Active Debug Code in Siemens products - CVE-2019-10939
Published: April 15, 2020
Vulnerability identifier: #VU26964
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-10939
CWE-ID: CWE-489
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain full control over the device.
The vulnerability exists due to the affected software contains an open debug port that is available under specific conditions. A remote attacker can exploit the debug port and takeover the target device.
Note: The vulnerability is only available if the IP address is configured to 192.168.1.2
Affected software
TIM 3V-IE
TIM 3V-IE Advanced
TIM 3V-IE DNP3
TIM 4R-IE
TIM 4R-IE DNP
TIM 3V-IE Advanced
TIM 3V-IE DNP3
TIM 4R-IE
TIM 4R-IE DNP
How to mitigate CVE-2019-10939
Install updates from vendor's website.
TIM 3V-IE - update to 2.8
TIM 3V-IE Advanced - update to 2.8
TIM 3V-IE DNP3 - update to 3.3
TIM 4R-IE - update to 2.8
TIM 4R-IE DNP - update to 3.3
TIM 3V-IE Advanced - update to 2.8
TIM 3V-IE DNP3 - update to 3.3
TIM 4R-IE - update to 2.8
TIM 4R-IE DNP - update to 3.3