NULL pointer dereference in libpng - CVE-2011-2691
Published: July 17, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU44883
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2011-2691
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: libpng
Affected software:
libpng
libpng
Detailed vulnerability description
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.
How to mitigate CVE-2011-2691
Install update from vendor's website.
Sources
- http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng;a=commit;h=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
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:151
- http://www.openwall.com/lists/oss-security/2011/07/13/2
- http://www.securityfocus.com/bid/48660
- https://bugzilla.redhat.com/show_bug.cgi?id=720608
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68537