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Red Hat: RHSA-2015:2658-01 Important: bind97 DoS Attack

red hat
Calendar Grey December 16, 2015
Scroller Redhat
New bind97 updates for Red Hat Linux address critical DoS vulnerabilities, categorized as important by Red Hat Security. Refer to advisory ID for further information.
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.

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 denial of service flaw was found in the way BIND processed certain records with malformed class attributes. A remote attacker could use this flaw to send a query to request a cached record with a malformed class attribute that would cause named functioning as an authoritative or recursive server to crash. (CVE-2015-8000)
Note: This issue affects authoritative servers as well as recursive servers, however authoritative servers are at limited risk if they perform authentication when making recursive queries to resolve addresses for servers listed in NS RRSETs.
Red Hat would like to thank ISC for reporting this issue.
All bind97 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 security issue Red Hat DoS attack important update bind97

References

https://access.redhat.com/security/cve/CVE-2015-8000 https://access.redhat.com/security/updates/classification#important https://kb.isc.org/docs/aa-01317

Package List

Red Hat Enterprise Linux Desktop Workstation (v. 5 client):
Source: bind97-9.7.0-21.P2.el5_11.4.src.rpm
i386: bind97-9.7.0-21.P2.el5_11.4.i386.rpm bind97-chroot-9.7.0-21.P2.el5_11.4.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.4.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.4.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.4.i386.rpm bind97-utils-9.7.0-21.P2.el5_11.4.i386.rpm
x86_64: bind97-9.7.0-21.P2.el5_11.4.x86_64.rpm bind97-chroot-9.7.0-21.P2.el5_11.4.x86_64.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.4.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.4.x86_64.rpm bind97-devel-9.7.0-21.P2.el5_11.4.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.4.x86_64.rpm bind97-libs-9.7.0-21.P2.el5_11.4.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.4.x86_64.rpm bind97-utils-9.7.0-21.P2.el5_11.4.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source: bind97-9.7.0-21.P2.el5_11.4.src.rpm
i386: bind97-9.7.0-21.P2.el5_11.4.i386.rpm bind97-chroot-9.7.0-21.P2.el5_11.4.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.4.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.4.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.4.i386.rpm bind97-utils-9.7.0-21.P2.el5_11.4.i386.rpm
ia64: bind97-9.7.0-21.P2.el5_11.4.ia64.rpm bind97-chroot-9.7.0-21.P2.el5_11.4.ia64.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.4.ia64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:2658-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:2658.html
Issue date: 2015-12-16

Topic

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

1291176 - CVE-2015-8000 bind: responses with a malformed class attribute can trigger an assertion failure in db.c

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