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From: Secunia Security Advisories <sec-adv@xxxxxxxxxxx>
To: 3APA3A@xxxxxxxxxxxxxxxx <3APA3A@xxxxxxxxxxxxxxxx>
Date: Wednesday, September 6, 2006, 1:17:51 PM
Subject: [SA21752] ISC BIND Denial of Service Vulnerabilities
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TITLE:
ISC BIND Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA21752
VERIFY ADVISORY:
CRITICAL:
Moderately critical
IMPACT:
DoS
WHERE:
>From remote
SOFTWARE:
ISC BIND 9.2.x
ISC BIND 9.3.x
DESCRIPTION:
Some vulnerabilities have been reported in BIND, which can be
exploited by malicious people to cause a DoS (Denial of Service).
1) An assertion error within the processing of SIG queries can be
exploited to crash either a recursive server when more than one
SIG(covered) Resource Record set (RRset) is returned or an
authoritative server serving a RFC 2535 DNSSEC zone where there are
multiple SIG(covered) RRsets.
2) An error within the handling of multiple recursive queries can be
exploited to trigger an INSIST failure by causing the response to the
query to arrive after all clients looking for the response have left
the recursion queue.
NOTE: According to the vendor, the vulnerabilities are likely not
exploitable in the 9.2.x branch. However, a patch has been provided.
SOLUTION:
Update to BIND 9.3.3rc2, BIND 9.3.2-P1, BIND 9.2.7rc1, or BIND
9.2.6-P1.
The vulnerabilities have also been fixed in BIND 9.4.0b2.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
OTHER REFERENCES:
US-CERT VU#697164:
US-CERT VU#915404:
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