CVE-2013-2061 Information

Description

The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier when running in UDP mode allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.

Reference

http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105568.html http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105609.html http://lists.opensuse.org/opensuse-updates/2013-11/msg00012.html http://lists.opensuse.org/opensuse-updates/2013-11/msg00016.html http://www.mandriva.com/security/advisories?name=MDVSA-2013:167 http://www.openwall.com/lists/oss-security/2013/05/06/6 https://bugs.gentoo.org/show_bug.cgi?id=468756 https://bugzilla.redhat.com/show_bug.cgi?id=960192 https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee