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

Vulnerability identifier: #VU64413

CSH Severity: Medium

CVSS v4: 8.2 [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]

CVE-ID: CVE-2021-37182

CWE-ID: CWE-354

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

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

Install updates from vendor's website.

SCALANCE XM408-4C - update to 6.5
SCALANCE XM408-8C - update to 6.5
SCALANCE XM416-4C - update to 6.5
SCALANCE XR524-8C 1x230V - update to 6.5
SCALANCE XR524-8C 2x230V - update to 6.5
SCALANCE XR524-8C 24V - update to 6.5
SCALANCE XR526-8C 1x230V - update to 6.5
SCALANCE XR526-8C 2x230V - update to 6.5
SCALANCE XR526-8C 24V - update to 6.5
SCALANCE XR528-6M - update to 6.5
SCALANCE XR552-12M - update to 6.5

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

• Improper validation of integrity check value in Siemens SCALANCE XM-400 and XR-500 Devices