[gentoo-announce] [ GLSA 200804-22 ] PowerDNS Recursor: DNS Cache Poisoning

[news 28]

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Gentoo Linux Security Advisory GLSA 200804-22

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http://security.gentoo.org/

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Severity: Normal

Title: PowerDNS Recursor: DNS Cache Poisoning

Date: April 18, 2008

Bugs: #215567

ID: 200804-22

 

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Synopsis

========

 

Use of insufficient randomness in PowerDNS Recursor might lead to DNS

cache poisoning.

 

Background

==========

 

The PowerDNS Recursor is an advanced recursing nameserver.

 

Affected packages

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

 

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

Package / Vulnerable / Unaffected

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

1 net-dns/pdns-recursor < 3.1.5 >= 3.1.5

 

Description

===========

 

Amit Klein of Trusteer reported that insufficient randomness is used to

calculate the TRXID values and the UDP source port numbers.

 

Impact

======

 

A remote attacker could send malicious answers to insert arbitrary DNS

data into the cache. These attacks would in turn help an attacker to

perform man-in-the-middle and site impersonation attacks.

 

Workaround

==========

 

There is no known workaround at this time.

 

Resolution

==========

 

All PowerDNS Recursor users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=net-dns/pdns-recursor-3.1.5"

 

References

==========

 

[ 1 ] CVE-2008-1637

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1637

 

Availability

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

 

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

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-200804-22.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

http://bugs.gentoo.org.

 

License

=======

 

Copyright 2008 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