{"id":"CVE-2009-0362","aliases":["DEBIAN-CVE-2009-0362","EUVD-2009-0366","GHSA-rc77-w9xr-6vvf"],"status":"published","title":"filter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote...","description":"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.","severity":{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01303,"percentile":0.7068,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-287"],"published":"2009-02-13T01:00:00Z","modified":"2026-10-23T17:47:31Z","fixes":[{"ecosystem":"Debian:12","package":"fail2ban","fixed_in":["0.8.3-2sid1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"fail2ban","fixed_in":["0.8.3-2sid1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"fail2ban","fixed_in":["0.8.3-2sid1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"fail2ban","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.3-2sid1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"fail2ban","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.3-2sid1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"fail2ban","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.3-2sid1"}]}]}],"products":[{"vendor":"fail2ban","product":"fail2ban"}],"references":[{"url":"http://secunia.com/advisories/33890","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.securityfocus.com/bid/33734","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514163","tags":["x_refsource_CONFIRM","x_transferred","Exploit","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-0362"},{"url":"https://github.com/advisories/GHSA-rc77-w9xr-6vvf"},{"url":"https://security-tracker.debian.org/tracker/CVE-2009-0362","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2009-0362","description":"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.","status":"published","published":"2009-02-13T01:00:00Z","modified":"2024-09-16T20:26:16.757Z","updated_at":"2026-11-02T14:33:25.896677Z"}],"euvd":[{"id":"EUVD-2009-0366","description":"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.","status":"published","published":"2009-02-13T01:00:00Z","modified":"2024-09-16T20:26:16Z","updated_at":"2026-11-03T00:55:14.02226Z"}],"ghsa":[{"id":"GHSA-rc77-w9xr-6vvf","title":"filter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote...","description":"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.","status":"published","published":"2022-05-02T03:14:55Z","modified":"2023-01-31T05:07:51Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:49:17.497915Z"}],"nvd":[{"id":"CVE-2009-0362","description":"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.","status":"published","published":"2009-02-13T01:30:00.36Z","modified":"2026-06-16T23:04:52.06Z","cvss":[{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:01:33.417327Z"}],"osv":[{"id":"CVE-2009-0362","description":"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.","status":"published","published":"2009-02-13T01:30:00Z","modified":"2026-04-10T03:40:35.894611Z","updated_at":"2026-11-02T15:43:57.452479Z"},{"id":"DEBIAN-CVE-2009-0362","description":"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.","status":"published","published":"2009-02-13T01:30:00.36Z","modified":"2026-10-23T17:47:31.269822198Z","updated_at":"2026-11-02T15:45:23.742363Z"}]}}