CVE-2011-4868

Name	CVE-2011-4868
Description	The logging functionality in dhcpd in ISC DHCP before 4.2.3-P2, when using Dynamic DNS (DDNS) and issuing IPv6 addresses, does not properly handle the DHCPv6 lease structure, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets related to a lease-status update.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	655746

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
isc-dhcp (PTS)	bullseye	4.4.1-2.3+deb11u2	fixed
	bullseye (security)	4.4.1-2.3+deb11u1	fixed
	bookworm	4.4.3-P1-2	fixed
	forky, sid, trixie	4.4.3-P1-8	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
isc-dhcp	source	squeeze	(not affected)
isc-dhcp	source	(unstable)	4.2.2.dfsg.1-5	low		655746

[squeeze] - isc-dhcp <not-affected> (vulnerable code not present)