The MemcmpLowercase function in Suricata before 2.0.6 improperly excludes the first byte from comparisons, which might allow remote attackers to bypass intrusion-prevention functionality via a crafted HTTP request.
https://redmine.openinfosecfoundation.org/issues/1364
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=777523
https://suricata-ids.org/2015/01/15/suricata-2-0-6-available/
Source: Mitre, NVD
Published: 2017-03-20
Updated: 2026-05-13
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.01862