CVE-2009-4212

Name	CVE-2009-4212
Description	Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the crypto library in MIT Kerberos 5 (aka krb5) 1.3 through 1.6.3, and 1.7 before 1.7.1, allow remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code by providing ciphertext with a length that is too short to be valid.
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-1969-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
krb5 (PTS)	jessie, jessie (lts)	1.12.1+dfsg-19+deb8u9	fixed
	stretch (security)	1.15-1+deb9u3	fixed
	stretch (lts), stretch	1.15-1+deb9u6	fixed
	buster, buster (lts)	1.17-3+deb10u7	fixed
	buster (security)	1.17-3+deb10u6	fixed
	bullseye (security), bullseye	1.18.3-6+deb11u5	fixed
	bookworm (security), bookworm	1.20.1-2+deb12u2	fixed
	sid, trixie	1.21.3-3	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
krb5	source	etch	1.4.4-7etch8		DSA-1969-1
krb5	source	lenny	1.6.dfsg.4~beta1-5lenny2		DSA-1969-1
krb5	source	(unstable)	1.8+dfsg~alpha1-1