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Red Hat Enterprise Linux 6 RHSA-2015:1471-01 Critical: BIND DoS Threat

red hat
Calendar Grey July 22, 2015
Scroller Redhat
Critical notice regarding bind security patch in Red Hat Enterprise Linux 6 tackles major DNSSEC vulnerability.
Updated bind packages that fix one security issue are 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.

For details on how to apply this update, refer to:

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

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 found in the way BIND performed DNSSEC validation. An attacker able to make BIND (functioning as a DNS resolver with DNSSEC validation enabled) resolve a name in an attacker-controlled domain could cause named to exit unexpectedly with an assertion failure. (CVE-2015-4620)
Red Hat would like to thank ISC for reporting this issue.
All bind users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the update, the BIND daemon (named) will be restarted automatically.

Topics%20covered

Topics Covered

security advisory critical issue DoS Red Hat Enterprise Linux system update BIND DNSSEC

References

https://access.redhat.com/security/cve/CVE-2015-4620 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: bind-9.8.2-0.37.rc1.el6_7.1.src.rpm
i386: bind-debuginfo-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-libs-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-utils-9.8.2-0.37.rc1.el6_7.1.i686.rpm
x86_64: bind-debuginfo-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-debuginfo-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm bind-libs-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-libs-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm bind-utils-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386: bind-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-chroot-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-debuginfo-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-devel-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-sdb-9.8.2-0.37.rc1.el6_7.1.i686.rpm
x86_64: bind-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm bind-chroot-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm bind-debuginfo-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-debuginfo-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm bind-devel-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-devel-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm bind-sdb-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: bind-9.8.2-0.37.rc1.el6_7.1.src.rpm
x86_64: bind-debuginfo-9.8.2-0.37.rc1.el6_7.1.i686.rpm bind-debuginfo-9.8.2-0.37.rc1.el6_7.1.x86_64.rpm bind-libs-9.8.2-0.37.rc1.el6_7.1.i686.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:1471-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:1471.html
Issue date: 2015-07-22

Topic

Updated bind packages that fix one security issue are now available for RedHat Enterprise Linux 6.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory critical issue DoS Red Hat Enterprise Linux system update BIND DNSSEC

Relevant Releases Architectures

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

1237258 - CVE-2015-4620 bind: abort DoS caused by uninitialized value use in isselfsigned()

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