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Red Hat Enterprise Linux 5 RHSA-2011:1459-01 Important DoS Fix

red hat
Calendar Grey November 17, 2011
Dist Redhat Esm H88
Critical notice for Red Hat users: recent bind97 patch addresses DNS vulnerability in Enterprise Linux 5.
Updated bind97 packages that fix one security issue are now available for Red Hat Enterprise Linux 5

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.
A flaw was discovered in the way BIND handled certain DNS queries, which caused it to cache an invalid record. A remote attacker could use this flaw to send repeated queries for this invalid record, causing the resolvers to exit unexpectedly due to a failed assertion. (CVE-2011-4313)
Users of bind97 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 DNS issue bind97

References

https://access.redhat.com/security/cve/CVE-2011-4313 https://access.redhat.com/security/updates/classification/#important https://kb.isc.org/docs/aa-00544

Package List

RHEL Desktop Workstation (v. 5 client):
Source:
i386: bind97-9.7.0-6.P2.el5_7.4.i386.rpm bind97-chroot-9.7.0-6.P2.el5_7.4.i386.rpm bind97-debuginfo-9.7.0-6.P2.el5_7.4.i386.rpm bind97-devel-9.7.0-6.P2.el5_7.4.i386.rpm bind97-libs-9.7.0-6.P2.el5_7.4.i386.rpm bind97-utils-9.7.0-6.P2.el5_7.4.i386.rpm
x86_64: bind97-9.7.0-6.P2.el5_7.4.x86_64.rpm bind97-chroot-9.7.0-6.P2.el5_7.4.x86_64.rpm bind97-debuginfo-9.7.0-6.P2.el5_7.4.i386.rpm bind97-debuginfo-9.7.0-6.P2.el5_7.4.x86_64.rpm bind97-devel-9.7.0-6.P2.el5_7.4.i386.rpm bind97-devel-9.7.0-6.P2.el5_7.4.x86_64.rpm bind97-libs-9.7.0-6.P2.el5_7.4.i386.rpm bind97-libs-9.7.0-6.P2.el5_7.4.x86_64.rpm bind97-utils-9.7.0-6.P2.el5_7.4.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: bind97-9.7.0-6.P2.el5_7.4.i386.rpm bind97-chroot-9.7.0-6.P2.el5_7.4.i386.rpm bind97-debuginfo-9.7.0-6.P2.el5_7.4.i386.rpm bind97-devel-9.7.0-6.P2.el5_7.4.i386.rpm bind97-libs-9.7.0-6.P2.el5_7.4.i386.rpm bind97-utils-9.7.0-6.P2.el5_7.4.i386.rpm
ia64: bind97-9.7.0-6.P2.el5_7.4.ia64.rpm bind97-chroot-9.7.0-6.P2.el5_7.4.ia64.rpm bind97-debuginfo-9.7.0-6.P2.el5_7.4.ia64.rpm bind97-devel-9.7.0-6.P2.el5_7.4.ia64.rpm bind97-libs-9.7.0-6.P2.el5_7.4.ia64.rpm bind97-utils-9.7.0-6.P2.el5_7.4.ia64.rpm
ppc: bind97-9.7.0-6.P2.el5_7.4.ppc.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:1459-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1459.html
Issue date: 2011-11-17

Topic

Updated bind97 packages that fix one security issue are now available forRed Hat Enterprise Linux 5.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 DNS issue bind97

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

Bugs Fixed

754398 - CVE-2011-4313 bind: Remote denial of service against recursive servers via logging negative cache entry

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