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Gentoo Linux Security Advisory GLSA 201612-55 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: libjpeg-turbo: User-assisted execution of arbitrary code |
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Date: December 31, 2016 |
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Bugs: #585782 |
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ID: 201612-55 |
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Synopsis |
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======== |
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|
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An out-of-bounds read in libjpeg-turbo might allow remote attackers to |
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execute arbitrary code. |
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|
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Background |
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========== |
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|
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libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, |
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SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and |
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decompression. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 media-libs/libjpeg-turbo |
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< 1.5.0 >= 1.5.0 |
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|
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Description |
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=========== |
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|
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The accelerated Huffman decoder was previously invoked if there were |
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128 bytes in the input buffer. However, it is possible to construct a |
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JPEG image with Huffman blocks > 430 bytes in length. This release |
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simply increases the minimum buffer size for the accelerated Huffman |
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decoder to 512 bytes, which should accommodate any possible input. |
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|
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Impact |
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====== |
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|
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A remote attacker could coerce the victim to run a specially crafted |
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image file resulting in the execution of arbitrary code. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All libjpeg-turbo users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libjpeg-turbo-1.5.0" |
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|
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References |
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========== |
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|
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[ 1 ] LJT-01-005 |
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https://wiki.mozilla.org/images/7/77/Libjpeg-turbo-report.pdf |
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[ 2 ] Prevent overread when decoding malformed JPEG |
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|
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https://github.com/libjpeg-turbo/libjpeg-turbo/commit/0463f7c9aad060fcd56e98d025ce16185279e2bc |
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|
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Availability |
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============ |
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|
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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|
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https://security.gentoo.org/glsa/201612-55 |
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|
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users' machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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https://bugs.gentoo.org. |
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|
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License |
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======= |
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|
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Copyright 2016 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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