Issued:

2011-03-10

Updated:

2011-03-10

RHSA-2011:0347 - Moderate: openldap security update

Synopsis

Moderate: openldap security update

Type/Severity

Security Advisory Moderate

Topic

Updated openldap packages that fix three security issues are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Description

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)

It was found that the OpenLDAP back-ndb back end allowed successful authentication to the root distinguished name (DN) when any string was provided as a password. A remote user could use this flaw to access an OpenLDAP directory if they knew the value of the root DN. Note: This issue only affected OpenLDAP installations using the NDB back-end, which is only available for Red Hat Enterprise Linux 6 via third-party software. (CVE-2011-1025)

A flaw was found in the way OpenLDAP handled modify relative distinguished name (modrdn) requests. A remote, unauthenticated user could use this flaw to crash an OpenLDAP server via a modrdn request containing an empty old RDN value. (CVE-2011-1081)

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.

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 This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

Updated Packages

• openldap-devel-2.4.19-15.el6_0.2.s390x.rpm
• openldap-servers-2.4.19-15.el6_0.2.i686.rpm
• openldap-debuginfo-2.4.19-15.el6_0.2.s390.rpm
• openldap-debuginfo-2.4.19-15.el6_0.2.s390x.rpm
• openldap-servers-sql-2.4.19-15.el6_0.2.s390x.rpm
• openldap-2.4.19-15.el6_0.2.x86_64.rpm
• openldap-debuginfo-2.4.19-15.el6_0.2.x86_64.rpm
• openldap-debuginfo-2.4.19-15.el6_0.2.ppc.rpm
• openldap-clients-2.4.19-15.el6_0.2.i686.rpm
• openldap-devel-2.4.19-15.el6_0.2.ppc64.rpm
• openldap-servers-2.4.19-15.el6_0.2.s390x.rpm
• compat-openldap-2.4.19_2.3.43-15.el6_0.2.x86_64.rpm
• openldap-servers-sql-2.4.19-15.el6_0.2.i686.rpm
• openldap-devel-2.4.19-15.el6_0.2.x86_64.rpm
• openldap-servers-2.4.19-15.el6_0.2.x86_64.rpm
• openldap-2.4.19-15.el6_0.2.s390.rpm
• compat-openldap-2.4.19_2.3.43-15.el6_0.2.ppc64.rpm
• openldap-clients-2.4.19-15.el6_0.2.ppc64.rpm
• openldap-clients-2.4.19-15.el6_0.2.s390x.rpm
• openldap-servers-sql-2.4.19-15.el6_0.2.x86_64.rpm
• openldap-debuginfo-2.4.19-15.el6_0.2.ppc64.rpm
• openldap-devel-2.4.19-15.el6_0.2.s390.rpm
• openldap-devel-2.4.19-15.el6_0.2.i686.rpm
• openldap-2.4.19-15.el6_0.2.src.rpm
• openldap-debuginfo-2.4.19-15.el6_0.2.i686.rpm
• compat-openldap-2.4.19_2.3.43-15.el6_0.2.i686.rpm
• openldap-2.4.19-15.el6_0.2.i686.rpm
• openldap-2.4.19-15.el6_0.2.ppc.rpm
• openldap-servers-2.4.19-15.el6_0.2.ppc64.rpm
• openldap-2.4.19-15.el6_0.2.ppc64.rpm
• compat-openldap-2.4.19_2.3.43-15.el6_0.2.s390x.rpm
• openldap-clients-2.4.19-15.el6_0.2.x86_64.rpm
• openldap-servers-sql-2.4.19-15.el6_0.2.ppc64.rpm
• compat-openldap-2.4.19_2.3.43-15.el6_0.2.s390.rpm
• openldap-devel-2.4.19-15.el6_0.2.ppc.rpm
• openldap-2.4.19-15.el6_0.2.s390x.rpm
• compat-openldap-2.4.19_2.3.43-15.el6_0.2.ppc.rpm

Fixes

• This content is not included.BZ - 680466
• This content is not included.BZ - 680472
• This content is not included.BZ - 680975

CVEs

• CVE-2011-1024
• CVE-2011-1081
• CVE-2011-1025

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.