The MemcmpLowercase function in Suricata before 2.0.6 improperly excludes the first byte from comparisons, which might allow remote attacke…

published 2017-03-20 9y ago modified 2026-06-17 4mo ago also EUVD-2015-8810

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.3%; EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits: 0; none known

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.

Patch / fix

distros 1

suricata Debian 14, Debian 13 2.0.6-1

debian advisories DEBIAN-CVE-2015-8954

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Exploit prediction

3.26% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-264 Permissions, Privileges, and Access Controls

References

suricata-ids.org /2015/01/15/suricata-2-0-6-available/
release-notes, vendor-advisory
redmine.openinfosecfoundation.org /issues/1364
third-party-advisory
bugs.debian.org /cgi-bin/bugreport.cgi?bug=777523
third-party-advisory

Sources

CVE List CVE-2015-8954
NVD CVE-2015-8954

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