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Red Hat Enterprise: RHSA-2016-2141-01 Critical Bind DoS

red hat
Calendar Grey November 2, 2016
Scroller Redhat
An important patch for bind addresses a critical denial of service flaw in Red Hat Enterprise Linux environments.
An update for bind is now available for Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6

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 bind Red Hat Enterprise security impact important update DoS flaw

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 (v. 5 client):
Source: bind-9.3.6-25.P1.el5_11.11.src.rpm
i386: bind-9.3.6-25.P1.el5_11.11.i386.rpm bind-debuginfo-9.3.6-25.P1.el5_11.11.i386.rpm bind-libs-9.3.6-25.P1.el5_11.11.i386.rpm bind-sdb-9.3.6-25.P1.el5_11.11.i386.rpm bind-utils-9.3.6-25.P1.el5_11.11.i386.rpm
x86_64: bind-9.3.6-25.P1.el5_11.11.x86_64.rpm bind-debuginfo-9.3.6-25.P1.el5_11.11.i386.rpm bind-debuginfo-9.3.6-25.P1.el5_11.11.x86_64.rpm bind-libs-9.3.6-25.P1.el5_11.11.i386.rpm bind-libs-9.3.6-25.P1.el5_11.11.x86_64.rpm bind-sdb-9.3.6-25.P1.el5_11.11.x86_64.rpm bind-utils-9.3.6-25.P1.el5_11.11.x86_64.rpm
Red Hat Enterprise Linux Desktop Workstation (v. 5 client):
Source: bind-9.3.6-25.P1.el5_11.11.src.rpm
i386: bind-chroot-9.3.6-25.P1.el5_11.11.i386.rpm bind-debuginfo-9.3.6-25.P1.el5_11.11.i386.rpm bind-devel-9.3.6-25.P1.el5_11.11.i386.rpm bind-libbind-devel-9.3.6-25.P1.el5_11.11.i386.rpm caching-nameserver-9.3.6-25.P1.el5_11.11.i386.rpm
x86_64: bind-chroot-9.3.6-25.P1.el5_11.11.x86_64.rpm bind-debuginfo-9.3.6-25.P1.el5_11.11.i386.rpm bind-debuginfo-9.3.6-25.P1.el5_11.11.x86_64.rpm bind-devel-9.3.6-25.P1.el5_11.11.i386.rpm bind-devel-9.3.6-25.P1.el5_11.11.x86_64.rpm bind-libbind-devel-9.3.6-25.P1.el5_11.11.i386.rpm bind-libbind-devel-9.3.6-25.P1.el5_11.11.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2141-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2141.html
Issue date: 2016-11-02

Topic

An update for bind is now available for Red Hat Enterprise Linux 5 and RedHat Enterprise Linux 6.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 bind Red Hat Enterprise security impact important update DoS flaw

Relevant Releases Architectures

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

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

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

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