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Red Hat: RHSA-2016:1945-01 Important: bind97 DoS Attack Mitigation

red hat
Calendar Grey September 28, 2016
Scroller Redhat
Crucial bind97 patch for Red Hat Enterprise Linux 5 addresses denial of service vulnerability and strengthens overall security.
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 constructed a response to a query that met certain criteria. A remote attacker could use this flaw to make named exit unexpectedly with an assertion failure via a specially crafted DNS request packet. (CVE-2016-2776)
Red Hat would like to thank ISC for reporting this issue.

Topics%20covered

Topics Covered

security advisory red hat security fix important dos bind97 red hat advisory

References

https://access.redhat.com/security/cve/CVE-2016-2776 https://access.redhat.com/security/updates/classification/#important https://kb.isc.org/docs/aa-01419

Package List

Red Hat Enterprise Linux Desktop Workstation (v. 5 client):
Source: bind97-9.7.0-21.P2.el5_11.7.src.rpm
i386: bind97-9.7.0-21.P2.el5_11.7.i386.rpm bind97-chroot-9.7.0-21.P2.el5_11.7.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.7.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.7.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.7.i386.rpm bind97-utils-9.7.0-21.P2.el5_11.7.i386.rpm
x86_64: bind97-9.7.0-21.P2.el5_11.7.x86_64.rpm bind97-chroot-9.7.0-21.P2.el5_11.7.x86_64.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.7.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.7.x86_64.rpm bind97-devel-9.7.0-21.P2.el5_11.7.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.7.x86_64.rpm bind97-libs-9.7.0-21.P2.el5_11.7.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.7.x86_64.rpm bind97-utils-9.7.0-21.P2.el5_11.7.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source: bind97-9.7.0-21.P2.el5_11.7.src.rpm
i386: bind97-9.7.0-21.P2.el5_11.7.i386.rpm bind97-chroot-9.7.0-21.P2.el5_11.7.i386.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.7.i386.rpm bind97-devel-9.7.0-21.P2.el5_11.7.i386.rpm bind97-libs-9.7.0-21.P2.el5_11.7.i386.rpm bind97-utils-9.7.0-21.P2.el5_11.7.i386.rpm
ia64: bind97-9.7.0-21.P2.el5_11.7.ia64.rpm bind97-chroot-9.7.0-21.P2.el5_11.7.ia64.rpm bind97-debuginfo-9.7.0-21.P2.el5_11.7.ia64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:1945-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1945.html
Issue date: 2016-09-28

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 red hat security fix important dos bind97 red hat advisory

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

1378380 - CVE-2016-2776 bind: assertion failure in buffer.c while building responses to a specifically constructed request

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