#VU60532 Memory leak in Siemens products - CVE-2021-37205

Vulnerability identifier: #VU60532

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-37205

CWE-ID: CWE-401

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
SIMATIC ET 200SP Open Controller CPU 1515SP PC2
SIMATIC S7-1500 Software Controller
SIMATIC S7-PLCSIM Advanced
SIMATIC S7-1200 CPU family
SIMATIC S7-1500 CPU
SIMATIC Drive Controller
SIMATIC TIM 1531 IRC

Software vendor:
Siemens

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in a PLC. A remote attacker can force the application to leak memory and perform denial of service attack.

Install updates from vendor's website.

• https://cert-portal.siemens.com/productcert/pdf/ssa-838121.pdf