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Category:   Device (Firewall)  >   Juniper ScreenOS Vendors:   Juniper
Juniper ScreenOS DNS Query Port Entropy Weakness Lets Remote Users Spoof the System
SecurityTracker Alert ID:  1020448
SecurityTracker URL:  http://securitytracker.com/id/1020448
CVE Reference:   CVE-2008-1447   (Links to External Site)
Date:  Jul 9 2008
Impact:   Modification of system information
Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Juniper NetScreen ScreenOS. 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.

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:   It is unclear if a fix is available or not.

The vendor's advisory is available at:

https://www.juniper.net/alerts/viewalert.jsp?actionBtn=Search&txtAlertNumber=PSN-2008-06-040&viewMode=view

Vendor URL:  www.juniper.net/alerts/viewalert.jsp?actionBtn=Search&txtAlertNumber=PSN-2008-06-040&viewMode=view (Links to External Site)
Cause:   Randomization error

Message History:   None.


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