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Red Hat 6: RHSA-2012:1139-01 Important: bind-dyndb-ldap DoS

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Calendar Grey August 2, 2012
Scroller Redhat
An essential notification regarding bind-dyndb-ldap tackles a critical security vulnerability for Red Hat Enterprise Linux 6. Please update immediately!
An updated bind-dyndb-ldap package that fixes one security issue is now available for Red Hat Enterprise Linux 6

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

Summary

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.

Topics%20covered

Topics Covered

security advisory Red Hat DoS security patch important update bind-dyndb-ldap

References

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

Package List

Red Hat Enterprise Linux Server (v. 6):
Source:
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:
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


Severity
important
Lowest
Low
Medium
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Critical

Advisory ID: RHSA-2012:1139-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:1139.html
Issue date: 2012-08-03

Topic

An updated bind-dyndb-ldap package that fixes one security issue is nowavailable for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat DoS security patch important update bind-dyndb-ldap

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

Bugs Fixed

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

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