CVE-2011-4539

Name	CVE-2011-4539
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DSA-2519-1, DSA-2519-2
NVD severity	medium
Debian Bugs	652259

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
isc-dhcp (PTS)	stretch (security), stretch	4.3.5-3+deb9u1	fixed
	buster	4.4.1-2	fixed
	bullseye, sid	4.4.1-2.1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
dhcp3	source	(unstable)	(not affected)
isc-dhcp	source	squeeze	4.1.1-P1-15+squeeze6		DSA-2519-2
isc-dhcp	source	(unstable)	4.2.2.dfsg.1-5	low		652259

- dhcp3 <not-affected> (Only affects DHCP 4.x)