Important CentOS bind-dyndb-ldap Update


bind-dyndb-ldap-0.2.0-7.el6_2.1.i686.rpm, bind-dyndb-ldap-0.2.0-7.el6_2.1.src.rpm, bind-dyndb-ldap-0.2.0-7.el6_2.1.x86_64.rpm,
2018-01-18 11:03
2017-07-27 20:03
2017-07-27 19:03
2017-04-01 19:05
2017-01-05 20:09


An updated bind-dyndb-ldap package that fixes one security issue is now
available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
important 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.

The dynamic LDAP back end is a plug-in for BIND that provides back-end
capabilities to LDAP databases. It features support for dynamic updates
and internal caching that help to reduce the load on LDAP servers.

A flaw was found in the way bind-dyndb-ldap handled LDAP query errors. If a
remote attacker were able to send DNS queries to a named server that is
configured to use bind-dyndb-ldap, they could trigger such an error with a
DNS query leveraging bind-dyndb-ldap's insufficient escaping of the LDAP
base DN (distinguished name). This would result in an invalid LDAP query
that named would retry in a loop, preventing it from responding to other
DNS queries. With this update, bind-dyndb-ldap only attempts to retry one
time when an LDAP search returns an unexpected error. (CVE-2012-2134)

Red Hat would like to thank Ronald van Zantvoort for reporting this issue.

All bind-dyndb-ldap users should upgrade to this updated package, which
contains a backported patch to correct this issue. For the update to take
effect, the named service must be restarted.
Please see

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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.

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Affected package information

Release Package Patched in
6 bind-dyndb-ldap bind-dyndb-ldap-0.2.0-7.el6_2.1.i686.rpm
bind-dyndb-ldap bind-dyndb-ldap-0.2.0-7.el6_2.1.src.rpm
bind-dyndb-ldap bind-dyndb-ldap-0.2.0-7.el6_2.1.x86_64.rpm