Internet Systems Consortium Security Advisory.

Mark Andrews Mark_Andrews at isc.org
Thu Jan 25 00:23:26 UTC 2007


                Internet Systems Consortium Security Advisory.
		   BIND 9: dereferencing freed fetch context
                             12 January 2007

Versions affected:

	BIND 9.3.0, 9.3.1, 9.3.2, 9.3.3
        BIND 9.4.0a1, 9.4.0a2, 9.4.0a3, 9.4.0a4, 9.4.0a5, 9.4.0a6, 9.4.0b1
	     9.4.0b2, 9.4.0b3, 9.4.0b4, 9.4.0rc1 
	BIND 9.5.0a1 (Bind Forum only)

Severity: Low
Exploitable: Remotely

Description:

	It is possible for the named to dereference (read) a freed
	fetch context.  This can cause named to exit unintentionally.

Workaround:

	Disable / restrict recursion (to limit exposure).

Fix:

	Upgrade to BIND 9.2.8, BIND 9.3.4 or BIND 9.4.0rc2.
	Additionally this will be fixed in the upcoming BIND 9.5.0a2.

Revision History:



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