third Party Advisory https://redmine.openinfosecfoundation.org/issues/2427
Vendor Advisory https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/
Exploit https://www.exploit-db.com/exploits/44247/
44
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 16/34 · Moderate
Exposure 7/34 · Low