CVE-2011-1024

Name	CVE-2011-1024
Description	chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy_forward_updates (aka authentication-failure forwarding) is used, allows remote authenticated users to bypass external-program authentication by sending an invalid password to a slave server.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	617606

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openldap (PTS)	buster, buster (security)	2.4.47+dfsg-3+deb10u7	fixed
	bullseye (security), bullseye	2.4.57+dfsg-3+deb11u1	fixed
	trixie, bookworm	2.5.13+dfsg-5	fixed
	sid	2.5.16+dfsg-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
openldap	source	lenny	2.4.11-1+lenny2.1
openldap	source	squeeze	2.4.23-7.1
openldap	source	(unstable)	2.4.25-1	low		617606