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[ GLSA 200611-01 ] Screen: UTF-8 character handling vulnerability
From: Matthias Geerdsen <vorlon () gentoo org>
Date: Fri, 03 Nov 2006 14:30:26 +0100
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200611-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Screen: UTF-8 character handling vulnerability Date: November 03, 2006 Bugs: #152770 ID: 200611-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Screen contains an error in its UTF-8 character handling code that would allow a remote Denial of Service or possibly the remote execution of arbitrary code. Background ========== Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-misc/screen < 4.0.3 >= 4.0.3 Description =========== cstone and Richard Felker discovered a flaw in Screen's UTF-8 combining character handling. Impact ====== The vulnerability can be exploited by writing a special string of characters to a Screen window. A remote attacker could cause a Denial of Service or possibly execute arbitrary code with the privileges of the user running Screen through a program being run inside a Screen session, such as an IRC client or a mail client. Workaround ========== There is no known workaround at this time. Resolution ========== All Screen users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-misc/screen-4.0.3" References ========== [ 1 ] CVE-2006-4573 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4573 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200611-01.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 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/2.5
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- [ GLSA 200611-01 ] Screen: UTF-8 character handling vulnerability Matthias Geerdsen (Nov 03)