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[ GLSA 200511-07 ] OpenVPN: Multiple vulnerabilities
From: Thierry Carrez <koon () gentoo org>
Date: Sun, 06 Nov 2005 19:26:37 +0100
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200511-07 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: OpenVPN: Multiple vulnerabilities Date: November 06, 2005 Bugs: #111116 ID: 200511-07 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== The OpenVPN client is potentially vulnerable to the execution of arbitrary code and the OpenVPN server is vulnerable to a Denial of Service issue. Background ========== OpenVPN is a multi-platform, full-featured SSL VPN solution. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/openvpn < 2.0.4 >= 2.0.4 Description =========== The OpenVPN client contains a format string bug in the handling of the foreign_option in options.c. Furthermore, when the OpenVPN server runs in TCP mode, it may dereference a NULL pointer under specific error conditions. Impact ====== A remote attacker could setup a malicious OpenVPN server and trick the user into connecting to it, potentially executing arbitrary code on the client's computer. A remote attacker could also exploit the NULL dereference issue by sending specific packets to an OpenVPN server running in TCP mode, resulting in a Denial of Service condition. Workaround ========== Do not use "pull" or "client" options in the OpenVPN client configuration file, and use UDP mode for the OpenVPN server. Resolution ========== All OpenVPN users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/openvpn-2.0.4" References ========== [ 1 ] CVE-2005-3393 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3393 [ 2 ] CVE-2005-3409 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3409 [ 3 ] OpenVPN changelog http://openvpn.net/changelog.html Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200511-07.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
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- [ GLSA 200511-07 ] OpenVPN: Multiple vulnerabilities Thierry Carrez (Nov 07)