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

[news 28]

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

Gentoo Linux Security Advisory [uPDATE] GLSA 200804-22:03

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

http://security.gentoo.org/

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

 

Severity: Normal

Title: PowerDNS Recursor: DNS Cache Poisoning

Date: April 18, 2008

Updated: August 21, 2008

Bugs: #215567, #231335

ID: 200804-22:03

 

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

 

Update

======

 

The previous version of the PowerDNS Recursor (3.1.5) did not

properly address the issue, as UDP source port selection was

insufficiently randomized. We advise all users to upgrade to 3.1.6.

 

The updated sections appear below.

 

Affected packages

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

 

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

Package / Vulnerable / Unaffected

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

1 net-dns/pdns-recursor < 3.1.6 >= 3.1.6

 

Description

===========

 

Amit Klein of Trusteer reported that insufficient randomness is used to

calculate the TRXID values and the UDP source port numbers

(CVE-2008-1637). Thomas Biege of SUSE pointed out that a prior fix to

resolve this issue was incomplete, as it did not always enable the

stronger random number generator for source port selection

(CVE-2008-3217).

 

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.

 

Resolution

==========

 

All PowerDNS Recursor users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=net-dns/pdns-recursor-3.1.6"

 

References

==========

 

[ 1 ] CVE-2008-1637

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

[ 2 ] CVE-2008-3217

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3217

 

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