- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200603-18 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Pngcrush: Buffer overflow Date: March 21, 2006 Bugs: #123286 ID: 200603-18 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Pngcrush is vulnerable to a buffer overflow which could potentially lead to the execution of arbitrary code. Background ========== Pngcrush is an optimizer for PNG files. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 media-gfx/pngcrush < 1.6.2 >= 1.6.2 Description =========== Carsten Lohrke of Gentoo Linux reported that Pngcrush contains a vulnerable version of zlib (GLSA 200507-19). Impact ====== By creating a specially crafted data stream, attackers can overwrite data structures for applications that use Pngcrush, resulting in a Denial of Service and potentially arbitrary code execution. Workaround ========== There is no known workaround at this time. Resolution ========== All Pngcrush users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=media-gfx/pngcrush-1.6.2" References ========== [ 1 ] GLSA 200507-19 http://www.gentoo.org/security/en/glsa/glsa-200507-19.xml [ 2 ] CVE-2005-1849 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1849 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200603-18.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@xxxxxxxxxx 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/2.0
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