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Red Hat: RHSA-2016:2142-01 Critical Update for BIND97 DoS Vulnerability

red hat
Calendar Grey November 2, 2016
Scroller Redhat
Critical bind97 patch release for Red Hat Enterprise Linux 5 fixes DNAME vulnerability that may lead to service disruption.
An update for bind97 is now available for Red Hat Enterprise Linux 5

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the update, the BIND daemon (named) will be restarted automatically.

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.
Security Fix(es):
* A denial of service flaw was found in the way BIND handled responses containing a DNAME answer. A remote attacker could use this flaw to make named exit unexpectedly with an assertion failure via a specially crafted DNS response. (CVE-2016-8864)
Red Hat would like to thank ISC for reporting this issue. Upstream acknowledges Tony Finch (University of Cambridge) and Marco Davids (SIDN Labs) as the original reporters.

Topics%20covered

Topics Covered

security advisory denial of service Red Hat security fix DNS important update bind97

References

https://access.redhat.com/security/cve/CVE-2016-8864 https://access.redhat.com/security/updates/classification#important https://kb.isc.org/docs/aa-01434

Package List

Red Hat Enterprise Linux Desktop Workstation (v. 5 client):
Source: bind97-9.7.0-21.P2.el5_11.9.src.rpm
i386: bind97-9.7.0-21.P2.el5_11.9.i386.rpm bind97-chroot-9.7.0-21.P2.el5_11.9.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.9.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.9.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.9.i386.rpm bind97-utils-9.7.0-21.P2.el5_11.9.i386.rpm
x86_64: bind97-9.7.0-21.P2.el5_11.9.x86_64.rpm bind97-chroot-9.7.0-21.P2.el5_11.9.x86_64.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.9.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.9.x86_64.rpm bind97-devel-9.7.0-21.P2.el5_11.9.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.9.x86_64.rpm bind97-libs-9.7.0-21.P2.el5_11.9.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.9.x86_64.rpm bind97-utils-9.7.0-21.P2.el5_11.9.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source: bind97-9.7.0-21.P2.el5_11.9.src.rpm
i386: bind97-9.7.0-21.P2.el5_11.9.i386.rpm bind97-chroot-9.7.0-21.P2.el5_11.9.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.9.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.9.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.9.i386.rpm bind97-utils-9.7.0-21.P2.el5_11.9.i386.rpm
ia64: bind97-9.7.0-21.P2.el5_11.9.ia64.rpm bind97-chroot-9.7.0-21.P2.el5_11.9.ia64.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.9.ia64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2142-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2142.html
Issue date: 2016-11-02

Topic

An update for bind97 is now available for Red Hat Enterprise Linux 5.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory denial of service Red Hat security fix DNS important update bind97

Relevant Releases Architectures

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

Red Hat Enterprise Linux Desktop Workstation (v. 5 client) - i386, x86_64

Bugs Fixed

1389652 - CVE-2016-8864 bind: assertion failure while handling responses containing a DNAME answer

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