{
  "modified": "2025-08-09T19:01:26Z",
  "published": "2013-11-18T02:55:07Z",
  "id": "CVE-2013-2061",
  "details": "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.",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://lists.opensuse.org/opensuse-updates/2013-11/msg00012.html"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2013:167"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=960192"
    },
    {
      "type": "WEB",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105568.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105609.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-updates/2013-11/msg00016.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2013/05/06/6"
    },
    {
      "type": "WEB",
      "url": "https://bugs.gentoo.org/show_bug.cgi?id=468756"
    },
    {
      "type": "WEB",
      "url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc"
    }
  ]
}