{"id":"CVE-2009-3765","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-3765","generatedAt":"2026-10-27T18:33:38.014Z","title":"mutt_ssl.c in mutt 1.5.19 and 1.5.20, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL…","description":"mutt_ssl.c in mutt 1.5.19 and 1.5.20, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.","published":"2009-10-23T19:30:00.000Z","lastModified":"2026-06-16T23:12:19.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":6.8,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P"},"cwe":["CWE-310"],"affected":["mutt/mutt"],"epss":{"score":0.01051,"percentile":0.64046,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.05%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://dev.mutt.org/trac/changeset/6016:dc09812e63a3/mutt_ssl.c","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html","source":"cve@mitre.org"},{"url":"http://marc.info/?l=oss-security&m=125198917018936&w=2","source":"cve@mitre.org"},{"url":"http://marc.info/?l=oss-security&m=125369675820512&w=2","source":"cve@mitre.org"},{"url":"http://dev.mutt.org/trac/changeset/6016:dc09812e63a3/mutt_ssl.c","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://marc.info/?l=oss-security&m=125198917018936&w=2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://marc.info/?l=oss-security&m=125369675820512&w=2","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-3765","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}