{"action":"Upgrade sendmail to 8.14.3-9.1 or later.","affected":[{"fixed":"8.14.3-9.1","introduced":"0"}],"component":"sendmail","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["8.14.3-9.1"],"id":"tcs_01M5N9EPCSW1TATGGF4GWJSKHC","modified_at":"2026-10-23T17:47:28.637801367Z","published_at":"2010-01-04T21:30:00.640Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2009-4565","https://security-tracker.debian.org/tracker/CVE-2009-4565"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2009-4565","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2009-4565"}],"summary":"sendmail before 8.14.4 does not properly handle a '\\0' character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP ser"}