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Gentoo Linux Security Advisory GLSA 200607-06 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: libpng: Buffer overflow |
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Date: July 19, 2006 |
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Bugs: #138433, #138672 |
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ID: 200607-06 |
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Synopsis |
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======== |
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|
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A buffer overflow has been found in the libpng library that could lead |
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to the execution of arbitrary code. |
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|
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Background |
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========== |
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|
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libpng is an open, extensible image format library, with lossless |
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compression. |
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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 libpng < 1.2.12 >= 1.2.12 |
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2 emul-linux-x86-baselibs < 2.5.1 >= 2.5.1 |
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------------------------------------------------------------------- |
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# Package 2 [app-emulation/emul-linux-x86-baselibs] only applies |
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to AMD64 users. |
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|
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NOTE: Any packages listed without architecture tags apply to all |
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architectures... |
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------------------------------------------------------------------- |
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2 affected packages |
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------------------------------------------------------------------- |
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|
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Description |
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=========== |
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|
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In pngrutil.c, the function png_decompress_chunk() allocates |
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insufficient space for an error message, potentially overwriting stack |
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data, leading to a buffer overflow. |
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|
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Impact |
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====== |
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|
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By enticing a user to load a maliciously crafted PNG image, an attacker |
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could execute arbitrary code with the rights of the user, or crash the |
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application using the libpng library, such as the |
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emul-linux-x86-baselibs. |
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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 libpng users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.12" |
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All AMD64 emul-linux-x86-baselibs users should also upgrade to the |
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latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose |
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">=app-emulation/emul-linux-x86-baselibs-2.5.1" |
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|
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References |
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========== |
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[ 1 ] libpng Changelog |
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http://heanet.dl.sourceforge.net/sourceforge/libpng/libpng-1.2.12-README.txt |
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[ 2 ] CVE-2006-3334 |
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http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3334 |
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|
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Availability |
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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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http://security.gentoo.org/glsa/glsa-200607-06.xml |
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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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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2006 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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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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