{"id":"CVE-2009-3942","aliases":["EUVD-2009-3913","GHSA-fq9p-mw8p-ccwj"],"status":"published","title":"Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\\0'...","description":"Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name 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.","severity":{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0108,"percentile":0.65319,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-310"],"published":"2009-11-16T19:00:00Z","modified":"2026-06-16T23:12:40Z","products":[{"vendor":"martin_lambers","product":"msmtp"}],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00007.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred"]},{"url":"http://msmtp.sourceforge.net/news.html","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://secunia.com/advisories/37321","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"http://www.vupen.com/english/advisories/2009/3224","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-3942"},{"url":"https://github.com/advisories/GHSA-fq9p-mw8p-ccwj"}],"sources":{"cve":[{"id":"CVE-2009-3942","description":"Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name 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.","status":"published","published":"2009-11-16T19:00:00Z","modified":"2024-08-07T06:45:50.505Z","updated_at":"2026-11-02T14:33:24.10565Z"}],"euvd":[{"id":"EUVD-2009-3913","description":"Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name 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.","status":"published","published":"2009-11-16T19:00:00Z","modified":"2024-08-07T06:45:50Z","updated_at":"2026-11-03T01:39:11.734855Z"}],"ghsa":[{"id":"GHSA-fq9p-mw8p-ccwj","title":"Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\\0'...","description":"Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name 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.","status":"published","published":"2022-05-02T03:50:01Z","modified":"2023-01-31T05:09:20Z","updated_at":"2026-11-02T14:49:30.42259Z"}],"nvd":[{"id":"CVE-2009-3942","description":"Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name 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.","status":"published","published":"2009-11-16T19:30:01.077Z","modified":"2026-06-16T23:12:40.363Z","cvss":[{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-310"],"updated_at":"2026-11-02T14:01:37.939838Z"}]}}