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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
(OpenBSD Issues Fix) BIND Dynamic Update Bug in dns_db_findrdataset() Lets Remote Users Deny Service
SecurityTracker Alert ID:  1022620
SecurityTracker URL:  http://securitytracker.com/id/1022620
CVE Reference:   CVE-2009-0696   (Links to External Site)
Date:  Jul 29 2009
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.4 prior to 9.4.3-P3, 9.5 prior to 9.5.1-P3, 9.6 prior to 9.6.1-P1
Description:   A vulnerability was reported in BIND. A remote user can cause denial of service conditions.

A remote user can send a specially crafted dynamic update message to a target DNS server that is a master for one or more DNS zones to cause the target DNS service to crash. Slave zones are not affected.

The flaw resides in dns_db_findrdataset() in 'db.c'.

This vulnerability is being actively exploited.

Matthias Urlichs reported this vulnerability.

Impact:   A remote user can cause the target DNS service to crash.
Solution:   OpenBSD has issued a fix.

ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.6/common/001_bind.patch
ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.5/common/007_bind.patch
ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.4/common/014_bind.patch

The OpenBSD advisory is available at:

http://openbsd.org/errata46.html

Vendor URL:  www.isc.org/node/474 (Links to External Site)
Cause:   State error
Underlying OS:  UNIX (OpenBSD)

Message History:   This archive entry is a follow-up to the message listed below.
Jul 29 2009 BIND Dynamic Update Bug in dns_db_findrdataset() Lets Remote Users Deny Service



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