bugtraq - Subverting BIND's SRTT Algorithm: Derandomizing NS Selection

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Message-ID: <CAA4i3gYx0Lc7A_mgDnt2x=w93Kx5QaLMBhirN2W3gpHu6qu-tQ@mail.gmail.com>
Date: Wed, 14 Aug 2013 02:04:46 -0400
From: Roee Hay <roeeh@...ibm.com>
To: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk
Subject: Subverting BIND's SRTT Algorithm: Derandomizing NS Selection

Hi,

BIND is exposed to a new vulnerability which can be exploited remotely
in order to derandomize the name server selection algorithm.
Exploitation of this vulnerability can be used in conjunction with
other off-path DNS cache poisoning exploits in order to make them more
efficient. ISC has acknowledged the vulnerability and plans to address
this deficiency by re-implementing the SRTT algorithm in future
maintenance releases of the BIND 9 code.

Important links:

1. Whitepaper: http://bit.ly/17LBSC1
2. Slides: http://bit.ly/17M3gj9
3. Blog post: http://ibm.co/17ntOIw
4. ISC's Operational Notification: http://bit.ly/1d3iR3z

-Roee