GE has mitigations available to handle improper authorization and use of hard-coded credentials vulnerabilities in its Mark VIe Controller, according to a report with CISA.
Successful exploitation of these vulnerabilities, discovered by Sharon Brizinov of Claroty, could allow an attacker to create read/write/execute commands within the Mark VIe control system. All versions of the GE Mark VIe Controller are affected by at least one of the vulnerabilities. Some versions are affected by both. For more information contact GE.
In one vulnerability, the affected product has an unsecured Telnet protocol that may allow a user to create an authenticated session using generic default credentials.
CVE-2019-13554 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 6.3.
In addition, the affected product is shipped with pre-configured hard-coded credentials that may allow root-user access to the controller. A limited application of the affected product may ship without setup and configuration instructions immediately available to the end user. The bulk of controllers go into applications requiring the GE commissioning engineer to change default configurations during the installation process.
CVE-2019-13918 is the case number assigned to this vulnerability, which has as CVSS v3 base score of 6.8.
The product sees use mainly in the energy sector. However, it does see action on a global basis.
No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely. However, an attacker with low skill level could leverage the vulnerabilities.
GE recommends users apply the following mitigations:
• Disable the Telnet service (Telnet was enabled by default on Mark VIe controllers with versions of Control*ST earlier than v6.0)
• Reset controller passwords upon transfer of Mark VIe to the operating environment
GE Mark VIe Control system owners can request access and find instructions in GEH-6808, Control*ST Software Suite How to Guidelines.
GE Mark VIe Control system owners can reference GEH-6839, Secure Deployment Guidelines, for further instruction on security actions with installation and maintenance of their control system.
GE recommends organizations employ a defense-in-depth strategy through user authentication and authorization with features native to the control system to remediate security risk against the communication protocol vulnerabilities described.
For more information, contact GE.