{"id":"CVE-2009-2408","aliases":["DEBIAN-CVE-2009-2408","DSA-1874-1","DSA-2025-1","EUVD-2009-2404","GHSA-pm7c-vg9h-jxxc","RHSA-2009:1184","RHSA-2009:1186","RHSA-2009:1190","RHSA-2009:1207","RHSA-2009:1432"],"status":"published","title":"Mozilla Network Security Services (NSS) before 3.12.3, Firefox before 3.0.13, Thunderbird before...","description":"Mozilla Network Security Services (NSS) before 3.12.3, Firefox before 3.0.13, Thunderbird before 2.0.0.23, and SeaMonkey before 1.1.18 do 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. NOTE: this was originally reported for Firefox before 3.5.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.05741,"percentile":0.93113,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-295"],"published":"2009-07-30T19:00:00Z","modified":"2026-10-23T18:00:51Z","fixes":[{"ecosystem":"Debian:12","package":"nss","fixed_in":["3.12.3-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"nss","fixed_in":["3.12.3-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"nss","fixed_in":["3.12.3-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"nss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.3-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"nss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.3-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"nss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.3-1"}]}]},{"source":"osv","ecosystem":"Debian:5.0","package":"nss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.3.1-0lenny1"}]}],"versions":["3.12.0-5","3.12.0-6","3.12.1-1","3.12.2.with.ckbi.1.73-1","3.12.2.with.ckbi.1.73-2","3.12.3-1"],"bundled":3},{"source":"osv","ecosystem":"Debian:5.0","package":"icedove","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0.24-0lenny1"}]}],"versions":["2.0.0.19-1","2.0.0.19-1+kbsd","2.0.0.22-0lenny1","2.0.0.22-1","2.0.0.22-1.1"],"bundled":6},{"source":"osv","ecosystem":"Red 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