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TITLE:
ISC BIND DNSSEC Cache Poisoning Vulnerability

SECUNIA ADVISORY ID:
SA37426

VERIFY ADVISORY:
http://secunia.com/advisories/37426/

DESCRIPTION:
A vulnerability has been reported in ISC BIND, which can be exploited
by malicious people to poison the DNS cache.

The vulnerability is caused due to BIND caching records from the data
section of a response without proper DNSSEC verification when
resolving recursive client requests with checking disabled (CD), but
asking for DNSSEC records (DO).

Successful exploitation requires that recursive queries are enabled
and that the nameserver performs DNSSEC validation for its clients.
Authoritative-only nameservers are not affected.

The vulnerability is reported in versions 9.0.x, 9.1.x, 9.2.x, 9.3.x,
9.4.0 through 9.4.3-P3, 9.5.0, 9.5.1, 9.5.2, 9.6.0, and 9.6.1-P1.

SOLUTION:
Update to version 9.4.3-P4, 9.5.2-P1, or 9.6.1-P2.
https://www.isc.org/downloadables/11

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Michael Sinatra, UC Berkeley.

ORIGINAL ADVISORY:
https://www.isc.org/node/504

OTHER REFERENCES:
US-CERT VU#418861:
http://www.kb.cert.org/vuls/id/418861

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