CVE-2015-2697

Name	CVE-2015-2697
Description	The build_principal_va function in lib/krb5/krb/bld_princ.c in MIT Kerberos 5 (aka krb5) before 1.14 allows remote authenticated users to cause a denial of service (out-of-bounds read and KDC crash) via an initial '\0' character in a long realm field within a TGS request.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-340-1, DSA-3395-1, DSA-3395-2
Debian Bugs	803088

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
krb5 (PTS)	bullseye (security), bullseye	1.18.3-6+deb11u5	fixed
	bookworm, bookworm (security)	1.20.1-2+deb12u2	fixed
	sid, trixie	1.21.3-4	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
krb5	source	squeeze	1.8.3+dfsg-4squeeze10	DLA-340-1
krb5	source	wheezy	1.10.1+dfsg-5+deb7u6	DSA-3395-2
krb5	source	jessie	1.12.1+dfsg-19+deb8u1	DSA-3395-1
krb5	source	(unstable)	1.13.2+dfsg-3		803088

https://github.com/krb5/krb5/commit/f0c094a1b745d91ef2f9a4eae2149aac026a5789
Upstream ticket: http://krbdev.mit.edu/rt/Ticket/Display.html?id=8252