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Gentoo: 201612-55 Normal: libjpeg-turbo Code Execution Threat

gentoo
Calendar Grey December 31, 2016
Dist Gentoo Esm H88
Cyber intruders might take advantage of vulnerabilities in libjpeg-turbo, allowing them to run malicious code. Ensure you update to mitigate potential security threats.
An out-of-bounds read in libjpeg-turbo might allow remote attackers to execute arbitrary code.

Summary

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.

Topics%20covered

Topics Covered

security advisory gentoo arbitrary code execution risk normal severity libjpeg-turbo

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

[ 1 ] LJT-01-005 https://wiki.mozilla.org/images/7/77/Libjpeg-turbo-report.pdf [ 2 ] Prevent overread when decoding malformed JPEG https://github.com/libjpeg-turbo/libjpeg-turbo/commit/0463f7c9aad060fcd56e98d025ce16185279e2bc

Availability

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

Severity: Normal
Title: libjpeg-turbo: User-assisted execution of arbitrary code
Date: December 31, 2016
Bugs: #585782
ID: 201612-55

Topics%20covered

Topics Covered

security advisory gentoo arbitrary code execution risk normal severity libjpeg-turbo

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 media-libs/libjpeg-turbo < 1.5.0 >= 1.5.0

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.

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