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Category:   Device (VoIP/Phone/FAX)  >   Nortel Business Communications Manager Vendors:   Nortel
Nortel Business Communications Manager DNS Query Port Entropy Weakness Lets Remote Users Spoof the System
SecurityTracker Alert ID:  1020802
SecurityTracker URL:  http://securitytracker.com/id/1020802
CVE Reference:   CVE-2008-1447   (Links to External Site)
Date:  Sep 3 2008
Impact:   Modification of system information
Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 4.0
Description:   A vulnerability was reported in Nortel Business Communications Manager. 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.

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:   No solution was available at the time of this entry.

The vendor is working on a fix.

The vendor's advisory is available at:

http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=762152

Vendor URL:  support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=762152 (Links to External Site)
Cause:   Randomization error

Message History:   None.


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