- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200705-24 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: libpng: Denial of Service Date: May 31, 2007 Bugs: #178004 ID: 200705-24 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A vulnerability in libpng may allow a remote attacker to crash applications that handle untrusted images. Background ========== libpng is a free ANSI C library used to process and manipulate PNG images. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 media-libs/libpng < 1.2.17 >= 1.2.17 Description =========== Mats Palmgren fixed an error in file pngrutil.c in which the trans[] array might be not allocated because of images with a bad tRNS chunk CRC value. Impact ====== A remote attacker could craft an image that when processed or viewed by an application using libpng causes the application to terminate abnormally. Workaround ========== There is no known workaround at this time. Resolution ========== Please note that due to separate bugs in libpng 1.2.17, Gentoo does not provide libpng-1.2.17 but libpng-1.2.18. All libpng users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.18" References ========== [ 1 ] CVE-2007-2445 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2445 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200705-24.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 2007 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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