NULL pointer dereference in libpng - CVE-2011-2691

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Main Vulnerability Database Vulnerabilities #VU44883

NULL pointer dereference in libpng - CVE-2011-2691

Published: July 17, 2011 / Updated: August 11, 2020


Vulnerability identifier: #VU44883
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-2691
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

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 software

libpng
Gentoo Linux
Fedora
openEuler
libpng10
syslinux
syslinux-extlinux-nonlinux
syslinux-nonlinux
syslinux-tftpboot
syslinux-debuginfo
syslinux-debugsource
syslinux-devel
syslinux-efi64
syslinux-extlinux
syslinux-perl

How to mitigate CVE-2011-2691

Install update from vendor's website.

libpng - update to 1.5.4
libpng10 - update to 1.0.55-1.el6
syslinux - update to 6.04-16
syslinux-extlinux-nonlinux - update to 6.04-16
syslinux-nonlinux - update to 6.04-16
syslinux-tftpboot - update to 6.04-16
syslinux-debuginfo - update to 6.04-16
syslinux-debugsource - update to 6.04-16
syslinux-devel - update to 6.04-16
syslinux-efi64 - update to 6.04-16
syslinux-extlinux - update to 6.04-16
syslinux-perl - update to 6.04-16

External References

Related Security Bulletins