libpng: Denial of service

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"