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Red Hat Security Advisory 2012-1139-01

Red Hat Security Advisory 2012-1139-01
Posted Aug 3, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1139-01 - 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 performed the escaping of names from DNS requests for use in LDAP queries. A remote attacker able to send DNS queries to a named server that is configured to use bind-dyndb-ldap could use this flaw to cause named to exit unexpectedly with an assertion failure.

tags | advisory, remote
systems | linux, redhat
advisories | CVE-2012-3429
SHA-256 | 21ad281bbda64e6afba7cbfbd5bb1f6bc0aa4383815fd814c5f8361a16099c79

Red Hat Security Advisory 2012-1139-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: bind-dyndb-ldap security update
Advisory ID: RHSA-2012:1139-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-1139.html
Issue date: 2012-08-03
CVE Names: CVE-2012-3429
=====================================================================

1. Summary:

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

3. Description:

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 performed the escaping of names
from DNS requests for use in LDAP queries. A remote attacker able to send
DNS queries to a named server that is configured to use bind-dyndb-ldap
could use this flaw to cause named to exit unexpectedly with an assertion
failure. (CVE-2012-3429)

Red Hat would like to thank Sigbjorn Lie of Atea Norway 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.

4. 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/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

842466 - CVE-2012-3429 bind-dyndb-ldap: named DoS via DNS query with $ in name

6. Package List:

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/bind-dyndb-ldap-1.1.0-0.9.b1.el6_3.1.src.rpm

i386:
bind-dyndb-ldap-1.1.0-0.9.b1.el6_3.1.i686.rpm
bind-dyndb-ldap-debuginfo-1.1.0-0.9.b1.el6_3.1.i686.rpm

ppc64:
bind-dyndb-ldap-1.1.0-0.9.b1.el6_3.1.ppc64.rpm
bind-dyndb-ldap-debuginfo-1.1.0-0.9.b1.el6_3.1.ppc64.rpm

s390x:
bind-dyndb-ldap-1.1.0-0.9.b1.el6_3.1.s390x.rpm
bind-dyndb-ldap-debuginfo-1.1.0-0.9.b1.el6_3.1.s390x.rpm

x86_64:
bind-dyndb-ldap-1.1.0-0.9.b1.el6_3.1.x86_64.rpm
bind-dyndb-ldap-debuginfo-1.1.0-0.9.b1.el6_3.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/bind-dyndb-ldap-1.1.0-0.9.b1.el6_3.1.src.rpm

i386:
bind-dyndb-ldap-1.1.0-0.9.b1.el6_3.1.i686.rpm
bind-dyndb-ldap-debuginfo-1.1.0-0.9.b1.el6_3.1.i686.rpm

x86_64:
bind-dyndb-ldap-1.1.0-0.9.b1.el6_3.1.x86_64.rpm
bind-dyndb-ldap-debuginfo-1.1.0-0.9.b1.el6_3.1.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-3429.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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