{"id":"DEBIAN-CVE-2003-0540","details":"The address parser code in Postfix 1.1.12 and earlier allows remote attackers to cause a denial of service (lock) via (1) a malformed envelope address to a local host that would generate a bounce and contains the \".!\" string in the MAIL FROM or Errors-To headers, which causes nqmgr to lock up, or (2) via a valid MAIL FROM with a RCPT TO containing a \".!\" string, which causes an instance of the SMTP listener to lock up.","modified":"2026-09-01T20:01:05.350960606Z","published":"2003-08-27T04:00:00Z","upstream":["CVE-2003-0540"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2003-0540"}],"affected":[{"package":{"name":"postfix","ecosystem":"Debian:12","purl":"pkg:deb/debian/postfix?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.12"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2003-0540.json"}},{"package":{"name":"postfix","ecosystem":"Debian:13","purl":"pkg:deb/debian/postfix?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.12"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2003-0540.json"}},{"package":{"name":"postfix","ecosystem":"Debian:14","purl":"pkg:deb/debian/postfix?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.12"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2003-0540.json"}}],"schema_version":"1.9.0"}