Improper validation of integrity check value in Siemens products - CVE-2021-37182

Vulnerability identifier: #VU64413

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-37182

CWE-ID: CWE-354

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Siemens

Affected software:
SCALANCE XM408-4C
SCALANCE XM408-8C
SCALANCE XM416-4C
SCALANCE XR524-8C 1x230V
SCALANCE XR524-8C 2x230V
SCALANCE XR524-8C 24V
SCALANCE XR526-8C 1x230V
SCALANCE XR526-8C 2x230V
SCALANCE XR526-8C 24V
SCALANCE XR528-6M
SCALANCE XR552-12M

The vulnerability allows a remote attacker to bypass integrity checks.

The vulnerability exists due to a weak algorithm in the OSPF protocol implementation. A remote attacker can send specially crafted OSPF packets and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://cert-portal.siemens.com/productcert/pdf/ssa-145224.pdf