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Gentoo Linux Security Advisory GLSA 200511-07 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: OpenVPN: Multiple vulnerabilities |
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Date: November 06, 2005 |
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Bugs: #111116 |
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ID: 200511-07 |
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Synopsis |
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======== |
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|
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The OpenVPN client is potentially vulnerable to the execution of |
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arbitrary code and the OpenVPN server is vulnerable to a Denial of |
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Service issue. |
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Background |
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========== |
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|
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OpenVPN is a multi-platform, full-featured SSL VPN solution. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/openvpn < 2.0.4 >= 2.0.4 |
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Description |
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=========== |
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|
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The OpenVPN client contains a format string bug in the handling of the |
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foreign_option in options.c. Furthermore, when the OpenVPN server runs |
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in TCP mode, it may dereference a NULL pointer under specific error |
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conditions. |
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|
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Impact |
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====== |
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|
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A remote attacker could setup a malicious OpenVPN server and trick the |
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user into connecting to it, potentially executing arbitrary code on the |
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client's computer. A remote attacker could also exploit the NULL |
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dereference issue by sending specific packets to an OpenVPN server |
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running in TCP mode, resulting in a Denial of Service condition. |
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|
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Workaround |
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========== |
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|
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Do not use "pull" or "client" options in the OpenVPN client |
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configuration file, and use UDP mode for the OpenVPN server. |
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Resolution |
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========== |
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All OpenVPN users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/openvpn-2.0.4" |
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References |
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========== |
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[ 1 ] CVE-2005-3393 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3393 |
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[ 2 ] CVE-2005-3409 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3409 |
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[ 3 ] OpenVPN changelog |
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http://openvpn.net/changelog.html |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200511-07.xml |
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|
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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|
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Copyright 2005 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.0 |
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