libpng: Denial of Service — GLSA 200611-09

A vulnerability in libpng may allow a remote attacker to crash applications that handle untrusted images.

Affected Packages

media-libs/libpng on all architectures
Affected versions < 1.2.13
Unaffected versions >= 1.2.13

Background

libpng is a free ANSI C library used to process and manipulate PNG images.

Description

Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that a vulnerability exists in the sPLT chunk handling code of libpng, a large sPLT chunk may cause an application to attempt to read out of bounds.

Impact

A remote attacker could craft an image that when processed or viewed by an application using libpng causes the application to terminate abnormally.

Workaround

There is no known workaround at this time.

Resolution

All libpng users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.13"

References

Release Date
November 17, 2006

Latest Revision
November 17, 2006: 01

Severity
normal

Exploitable
remote

Bugzilla entries