{"id":"DEBIAN-CVE-2011-4539","details":"dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet.","modified":"2026-09-14T06:47:32.642835223Z","published":"2011-12-08T11:55:02.407Z","upstream":["CVE-2011-4539"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2011-4539"}],"affected":[{"package":{"name":"isc-dhcp","ecosystem":"Debian:12","purl":"pkg:deb/debian/isc-dhcp?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.2.dfsg.1-5"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-4539.json"}},{"package":{"name":"isc-dhcp","ecosystem":"Debian:13","purl":"pkg:deb/debian/isc-dhcp?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.2.dfsg.1-5"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-4539.json"}}],"schema_version":"1.9.0"}