From: Mark Andrews (Mark_Andrewsisc.org)
Date: Wed Jan 24 2007 - 18:23:26 CST

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                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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