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Red Hat Enterprise Linux 5 and 6 RHSA-2011:0845-01 Important: Bind DoS

red hat
Calendar Grey May 31, 2011
Dist Redhat Esm H88
A crucial patch from Red Hat targets a bind vulnerability that could affect systems responsible for caching DNS requests.
Updated bind and bind97 packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 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/kb/docs/DOC-11259

Summary

The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly.
An off-by-one flaw was found in the way BIND processed negative responses with large resource record sets (RRSets). An attacker able to send recursive queries to a BIND server that is configured as a caching resolver could use this flaw to cause named to exit with an assertion failure. (CVE-2011-1910)
All BIND users are advised to upgrade to these updated packages, which resolve this issue. After installing the update, the BIND daemon (named) will be restarted automatically.

Topics%20covered

Topics Covered

security advisory DoS Red Hat Enterprise Linux important bind issue

References

https://access.redhat.com/security/cve/CVE-2011-1910 https://access.redhat.com/security/updates/classification#important

Package List

RHEL Desktop Workstation (v. 5 client):
Source:
i386: bind97-9.7.0-6.P2.el5_6.2.i386.rpm bind97-chroot-9.7.0-6.P2.el5_6.2.i386.rpm bind97-debuginfo-9.7.0-6.P2.el5_6.2.i386.rpm bind97-devel-9.7.0-6.P2.el5_6.2.i386.rpm bind97-libs-9.7.0-6.P2.el5_6.2.i386.rpm bind97-utils-9.7.0-6.P2.el5_6.2.i386.rpm
x86_64: bind97-9.7.0-6.P2.el5_6.2.x86_64.rpm bind97-chroot-9.7.0-6.P2.el5_6.2.x86_64.rpm bind97-debuginfo-9.7.0-6.P2.el5_6.2.i386.rpm bind97-debuginfo-9.7.0-6.P2.el5_6.2.x86_64.rpm bind97-devel-9.7.0-6.P2.el5_6.2.i386.rpm bind97-devel-9.7.0-6.P2.el5_6.2.x86_64.rpm bind97-libs-9.7.0-6.P2.el5_6.2.i386.rpm bind97-libs-9.7.0-6.P2.el5_6.2.x86_64.rpm bind97-utils-9.7.0-6.P2.el5_6.2.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: bind97-9.7.0-6.P2.el5_6.2.i386.rpm bind97-chroot-9.7.0-6.P2.el5_6.2.i386.rpm bind97-debuginfo-9.7.0-6.P2.el5_6.2.i386.rpm bind97-devel-9.7.0-6.P2.el5_6.2.i386.rpm bind97-libs-9.7.0-6.P2.el5_6.2.i386.rpm bind97-utils-9.7.0-6.P2.el5_6.2.i386.rpm
ia64: bind97-9.7.0-6.P2.el5_6.2.ia64.rpm bind97-chroot-9.7.0-6.P2.el5_6.2.ia64.rpm bind97-debuginfo-9.7.0-6.P2.el5_6.2.ia64.rpm bind97-devel-9.7.0-6.P2.el5_6.2.ia64.rpm bind97-libs-9.7.0-6.P2.el5_6.2.ia64.rpm bind97-utils-9.7.0-6.P2.el5_6.2.ia64.rpm
ppc: bind97-9.7.0-6.P2.el5_6.2.ppc.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:0845-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0845.html
Issue date: 2011-05-31

Topic

Updated bind and bind97 packages that fix one security issue are nowavailable for Red Hat Enterprise Linux 5 and 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 DoS Red Hat Enterprise Linux important bind issue

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

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

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

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

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

708301 - CVE-2011-1910 bind: Large RRSIG RRsets and Negative Caching can crash named

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