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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
(Apple Issues Fix) BIND DNS Query Port Entropy Weakness Lets Remote Users Spoof the System
SecurityTracker Alert ID:  1020591
SecurityTracker URL:  http://securitytracker.com/id/1020591
CVE Reference:   CVE-2008-1447   (Links to External Site)
Date:  Aug 1 2008
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.x
Description:   A vulnerability was reported in BIND. A remote user can spoof the system.

The domain name system (DNS) service does not use sufficiently random UDP sockets to process queries. A remote user can send specially crafted DNS queries and responses to the target service to spoof responses and insert records into the DNS cache. This may cause traffic to be redirected to arbitrary IP addresses specified by the remote user.

The vendor indicates that the vulnerability exists in the DNS protocol itself, rather than in any particular vendor's implementation.

Systems using BIND as a caching resolver are affected.

Some demonstration exploit code is available at:

http://www.caughq.org/exploits/CAU-EX-2008-0002.txt
http://www.caughq.org/exploits/CAU-EX-2008-0003.txt

Dan Kaminsky of IOActive reported this vulnerability.
Impact:   A remote user can spoof the DNS service, causing traffic to be redirected to arbitrary hosts.
Solution:   Apple has issued a fix (Security Update 2008-005), which can be downloaded and installed via Software Update preferences, or from Apple Downloads at:

http://www.apple.com/support/downloads/

The Apple advisory is available at:

http://support.apple.com/kb/HT2647
Vendor URL:  www.isc.org/index.pl?/sw/bind/index.php (Links to External Site)
Cause:   Randomization error
Underlying OS:   UNIX (OS X)

Message History:   This archive entry is a follow-up to the message listed below.
Jul 8 2008 BIND DNS Query Port Entropy Weakness Lets Remote Users Spoof the System


 Source Message Contents
Date:  Thu, 31 Jul 2008 22:37:21 -0400
Subject:  Apple



http://support.apple.com/kb/HT2647

Security Update 2008-005

      BIND

      CVE-ID: CVE-2008-1447

      Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.4, Mac OS X Server v10.5.4


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