{"id":"CVE-2013-2061","aliases":["DEBIAN-CVE-2013-2061","EUVD-2013-2042","GHSA-j3mr-328w-64j3"],"status":"published","title":"The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode,...","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.","severity":{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02813,"percentile":0.86624,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2013-11-15T18:16:00Z","modified":"2026-09-01T20:03:15Z","fixes":[{"ecosystem":"Debian:12","package":"openvpn","fixed_in":["2.3.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"openvpn","fixed_in":["2.3.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openvpn","fixed_in":["2.3.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-1"}]}]}],"products":[{"vendor":"opensuse","product":"opensuse"},{"vendor":"openvpn","product":"openvpn"},{"vendor":"openvpn","product":"openvpn_access_server"}],"references":[{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105568.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105609.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-updates/2013-11/msg00012.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Vendor Advisory","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=960192","tags":["x_refsource_CONFIRM","x_transferred","report"]},{"url":"http://www.openwall.com/lists/oss-security/2013/05/06/6","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2013:167","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred","advisory"]},{"url":"http://lists.opensuse.org/opensuse-updates/2013-11/msg00016.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://bugs.gentoo.org/show_bug.cgi?id=468756","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","evidence","fix"]},{"url":"https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-2061"},{"url":"https://github.com/advisories/GHSA-j3mr-328w-64j3"},{"url":"https://security-tracker.debian.org/tracker/CVE-2013-2061","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2013-2061","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.","status":"published","published":"2013-11-15T18:16:00Z","modified":"2024-08-06T15:20:37.491Z","updated_at":"2026-11-02T14:34:56.530545Z"}],"euvd":[{"id":"EUVD-2013-2042","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.","status":"published","published":"2013-11-15T18:16:00Z","modified":"2024-08-06T15:20:37Z","updated_at":"2026-11-03T01:56:40.030926Z"}],"ghsa":[{"id":"GHSA-j3mr-328w-64j3","title":"The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode,...","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.","status":"published","published":"2022-05-13T01:26:38Z","modified":"2023-02-01T05:07:46Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:50:36.63783Z"}],"nvd":[{"id":"CVE-2013-2061","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.","status":"published","published":"2013-11-18T02:55:07.53Z","modified":"2026-06-16T23:52:40.45Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:02:40.988689Z"}],"osv":[{"id":"CVE-2013-2061","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.","status":"published","published":"2013-11-18T02:55:07Z","modified":"2026-04-10T03:44:24.995974Z","updated_at":"2026-11-02T15:43:59.09154Z"},{"id":"DEBIAN-CVE-2013-2061","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.","status":"published","published":"2013-11-18T02:55:07.53Z","modified":"2026-09-01T20:03:15.464345704Z","updated_at":"2026-11-02T15:45:25.514579Z"}]}}