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BIND Predictable DNS Query IDs Vulnerability
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Secunia Advisory:
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SA26152
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Release Date:
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2007-07-24
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Last Update:
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2007-08-28
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Popularity:
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13,368 views
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Critical:
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Moderately critical
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Impact:
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Spoofing
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | ISC BIND 9.2.x
ISC BIND 9.3.x
ISC BIND 9.4.x
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2007-2926
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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
Changelog:
2007-07-30: Added link to US-CERT.
2007-08-28: Minor corrections.
Original Advisory:
ISC:
http://www.isc.org/index.pl?/sw/bind/bind-security.php
Tusteer:
http://www.trusteer.com/docs/bind9dns_s.html
Other References:
US-CERT VU#252735:
http://www.kb.cert.org/vuls/id/252735
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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