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Category:   Device (Firewall)  >   Barracuda NG Firewall Vendors:   Barracuda Networks
Barracuda NG Firewall SSH Login Flaw Lets Remote Users Execute Arbitrary Commands With Root Privileges
SecurityTracker Alert ID:  1025633
SecurityTracker URL:  http://securitytracker.com/id/1025633
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jun 13 2011
Impact:   Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 5.02; also phion netfence 4.0.x and 4.2 prior to 4.2.15
Description:   A vulnerability was reported in Barracuda NG Firewall. A remote user can execute arbitrary commands on the target system.

A remote user with knowledge of the administrator's username can exploit a flaw in the SSH login procedure to execute arbitrary shell commands on the target system. The commands will run with root privileges.

Systems using an external authentication method such as Active Directory are affected.

The vendor was notified on March 14, 2011.

Wolfgang Neudorfer and Lukas Nothdurfter reported this vulnerability.

Impact:   A remote user can execute arbitrary commands on the target device with root privileges.
Solution:   The vendor has issued a hotfix (on March 15, 2011):

Hotfix 392_Authentication for netfence 4.0.x
Hotfix 390_Authentication for netfence 4.2.x
Hotfix 391_Authentication for NG Firewall 5.0.x

Vendor URL:  www.barracudanetworks.com/ (Links to External Site)
Cause:   Not specified

Message History:   None.


 Source Message Contents

Subject:  phion netfence / Barracuda NG Firewall: Remote Command Execution with root Privileges

Security Advisory
---------------------------------------
Vulnerable Software:    Barracuda NG Firewall / phion netfence
Homepage:               http://www.barracudanetworks.com/
Found by:               Wolfgang Neudorfer, Lukas Nothdurfter  
Impact:                 Remote Command Execution with root Privileges
Severity:               Critical


Product Description
---------------------------------------
The Barracuda NG Firewall is a family of hardware and virtual appliances designed to protect network infrastructure, improve site-to-site connectivity and simplify administration of network operations. Beyond its powerful network firewall, IPS and VPN technologies, the Barracuda NG Firewall integrates a comprehensive set of next generation firewall technologies, including Layer 7 application control, WAN optimization, Web filtering, anti-virus, anti-spam and network access control enforcement.

[http://www.barracudanetworks.com/ns/products/ng_firewall_overview.php]


Vulnerability Description
---------------------------------------
It is possible to execute an arbitrary command with root privileges on phion netfence 4.0.x, phion netfence < 4.2.15 and NG Firewall < 5.0.2 boxes with activated external authentication scheme (i.e. Active Directory). An attacker with the knowledge of an admin's username is able to perform arbitrary shell commands during the ssh login procedure on the box. The knowledge of the admin's password is not required.


Proof-of-Concept
---------------------------------------
A proof-of-concept exploit will not be disclosed due to a responsible disclosure agreement with the vendor.


Severity
---------------------------------------
Because of the high impact and the broad range of vulnerable versions, the severity is considered to be critical.


Vulnerable Versions
---------------------------------------
phion netfence 4.0.x
phion netfence < 4.2.15
NG Firewall < 5.0.2


Patch
---------------------------------------
Hotfix 392_Authentication for netfence 4.0.x
Hotfix 390_Authentication for netfence 4.2.x
Hotfix 391_Authentication for NG Firewall 5.0.x


Contact Timeline
---------------------------------------
2011-03-14: Vendor informed
2011-03-15: Hotfixes available for download 
2011-06-11: Responsible disclosure 


References
---------------------------------------
www.monkey-cert.at
 
 


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