RHEL 6 : bind-dyndb-ldap (RHSA-2012:0683)

Medium Nessus Plugin ID 59224


The remote Red Hat host is missing one or more security updates.


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.


Update the affected bind-dyndb-ldap and / or bind-dyndb-ldap-debuginfo packages.

See Also



Plugin Details

Severity: Medium

ID: 59224

File Name: redhat-RHSA-2012-0683.nasl

Version: $Revision: 1.12 $

Type: local

Agent: unix

Published: 2012/05/22

Modified: 2017/01/05

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 4.3

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

Temporal Vector: CVSS2#E:ND/RL:OF/RC:ND

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:bind-dyndb-ldap, p-cpe:/a:redhat:enterprise_linux:bind-dyndb-ldap-debuginfo, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:6.2

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2012/05/21

Reference Information

CVE: CVE-2012-2134

BID: 53236

OSVDB: 81619

RHSA: 2012:0683