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ESB-2014.0456 - [Appliance] FortiBalancer: Unauthorised access - Remote/unauthenticated

Date: 07 April 2014

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.0456
                  FortiBalancer Remote SSH Vulnerability
                               7 April 2014

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           FortiBalancer
Publisher:         Fortiguard
Operating System:  Network Appliance
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-2723 CVE-2014-2722 CVE-2014-2721

Original Bulletin: 
   http://www.fortiguard.com/advisory/FG-IR-14-010/

- --------------------------BEGIN INCLUDED TEXT--------------------

FortiBalancer Remote SSH Vulnerability

Info

Risk			5 Critical 
Date			Apr 02 2014
Impact			Remote Access
CVE ID			CVE-2014-2721 password issue,
			CVE-2014-2722 key issue,
			CVE-2014-2723 permission issue
Fixed In Firmware	No patched firmware available at this time.

A platform-specific remote access vulnerability has been discovered that may 
allow a remote user to gain privileged access to affected systems using SSH. 
The vulnerability is caused by a configuration error, and is not the result 
of an underlying SSH defect.

Impact

Privileged access may be granted to unauthenticated users.

Affected Products

FortiBalancer 400, 1000, 2000 and 3000.
All software versions are affected.

Solutions

Apply the patch provided on the Fortinet Support site, or use one of the 
workarounds shown below. The patch and supporting documentation are available 
in the FortiBalancer firmware download directory, accessible from 
https://support.fortinet.com. The following files are available: 

FortiBalancer-Component-Patch.pdf - Installation Instructions
FBLOS-FortiBalancer-Patch-2014_02.fn - System patch

Other Workarounds: 

1. Disable SSH on the Web UI via Admin Tools -> System Management. 
Uncheck "enable SSH access" and click "save changes" on the top right. 

2. Disable SSH in the console via: 

config t
ssh off
write memory
exit

3. Use Webwall rules in order to block TCP port 22 destined to the load 
balancer external IP address: 

config t
accesslist deny tcp 0.0.0.0 0.0.0.0 0 <external-ip-address> 255.255.255.255 22 100
accesslist permit tcp 0.0.0.0 0.0.0.0 0 0.0.0.0 0.0.0.0 0 100
accessgroup 100 <external-port>
webwall <external-port> on
write memory
exit

4. Use a firewall to block TCP port 22 access to the FortiBalancer.

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
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