CVE-2018-6794

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.

Affected products

Alt Linux, Suricata

Suricata-ids Suricata

< 4.0.4

Fix

Available

CVSS 3.0

5.3 MEDIUM

EPSS

24.3% (98th percentile)

Weakness

CWE-693

NVD status

Modified

Published

2018-02-07