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Red Hat: RHSA-2013:0690-01 Important: bind97 DoS Flaw Addressed

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Calendar Grey March 28, 2013
Scroller Redhat
The Red Hat advisory RHSA-2013:0690-01 addresses a critical flaw in Bind97, a popular DNS server, urging users to apply updates to prevent unauthorized access or denial of service attacks.
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/knowledge/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 libdns library. A remote attacker could use this flaw to send a specially-crafted DNS query to named that, when processed, would cause named to use an excessive amount of memory, or possibly crash. (CVE-2013-2266)
Note: This update disables the syntax checking of NAPTR (Naming Authority Pointer) resource records.
All bind97 users are advised to upgrade to these updated packages, which contain a patch to correct this issue. After installing the update, the BIND daemon (named) will be restarted automatically.

Topics%20covered

Topics Covered

security advisory update DoS Red Hat Enterprise Linux important resource consumption bind97

References

https://access.redhat.com/security/cve/CVE-2013-2266 https://access.redhat.com/security/updates/classification/#important

Package List

RHEL Desktop Workstation (v. 5 client):
Source:
i386: bind97-9.7.0-17.P2.el5_9.1.i386.rpm bind97-chroot-9.7.0-17.P2.el5_9.1.i386.rpm bind97-debuginfo-9.7.0-17.P2.el5_9.1.i386.rpm bind97-devel-9.7.0-17.P2.el5_9.1.i386.rpm bind97-libs-9.7.0-17.P2.el5_9.1.i386.rpm bind97-utils-9.7.0-17.P2.el5_9.1.i386.rpm
x86_64: bind97-9.7.0-17.P2.el5_9.1.x86_64.rpm bind97-chroot-9.7.0-17.P2.el5_9.1.x86_64.rpm bind97-debuginfo-9.7.0-17.P2.el5_9.1.i386.rpm bind97-debuginfo-9.7.0-17.P2.el5_9.1.x86_64.rpm bind97-devel-9.7.0-17.P2.el5_9.1.i386.rpm bind97-devel-9.7.0-17.P2.el5_9.1.x86_64.rpm bind97-libs-9.7.0-17.P2.el5_9.1.i386.rpm bind97-libs-9.7.0-17.P2.el5_9.1.x86_64.rpm bind97-utils-9.7.0-17.P2.el5_9.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: bind97-9.7.0-17.P2.el5_9.1.i386.rpm bind97-chroot-9.7.0-17.P2.el5_9.1.i386.rpm bind97-debuginfo-9.7.0-17.P2.el5_9.1.i386.rpm bind97-devel-9.7.0-17.P2.el5_9.1.i386.rpm bind97-libs-9.7.0-17.P2.el5_9.1.i386.rpm bind97-utils-9.7.0-17.P2.el5_9.1.i386.rpm
ia64: bind97-9.7.0-17.P2.el5_9.1.ia64.rpm bind97-chroot-9.7.0-17.P2.el5_9.1.ia64.rpm bind97-debuginfo-9.7.0-17.P2.el5_9.1.ia64.rpm bind97-devel-9.7.0-17.P2.el5_9.1.ia64.rpm bind97-libs-9.7.0-17.P2.el5_9.1.ia64.rpm bind97-utils-9.7.0-17.P2.el5_9.1.ia64.rpm
ppc:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2013:0690-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:0690.html
Issue date: 2013-03-28

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 update DoS Red Hat Enterprise Linux important resource consumption 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

928027 - CVE-2013-2266 bind: libdns regular expressions excessive resource consumption DoS

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