- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200804-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: UnZip: User-assisted execution of arbitrary code Date: April 06, 2008 Bugs: #213761 ID: 200804-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A double free vulnerability discovered in UnZip might lead to the execution of arbitrary code. Background ========== Info-ZIP's UnZip is a tool to list and extract files inside PKZIP compressed files. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-arch/unzip < 5.52-r2 >= 5.52-r2 Description =========== Tavis Ormandy of the Google Security Team discovered that the NEEDBITS macro in the inflate_dynamic() function in the file inflate.c can be invoked using invalid buffers, which can lead to a double free. Impact ====== Remote attackers could entice a user or automated system to open a specially crafted ZIP file that might lead to the execution of arbitrary code or a Denial of Service. Workaround ========== There is no known workaround at this time. Resolution ========== All UnZip users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-arch/unzip-5.52-r2" References ========== [ 1 ] CVE-2008-0888 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0888 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200804-06.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 2008 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