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[ GLSA 200711-08 ] libpng: Multiple Denials of Service
From: Pierre-Yves Rofes <py () gentoo org>
Date: Wed, 07 Nov 2007 21:15:31 +0100
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200711-08 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: libpng: Multiple Denials of Service Date: November 07, 2007 Bugs: #195261 ID: 200711-08 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Several vulnerabilities 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 < 1.2.21-r3 >= 1.2.21-r3 Description =========== An off-by-one error when handling ICC profile chunks in the png_set_iCCP() function was discovered (CVE-2007-5266). George Cook and Jeff Phillips reported several errors in pngrtran.c, the use of logical instead of a bitwise functions and incorrect comparisons (CVE-2007-5268). Tavis Ormandy reported out-of-bounds read errors in several PNG chunk handling functions (CVE-2007-5269). Impact ====== A remote attacker could craft an image that when processed or viewed by an application using libpng would cause the application to terminate abnormally. 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-1.2.21-r3" References ========== [ 1 ] CVE-2007-5266 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5266 [ 2 ] CVE-2007-5268 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5268 [ 3 ] CVE-2007-5269 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5269 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200711-08.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 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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHMhzjuhJ+ozIKI5gRAvvcAJ9POnVZo+5eGaeH6xELJSZhC6eeuwCffECb KS8p+WDYlscGB/Ry4EVHkuc= =nG1m -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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- [ GLSA 200711-08 ] libpng: Multiple Denials of Service Pierre-Yves Rofes (Nov 07)