{"id":"CVE-2011-4318","aliases":["DEBIAN-CVE-2011-4318","EUVD-2011-4252","GHSA-w2rf-p589-jpp8","RHSA-2013:0520"],"status":"published","title":"Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the...","description":"Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.","severity":{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-06","score":0.01321,"percentile":0.70997,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2013-03-07T01:00:00Z","modified":"2026-10-23T17:47:49Z","fixes":[{"ecosystem":"Debian:12","package":"dovecot","fixed_in":["1:2.0.18-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"dovecot","fixed_in":["1:2.0.18-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"dovecot","fixed_in":["1:2.0.18-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"dovecot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.0.18-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"dovecot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.0.18-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"dovecot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.0.18-1"}]}]},{"source":"osv","ecosystem":"Red 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2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.","status":"published","published":"2013-03-07T01:00:00Z","modified":"2024-08-07T00:01:51.65Z","updated_at":"2026-11-02T14:35:37.989579Z"}],"euvd":[{"id":"EUVD-2011-4252","description":"Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.","status":"published","published":"2013-03-07T01:00:00Z","modified":"2024-08-07T00:01:51Z","updated_at":"2026-11-03T01:39:49.441333Z"}],"ghsa":[{"id":"GHSA-w2rf-p589-jpp8","title":"Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the...","description":"Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.","status":"published","published":"2022-05-17T05:14:10Z","modified":"2023-01-28T05:03:23Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:43:58.014629Z"}],"nvd":[{"id":"CVE-2011-4318","description":"Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.","status":"published","published":"2013-03-07T01:55:01.617Z","modified":"2026-06-16T23:34:46.043Z","cvss":[{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:12.639283Z"}],"osv":[{"id":"CVE-2011-4318","description":"Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.","status":"published","published":"2013-03-07T01:55:01Z","modified":"2026-04-10T03:42:03.979045Z","updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2011-4318","description":"Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.","status":"published","published":"2013-03-07T01:55:01.617Z","modified":"2026-10-23T17:47:49.819947793Z","updated_at":"2026-11-02T15:45:24.612044Z"},{"id":"RHSA-2013:0520","title":"Red Hat Security Advisory: dovecot security and bug fix update","status":"published","published":"2024-09-15T20:21:00Z","modified":"2026-06-26T10:20:59Z","updated_at":"2026-11-02T15:53:01.993625Z"}]}}