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Date: Wed, 29 Jul 2009 17:48:19 +0400
From: Solar Designer <solar@...nwall.com>
To: oss-security@...ts.openwall.com
Subject: Re: debian bug report on bind9 DoS
On Wed, Jul 29, 2009 at 05:15:09PM +0400, Solar Designer wrote:
> Confirmed on 9.3.5-P2 (removing the "$packet->sign_tsig(...)" line from
> the exploit as above) with whatever patches we happened to have until
> this latest fix.
It gets worse: I was also able to crash named from an IP address
explicitly denied in "allow-query". I did verify that non-malicious
queries from that IP address were indeed correctly denied.
It appears that BIND does too much processing too early in the code.
Alexander
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