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Vulnerability Assessment Details

DNS Cache Snooping

Vulnerability Assessment Summary
DNS Cache Snooping

Detailed Explanation for this Vulnerability Assessment

Summary :

Remote DNS server is vulnerable to Cache Snooping attacks.

Description :

The remote DNS server answers to queries for third party domains which do
not have the recursion bit set.

This may permit a remote attacker to acertain which domains have recently
been resolved via this name server, and therefore which hosts have been
recently visited.

For instance, if a possible hacker was interested in whether your company utilizes
the online services of a particular financial institution, they would
be able to use this attack to build a statistical model regarding
company usage of aforementioned financial institution. Of course,
the attack can also be used to find B2B partners, web-surfing patterns,
external mail servers, and more...

For a much more detailed discussion of the potential risks of permiting
DNS cache information to be queried anonymously, please see:
http://community.sidestep.pt/~luis/DNS-Cache-Snooping/DNS_Cache_Snooping_1.1.pdf

Network Security Threat Level:

Low / CVSS Base Score : 2
(AV:R/AC:L/Au:NR/C:P/A:N/I:N/B:N)

Networks Security ID:

Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security

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