From jaervosz@gentoo.org Fri Jul 22 01:36:09 2005 From: Sune Kloppenborg Jeppesen To: gentoo-announce@gentoo.org Cc: full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com, security-alerts@linuxsecurity.com Date: Fri, 22 Jul 2005 07:32:52 +0200 Subject: [Full-disclosure] [ GLSA 200507-19 ] zlib: Buffer overflow - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200507-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: zlib: Buffer overflow Date: July 22, 2005 Bugs: #99751 ID: 200507-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== zlib is vulnerable to a buffer overflow which could potentially lead to execution of arbitrary code. Background ========== zlib is a widely used free and patent unencumbered data compression library. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-libs/zlib < 1.2.3 >= 1.2.3 Description =========== zlib improperly handles invalid data streams which could lead to a buffer overflow. Impact ====== By creating a specially crafted compressed data stream, attackers can overwrite data structures for applications that use zlib, resulting in arbitrary code execution or a Denial of Service. Workaround ========== There is no known workaround at this time. Resolution ========== All zlib users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-libs/zlib-1.2.3" References ========== [ 1 ] Full Disclosure Announcement http://archives.neohapsis.com/archives/fulldisclosure/2005-07/0489.html [ 2 ] CAN-2005-1849 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-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-200507-19.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 2005 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 [ Part 1.2, Application/PGP-SIGNATURE 196bytes. ] [ Unable to print this part. ] [ Part 2: "Attached Text" ] _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/