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[ GLSA 200607-06 ] libpng: Buffer overflow
From: Thierry Carrez <koon () gentoo org>
Date: Wed, 19 Jul 2006 18:54:44 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200607-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: libpng: Buffer overflow Date: July 19, 2006 Bugs: #138433, #138672 ID: 200607-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A buffer overflow has been found in the libpng library that could lead to the execution of arbitrary code. Background ========== libpng is an open, extensible image format library, with lossless compression. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 libpng < 1.2.12 >= 1.2.12 2 emul-linux-x86-baselibs < 2.5.1 >= 2.5.1 ------------------------------------------------------------------- # Package 2 [app-emulation/emul-linux-x86-baselibs] only applies to AMD64 users. NOTE: Any packages listed without architecture tags apply to all architectures... ------------------------------------------------------------------- 2 affected packages ------------------------------------------------------------------- Description =========== In pngrutil.c, the function png_decompress_chunk() allocates insufficient space for an error message, potentially overwriting stack data, leading to a buffer overflow. Impact ====== By enticing a user to load a maliciously crafted PNG image, an attacker could execute arbitrary code with the rights of the user, or crash the application using the libpng library, such as the emul-linux-x86-baselibs. 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-1.2.12" All AMD64 emul-linux-x86-baselibs users should also upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-emulation/emul-linux-x86-baselibs-2.5.1" References ========== [ 1 ] libpng Changelog http://heanet.dl.sourceforge.net/sourceforge/libpng/libpng-1.2.12-README.txt [ 2 ] CVE-2006-3334 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3334 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200607-06.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 http://bugs.gentoo.org. License ======= Copyright 2006 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5
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- [ GLSA 200607-06 ] libpng: Buffer overflow Thierry Carrez (Jul 19)