CVE-2013-2061

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.

Score

CVSS 2.0 2.6 Low

Status

Modified - secalert@redhat.com

Published

2013-11-18

Last modified

2024-08-06

Weaknesses

CWE-200

Affected products

• Opensuse (Opensuse)
• Openvpn (Openvpn)
• Openvpn Access Server (Openvpn)

References

• 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