Sicherheit: Denial of Service in BIND

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From: Aaron Bauman <bman@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Message-ID: <04dae16a-cd76-5a78-3775-61c38f8c8262@gentoo.org>
Subject: [ GLSA 201701-26 ] BIND: Denial of Service

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Gentoo Linux Security Advisory GLSA 201701-26
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https://security.gentoo.org/
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Severity: Normal
Title: BIND: Denial of Service
Date: January 11, 2017
Bugs: #598750
ID: 201701-26

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Synopsis
========

A vulnerability in BIND might allow remote attackers to cause a Denial
of Service condition.

Background
==========

BIND (Berkeley Internet Name Domain) is a Name Server.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-dns/bind < 9.10.4_p4 >= 9.10.4_p4

Description
===========

A defect in BIND's handling of responses containing a DNAME answer can
cause a resolver to exit after encountering an assertion failure in
db.c or resolver.c.

Impact
======

A remote attacker could send a specially crafted DNS request to the
BIND resolver possibly resulting in a Denial of Service condition.

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-9.10.4_p4"

References
==========

[ 1 ] CVE-2016-8864
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-8864

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/201701-26

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
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2017 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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Gentoo Linux Security Advisory GLSA 201701-26
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<a
class=3D"moz-txt-link-freet=
ext" href=3D"https://security.gentoo.org/">https://security.gentoo.org/</=
a>
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Severity: Normal
Title: BIND: Denial of Service
Date: January 11, 2017
Bugs: #598750
ID: 201701-26

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Synopsis
=3D=3D=3D=3D=3D=3D=3D=3D

A vulnerability in BIND might allow remote attackers to cause a Denial
of Service condition.

Background
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

BIND (Berkeley Internet Name Domain) is a Name Server.

Affected packages
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-dns/bind < 9.10.4_p4 >=3D
9.10.=
4_p4=20

Description
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

A defect in BIND's handling of responses containing a DNAME answer can
cause a resolver to exit after encountering an assertion failure in
db.c or resolver.c.

Impact
=3D=3D=3D=3D=3D=3D

A remote attacker could send a specially crafted DNS request to the
BIND resolver possibly resulting in a Denial of Service condition.

Workaround
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

There is no known workaround at this time.

Resolution
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

All BIND users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=3Dnet-dns/bind-9.10.4_p4"

References
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

[ 1 ] CVE-2016-8864
<a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.=
cfm?cvename=3DCVE-2016-8864">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20=
16-8864</a>

Availability
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

<a class=3D"moz-txt-link-freetext" href=3D"https://security.gentoo.org/g=
lsa/201701-26">https://security.gentoo.org/glsa/201701-26</a>

Concerns?
=3D=3D=3D=3D=3D=3D=3D=3D=3D

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
<a class=3D"moz-txt-link-abbreviated"
href=3D"mailto:security@gentoo.org"=
>security@gentoo.org</a> or alternatively, you may file a bug at
<a class=3D"moz-txt-link-freetext" href=3D"https://bugs.gentoo.org">https=
://bugs.gentoo.org</a>.

License
=3D=3D=3D=3D=3D=3D=3D

Copyright 2017 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.

<a class=3D"moz-txt-link-freetext" href=3D"http://creativecommons.org/lic=
enses/by-sa/2.5">http://creativecommons.org/licenses/by-sa/2.5</a></pre>
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