Problemi nastaju zbog nepravilnog rukovanja zapisima nulte duljine RDATA sekcije, neispravne incijalizacije pričuvne memorije te zbog neodgovarajuće ns_client strukture.
Posljedica:
Zlonamjerni korisnik mogao je iskoristiti propuste kako bi doveo do uskraćivanja usluge.
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Gentoo Linux Security Advisory GLSA 201209-04
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http://security.gentoo.org/
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Severity: Normal
Title: BIND: Multiple vulnerabilities
Date: September 24, 2012
Bugs: #402661, #419637, #427966, #434876
ID: 201209-04
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Synopsis
========
Multiple vulnerabilities have been found in BIND, the worst of which
may allow remote Denial of Service.
Background
==========
BIND is the Berkeley Internet Name Domain Server.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-dns/bind < 9.9.1_p3 >= 9.9.1_p3
Description
===========
Multiple vulnerabilities have been discovered in BIND:
* Domain names are not properly revoked due to an error in the cache
update policy (CVE-2012-1033).
* BIND accepts records with zero-length RDATA fields (CVE-2012-1667).
* An assertion failure from the failing-query cache could occur when
DNSSEC validation is enabled (CVE-2012-3817).
* A memory leak may occur under high TCP query loads (CVE-2012-3868).
* An assertion error can occur when a query is performed for a record
with RDATA greater than 65535 bytes (CVE-2012-4244).
Impact
======
A remote attacker may be able to cause a Denial of Service condition or
keep domain names resolvable after it has been deleted from
registration.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All BIND users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/bind-9.9.1_p3"
References
==========
[ 1 ] CVE-2012-1033
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1033
[ 2 ] CVE-2012-1667
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1667
[ 3 ] CVE-2012-3817
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3817
[ 4 ] CVE-2012-3868
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3868
[ 5 ] CVE-2012-4244
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4244
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-201209-04.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
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https://bugs.gentoo.org.
License
=======
Copyright 2012 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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