Moderate CentOS openldap Security Update


openldap-2.4.40-8.el7.i686.rpm, openldap-2.4.40-8.el7.x86_64.rpm, openldap-clients-2.4.40-8.el7.x86_64.rpm, openldap-devel-2.4.40-8.el7.i686.rpm, openldap-devel-2.4.40-8.el7.x86_64.rpm, openldap-servers-2.4.40-8.el7.x86_64.rpm, openldap-servers-sql-2.4.40-8.el7.x86_64.rpm,
2018-01-18 11:11
2017-07-27 19:10
2017-04-01 19:09
2017-01-05 20:13


Updated openldap packages that fix one security issue, several bugs, and
add one enhancement are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

OpenLDAP is an open-source suite of Lightweight Directory Access Protocol
(LDAP) applications and development tools. LDAP is a set of protocols used
to access and maintain distributed directory information services over an
IP network. The openldap packages contain configuration files, libraries,
and documentation for OpenLDAP.

A flaw was found in the way OpenLDAP parsed OpenSSL-style cipher strings.
As a result, OpenLDAP could potentially use ciphers that were not intended
to be enabled. (CVE-2015-3276)

This issue was discovered by Martin Poole of the Red Hat Software
Maintenance Engineering group.

The openldap packages have been upgraded to upstream version 2.4.40, which
provides a number of bug fixes and one enhancement over the previous

* The ORDERING matching rules have been added to the ppolicy attribute type
* The server no longer terminates unexpectedly when processing SRV records.
* Missing objectClass information has been added, which enables the user to
modify the front-end configuration by standard means.


This update also fixes the following bugs:

* Previously, OpenLDAP did not properly handle a number of simultaneous
updates. As a consequence, sending a number of parallel update requests to
the server could cause a deadlock. With this update, a superfluous locking
mechanism causing the deadlock has been removed, thus fixing the bug.

* The httpd service sometimes terminated unexpectedly with a segmentation
fault on the libldap library unload. The underlying source code has been
modified to prevent a bad memory access error that caused the bug to occur.
As a result, httpd no longer crashes in this situation. (BZ#1158005)

* After upgrading the system from Red Hat Enterprise Linux 6 to Red Hat
Enterprise Linux 7, symbolic links to certain libraries unexpectedly
pointed to locations belonging to the openldap-devel package. If the user
uninstalled openldap-devel, the symbolic links were broken and the "rpm -V
openldap" command sometimes produced errors. With this update, the symbolic
links no longer get broken in the described situation. If the user
downgrades openldap to version 2.4.39-6 or earlier, the symbolic links
might break. After such downgrade, it is recommended to verify that the
symbolic links did not break. To do this, make sure the yum-plugin-verify
package is installed and obtain the target libraries by running the "rpm -V
openldap" or "yum verify openldap" command. (BZ#1230263)

In addition, this update adds the following enhancement:

* OpenLDAP clients now automatically choose the Network Security Services
(NSS) default cipher suites for communication with the server. It is no
longer necessary to maintain the default cipher suites manually in the
OpenLDAP source code. (BZ#1245279)

All openldap users are advised to upgrade to these updated packages, which
correct these issues and add this enhancement.
Please see

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

Or, you can just let us figure it out for you! Appcanary continously monitor your installed packages, and tell you if any of them are vulnerable.

Sign up for monitoring

Affected package information

Release Package Patched in
7 openldap openldap-2.4.40-8.el7.i686.rpm
openldap openldap-2.4.40-8.el7.x86_64.rpm
openldap-clients openldap-clients-2.4.40-8.el7.x86_64.rpm
openldap-devel openldap-devel-2.4.40-8.el7.i686.rpm
openldap-devel openldap-devel-2.4.40-8.el7.x86_64.rpm
openldap-servers openldap-servers-2.4.40-8.el7.x86_64.rpm
openldap-servers-sql openldap-servers-sql-2.4.40-8.el7.x86_64.rpm