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Moderately critical

BIND Predictable DNS Query IDs Vulnerability

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Release Date:  2007-07-24    Last Update:  2007-08-28    Views:  22,441

Secunia Advisory SA26152

Where:

From remote

Impact:

Spoofing

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Amit Klein has reported a vulnerability in BIND, which can be exploited by malicious people to poison the DNS cache.

The vulnerability is caused due to predictable query IDs in outgoing queries (e.g. if BIND works as resolver or when sending NOTIFYs to slaves) and can be exploited to poison the DNS cache when the query ID is guessed.

Reportedly, the chance to guess the next query ID for 50% of the queries (if the query ID is even) is 1 to 8.

The vulnerability is reported in the following versions:
* BIND 9.0 (all versions)
* BIND 9.1 (all versions)
* BIND 9.2.0, 9.2.1, 9.2.2, 9.2.3, 9.2.4, 9.2.5, 9.2.6, 9.2.7, 9.2.8
* BIND 9.3.0, 9.3.1, 9.3.2, 9.3.3, 9.3.4
* BIND 9.4.0, 9.4.1
* BIND 9.5.0a1, 9.5.0a2, 9.5.0a3, 9.5.0a4, 9.5.0a5


Solution:
Update to BIND 9.2.8-P1, BIND 9.3.4-P1, BIND 9.4.1-P1.

Provided and/or discovered by:
Amit Klein

Original Advisory:
ISC:
http://www.isc.org/index.pl?/sw/bind/bind-security.php

Tusteer:
http://www.trusteer.com/docs/bind9dns_s.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: BIND Predictable DNS Query IDs Vulnerability

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