Input validation error in Siemens products - CVE-2021-44694
Published: December 15, 2022
Vulnerability identifier: #VU70375
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-44694
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote administrator can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Affected software
SIMATIC ET 200SP Open Controller CPU 1515SP PC2
SIMATIC S7-PLCSIM Advanced
SIMATIC S7-1500
TIM 1531 IRC
SIPLUS TIM 1531 IRC
SIMATIC Drive Controller
SIMATIC S7-1500 CPU
SIMATIC S7-1200 CPU family
SIMATIC S7-PLCSIM Advanced
SIMATIC S7-1500
TIM 1531 IRC
SIPLUS TIM 1531 IRC
SIMATIC Drive Controller
SIMATIC S7-1500 CPU
SIMATIC S7-1200 CPU family
How to mitigate CVE-2021-44694
Install updates from vendor's website.
SIMATIC Drive Controller - update to 3.0.1
SIMATIC S7-1500 CPU - update to 3.0.1
SIMATIC S7-1200 CPU family - update to 4.6.0
SIMATIC S7-PLCSIM Advanced - update to 5.0
SIMATIC S7-1500 CPU - update to 3.0.1
SIMATIC S7-1200 CPU family - update to 4.6.0
SIMATIC S7-PLCSIM Advanced - update to 5.0