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Category:   Device (Firewall)  >   WatchGuard Firebox Vendors:   WatchGuard
WatchGuard Firebox XML-RPC Agent Bugs Let Remote Users Determine Validation Usernames and Deny Service on the Target System
SecurityTracker Alert ID:  1038274
SecurityTracker URL:  http://securitytracker.com/id/1038274
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Apr 17 2017
Impact:   Denial of service via network, Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 11.12.1 and prior
Description:   Two vulnerabilities were reported in WatchGuard Firebox. A remote user can cause denial of service conditions on the target system. A remote user can determine valid usernames on the target system.

A remote user can send multiple requests with specially crafted XML data that references an external entity to cause the target XML-RPC agent to crash or degrade performance. As a result, the web user interface may become unavailable for 10 minutes and traffic traversing the firewall may be disrupted or slowed.

The XML-RPC agent returns different responses to authentication requests depending on whether the username exists on the system or not. A remote user can send a specially crafted request to the target XML-RPC agent to determine valid usernames on the target system.

The original advisory is available at:

https://www.sidertia.com/Home/Community/Blog/2017/04/17/Fixed-the-Fireware-Vulnerabilities-discovered-by-Sidertia

David Fernandez of Sidertia Solutions reported these vulnerabilities.

Impact:   A remote user can cause the web user interface to become unavailable and traffic traversing the firewall to be disrupted or slowed.

A remote user can determine valid usernames on the target system.

Solution:   The vendor has issued a fix (11.12.2).

The vendor advisory is available at:

https://www.watchguard.com/support/release-notes/fireware/11/en-US/EN_ReleaseNotes_Fireware_11_12_2/index.html#Fireware/en-US/resolved_issues.html%3FTocPath%3D_____13

Vendor URL:  www.watchguard.com/support/release-notes/fireware/11/en-US/EN_ReleaseNotes_Fireware_11_12_2/ (Links to External Site)
Cause:   Access control error, State error

Message History:   None.


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