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TITLE:
BIND 8 Predictable DNS Query IDs Vulnerability

SECUNIA ADVISORY ID:
SA26629

VERIFY ADVISORY:
http://secunia.com/advisories/26629/

CRITICAL:
Moderately critical

IMPACT:
Spoofing

WHERE:
>From remote

SOFTWARE:
ISC BIND 8.x.x
http://secunia.com/product/76/

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 probability to guess the next query ID is between 25%
and 43%, depending on the handled DNS traffic. 

The vulnerability is reported in BIND 8.x versions prior to 8.4.7-P1.

SOLUTION:
Update to BIND 8.4.7-P1.

NOTE: BIND 8.x has reached "End of Life". The vendor advises all
users to upgrade to BIND 9.4.1-P1.

PROVIDED AND/OR DISCOVERED BY:
Amit Klein

ORIGINAL ADVISORY:
ISC:
http://www.isc.org/index.pl?/sw/bind/bind8-eol.php

Trusteer:
http://www.trusteer.com/docs/bind8dns.html

OTHER REFERENCES:
US-CERT VU#927905:
http://www.kb.cert.org/vuls/id/927905

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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