{"id":"DEBIAN-CVE-2009-5023","details":"The (1) dshield.conf, (2) mail-buffered.conf, (3) mynetwatchman.conf, and (4) mynetwatchman.conf actions in action.d/ in Fail2ban before 0.8.5 allows local users to write to arbitrary files via a symlink attack on temporary files with predictable names, as demonstrated by /tmp/fail2ban-mail.txt.","modified":"2026-09-22T16:47:35.359425124Z","published":"2014-06-10T14:55:08.757Z","upstream":["CVE-2009-5023"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2009-5023"}],"affected":[{"package":{"name":"fail2ban","ecosystem":"Debian:12","purl":"pkg:deb/debian/fail2ban?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4+svn20110323-1"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-5023.json"}},{"package":{"name":"fail2ban","ecosystem":"Debian:13","purl":"pkg:deb/debian/fail2ban?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4+svn20110323-1"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-5023.json"}},{"package":{"name":"fail2ban","ecosystem":"Debian:14","purl":"pkg:deb/debian/fail2ban?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4+svn20110323-1"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-5023.json"}}],"schema_version":"1.9.0"}