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Category:   Application (Generic)  >   Dnsmasq Vendors:   Kelley, Simon
Dnsmasq DNS Query Port Entropy Weakness Lets Remote Users Spoof the System
SecurityTracker Alert ID:  1020651
SecurityTracker URL:  http://securitytracker.com/id/1020651
CVE Reference:   CVE-2008-1447   (Links to External Site)
Date:  Aug 12 2008
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 2.43
Description:   A vulnerability was reported in Dnsmasq. 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:   The vendor has issued a fixed version (2.43), available at:

http://www.thekelleys.org.uk/dnsmasq/

The vendor's advisory is available at:

http://www.thekelleys.org.uk/dnsmasq/CHANGELOG

Vendor URL:  www.thekelleys.org.uk/dnsmasq/doc.html (Links to External Site)
Cause:   Randomization error
Underlying OS:   Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Aug 12 2008 (Red Hat Issues Fix) Dnsmasq DNS Query Port Entropy Weakness Lets Remote Users Spoof the System   (bugzilla@redhat.com)
Red Hat has released a fix for Red Hat Enterprise Linux 5.



 Source Message Contents

Date:  Tue, 12 Aug 2008 02:27:46 -0400
Subject:  Dnsmasq


CVE-2008-1447
 
 


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