CVE-2011-4079

Name	CVE-2011-4079
Description	Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.
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)
Debian Bugs	647610

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openldap (PTS)	jessie, jessie (lts)	2.4.40+dfsg-1+deb8u11	fixed
	stretch (security), stretch (lts), stretch	2.4.44+dfsg-5+deb9u9	fixed
	buster, buster (security)	2.4.47+dfsg-3+deb10u7	fixed
	bullseye (security), bullseye	2.4.57+dfsg-3+deb11u1	fixed
	bookworm	2.5.13+dfsg-3	fixed
	sid	2.5.13+dfsg-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
openldap	source	(unstable)	2.4.28-1	unimportant		647610

Notes

Not exploitable with glibc, see
http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4079