GLSA 201612-55: libjpeg-turbo: User-assisted execution of arbitrary code

http://security.gentoo.org/

Severity:	normal
Title:	libjpeg-turbo: User-assisted execution of arbitrary code
Date:	12/31/2016
Bugs:	#585782
ID:	201612-55

Synopsis

An out-of-bounds read in libjpeg-turbo might allow remote attackers to execute arbitrary code.

Background

libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
media-libs/libjpeg-turbo	< 1.5.0	>= 1.5.0	All supported architectures

Description

The accelerated Huffman decoder was previously invoked if there were 128 bytes in the input buffer. However, it is possible to construct a JPEG image with Huffman blocks > 430 bytes in length. This release simply increases the minimum buffer size for the accelerated Huffman decoder to 512 bytes, which should accommodate any possible input.

Impact

A remote attacker could coerce the victim to run a specially crafted image file resulting in the execution of arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All libjpeg-turbo users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=media-libs/libjpeg-turbo-1.5.0"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201612-55.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.