medium
4.6
CWE
264
Advisory Published
CVE Published
Updated

CVE-2011-1024

First published: Fri Feb 25 2011(Updated: )

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.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
OpenLDAP=2.4.17
OpenLDAP=2.4.6
OpenLDAP=2.4.11
OpenLDAP=2.4.8
OpenLDAP=2.4.9
OpenLDAP=2.4.16
OpenLDAP=2.4.22
OpenLDAP=2.4.20
OpenLDAP=2.4.15
OpenLDAP=2.4.18
OpenLDAP=2.4.7
OpenLDAP=2.4.23
OpenLDAP=2.4.14
OpenLDAP=2.4.19
OpenLDAP=2.4.12
OpenLDAP=2.4.21
OpenLDAP=2.4.13
OpenLDAP=2.4.10

Remedy

http://www.openldap.org/devel/cvsweb.cgi/servers/slapd/back-ldap/chain.c.diff?r1=1.76&r2=1.77&hideattic=1&sortbydate=0

Remedy

http://www.openldap.org/lists/openldap-announce/201102/msg00000.html

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-1024?

    CVE-2011-1024 has been categorized as having a medium severity due to its potential impact on authentication mechanisms.

  • How do I fix CVE-2011-1024?

    To mitigate CVE-2011-1024, upgrade OpenLDAP to version 2.4.24 or later, where the vulnerability has been resolved.

  • Which versions of OpenLDAP are affected by CVE-2011-1024?

    CVE-2011-1024 affects OpenLDAP versions prior to 2.4.24, including versions 2.4.6 to 2.4.23.

  • What is the main issue with CVE-2011-1024?

    The main issue with CVE-2011-1024 is that it allows remote authenticated users to bypass external-program authentication.

  • Is CVE-2011-1024 exploitability dependent on configuration?

    Yes, CVE-2011-1024's exploitability is contingent on using a master-slave configuration with the chain overlay and ppolicy_forward_updates.

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