CVE-2011-0997

Name	CVE-2011-0997
Description	dhclient in ISC DHCP 3.0.x through 4.2.x before 4.2.1-P1, 3.1-ESV before 3.1-ESV-R1, and 4.1-ESV before 4.1-ESV-R2 allows remote attackers to execute arbitrary commands via shell metacharacters in a hostname obtained from a DHCP message, as demonstrated by a hostname that is provided to dhclient-script.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-2216-1, DSA-2217-1
Debian Bugs	621099

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
isc-dhcp (PTS)	buster	4.4.1-2+deb10u1	fixed
	buster (security)	4.4.1-2+deb10u3	fixed
	bullseye	4.4.1-2.3+deb11u2	fixed
	bullseye (security)	4.4.1-2.3+deb11u1	fixed
	bookworm	4.4.3-P1-2	fixed
	sid, trixie	4.4.3-P1-5	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
dhcp3	source	lenny	3.1.1-6+lenny5		DSA-2217-1
dhcp3	source	(unstable)	(unfixed)
isc-dhcp	source	squeeze	4.1.1-P1-15+squeeze2		DSA-2216-1
isc-dhcp	source	(unstable)	4.1.1-P1-16.1			621099