What’s Vulnerable › Vulnerabilities

CVE-2011-2691

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2011-07-17 · updated 2026-06-16
• Weakness: CWE-476

Description

The png_err function in pngerror.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 makes a function call using a NULL pointer argument instead of an empty-string argument, which allows remote attackers to cause a denial of service (application crash) via a crafted PNG image.

Affected products

• Debian Linux: 5.0, 6.0
• Fedoraproject Fedora: 14
• pnggroup libpng: from 1.0.0 before 1.0.55; from 1.2.0 before 1.2.45; from 1.4.0 before 1.4.8; from 1.5.0 before 1.5.4 — fixed in 1.0.55, 1.2.45, 1.4.8, 1.5.4

How to fix

Upgrade to a fixed version: pnggroup libpng 1.0.55, 1.2.45, 1.4.8, 1.5.4. Check the vendor advisory for mitigations.

References

• http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng%3Ba=commit%3Bh=9dad5e37aef295b4ef8dea39392b652deebc9261
• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
• http://marc.info/?l=bugtraq&m=133951357207000&w=2
• http://secunia.com/advisories/45046
• http://secunia.com/advisories/45405
• http://secunia.com/advisories/45492
• http://secunia.com/advisories/49660
• http://security.gentoo.org/glsa/glsa-201206-15.xml
• http://support.apple.com/kb/HT5002
• http://www.debian.org/security/2011/dsa-2287
• http://www.libpng.org/pub/png/libpng.html

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