{"id":"DEBIAN-CVE-2009-0362","details":"filter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote attackers to cause a denial of service (forced authentication failures) via a crafted reverse-resolved DNS name (rhost) entry that contains a substring that is interpreted as an IP address, a different vulnerability than CVE-2007-4321.","modified":"2026-09-22T16:47:31.285246961Z","published":"2009-02-13T01:30:00.360Z","upstream":["CVE-2009-0362"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2009-0362"}],"affected":[{"package":{"name":"fail2ban","ecosystem":"Debian:12","purl":"pkg:deb/debian/fail2ban?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.3-2sid1"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-0362.json"}},{"package":{"name":"fail2ban","ecosystem":"Debian:13","purl":"pkg:deb/debian/fail2ban?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.3-2sid1"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-0362.json"}},{"package":{"name":"fail2ban","ecosystem":"Debian:14","purl":"pkg:deb/debian/fail2ban?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.3-2sid1"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-0362.json"}}],"schema_version":"1.9.0"}