[gentoo-announce] [ GLSA 201111-06 ] MaraDNS: Arbitrary code execution

[news 28]

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Gentoo Linux Security Advisory GLSA 201111-06

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http://security.gentoo.org/

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Severity: High

Title: MaraDNS: Arbitrary code execution

Date: November 20, 2011

Bugs: #352569

ID: 201111-06

 

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Synopsis

========

 

A buffer overflow vulnerability in MaraDNS allows remote attackers to

execute arbitrary code or cause a Denial of Service.

 

Background

==========

 

MaraDNS is a proxy DNS server with permanent caching.

 

Affected packages

=================

 

-------------------------------------------------------------------

Package / Vulnerable / Unaffected

-------------------------------------------------------------------

1 net-dns/maradns < 1.4.06 >= 1.4.06

 

Description

===========

 

A long DNS hostname with a large number of labels could trigger a

buffer overflow in the compress_add_dlabel_points() function of

dns/Compress.c.

 

Impact

======

 

A remote unauthenticated attacker could execute arbitrary code or cause

a Denial of Service.

 

Workaround

==========

 

There is no known workaround at this time.

 

Resolution

==========

 

All MaraDNS users should upgrade to the latest stable version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=net-dns/maradns-1.4.06"

 

NOTE: This is a legacy GLSA. Updates for all affected architectures are

available since February 12, 2011. It is likely that your system is

already no longer affected by this issue.

 

References

==========

 

[ 1 ] CVE-2011-0520

http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0520

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-201111-06.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

security ( -at -) gentoo.org or alternatively, you may file a bug at

https://bugs.gentoo.org.

 

License

=======

 

Copyright 2011 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