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Red Hat Enterprise Linux 5 RHSA-2011-0346 Moderate: OpenLDAP Auth Issue

red hat
Calendar Grey March 10, 2011
Dist Redhat Esm H88
Enhanced security patches for OpenLDAP have been introduced for Red Hat Enterprise Linux 5, addressing significant vulnerabilities. Users are advised to upgrade.
Updated openldap packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 5

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259

Summary

OpenLDAP is an open source suite of LDAP (Lightweight Directory Access Protocol) applications and development tools.
A flaw was found in the way OpenLDAP handled authentication failures being passed from an OpenLDAP slave to the master. If OpenLDAP was configured with a chain overlay and it forwarded authentication failures, OpenLDAP would bind to the directory as an anonymous user and return success, rather than return failure on the authenticated bind. This could allow a user on a system that uses LDAP for authentication to log into a directory-based account without knowing the password. (CVE-2011-1024)
This update also fixes the following bug:
* Previously, multiple concurrent connections to an OpenLDAP server could cause the slapd service to terminate unexpectedly with an assertion error. This update adds mutexes to protect multiple threads from accessing a structure with a connection, and the slapd service no longer crashes. (BZ#677611)
Users of OpenLDAP should upgrade to these updated packages, which contain backported patches to resolve these issues. After installing this update, the OpenLDAP daemons will be restarted automatically.

Topics%20covered

Topics Covered

security advisory moderate security issue bug fix Red Hat Enterprise Linux OpenLDAP authentication flaw

References

https://access.redhat.com/security/cve/CVE-2011-1024 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: compat-openldap-2.3.43_2.2.29-12.el5_6.7.i386.rpm openldap-2.3.43-12.el5_6.7.i386.rpm openldap-clients-2.3.43-12.el5_6.7.i386.rpm openldap-debuginfo-2.3.43-12.el5_6.7.i386.rpm
x86_64: compat-openldap-2.3.43_2.2.29-12.el5_6.7.i386.rpm compat-openldap-2.3.43_2.2.29-12.el5_6.7.x86_64.rpm openldap-2.3.43-12.el5_6.7.i386.rpm openldap-2.3.43-12.el5_6.7.x86_64.rpm openldap-clients-2.3.43-12.el5_6.7.x86_64.rpm openldap-debuginfo-2.3.43-12.el5_6.7.i386.rpm openldap-debuginfo-2.3.43-12.el5_6.7.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
i386: openldap-debuginfo-2.3.43-12.el5_6.7.i386.rpm openldap-devel-2.3.43-12.el5_6.7.i386.rpm openldap-servers-2.3.43-12.el5_6.7.i386.rpm openldap-servers-overlays-2.3.43-12.el5_6.7.i386.rpm openldap-servers-sql-2.3.43-12.el5_6.7.i386.rpm
x86_64: openldap-debuginfo-2.3.43-12.el5_6.7.i386.rpm openldap-debuginfo-2.3.43-12.el5_6.7.x86_64.rpm openldap-devel-2.3.43-12.el5_6.7.i386.rpm openldap-devel-2.3.43-12.el5_6.7.x86_64.rpm openldap-servers-2.3.43-12.el5_6.7.x86_64.rpm openldap-servers-overlays-2.3.43-12.el5_6.7.x86_64.rpm openldap-servers-sql-2.3.43-12.el5_6.7.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: compat-openldap-2.3.43_2.2.29-12.el5_6.7.i386.rpm

Read the Full Advisory


Advisory ID: RHSA-2011:0346-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0346.html
Issue date: 2011-03-10

Topic

Updated openldap packages that fix one security issue and one bug are nowavailable for Red Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate security issue bug fix Red Hat Enterprise Linux OpenLDAP authentication flaw

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Bugs Fixed

680466 - CVE-2011-1024 openldap: forwarded bind failure messages cause success

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