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[ GLSA 201201-12 ] Tor: Multiple vulnerabilities
From: Sean Amoss <ackle () gentoo org>
Date: Mon, 23 Jan 2012 15:21:41 -0500
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201201-12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Tor: Multiple vulnerabilities Date: January 23, 2012 Bugs: #388769, #394969 ID: 201201-12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in Tor, the most severe of which may allow a remote attacker to execute arbitrary code. Background ========== Tor is an implementation of second generation Onion Routing, a connection-oriented anonymizing communication service. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/tor < 0.2.2.35 >= 0.2.2.35 Description =========== Multiple vulnerabilities have been discovered in Tor: * When configured as client or bridge, Tor uses the same TLS certificate chain for all outgoing connections (CVE-2011-2768). * When configured as a bridge, Tor relays can distinguish incoming bridge connections from client connections (CVE-2011-2769). * An error in or/buffers.c could result in a heap-based buffer overflow (CVE-2011-2778). Impact ====== A remote attacker could possibly execute arbitrary code or cause a Denial of Service. Furthermore, a remote relay the user is directly connected to may be able to disclose anonymous information about that user or enumerate bridges in the user's connection. Workaround ========== There is no known workaround at this time. Resolution ========== All Tor users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/tor-0.2.2.35" References ========== [ 1 ] CVE-2011-2768 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2768 [ 2 ] CVE-2011-2769 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2769 [ 3 ] CVE-2011-2778 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2778 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201201-12.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 https://bugs.gentoo.org. License ======= Copyright 2012 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 201201-12 ] Tor: Multiple vulnerabilities Sean Amoss (Jan 23)