Improper Check for Unusual or Exceptional Conditions in Siemens products - CVE-2021-42020

Vulnerability identifier: #VU61244

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2021-42020

CWE-ID: CWE-754

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to third-party component in its TFTP functionality fails to check for null terminations in file names. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

RUGGEDCOM ROS RSG2288
RUGGEDCOM ROS RSG2100P
RUGGEDCOM ROS RST2228
RUGGEDCOM ROS RST916P
RUGGEDCOM ROS RST916C
RUGGEDCOM ROS RSL910
RUGGEDCOM ROS RSG2488
RUGGEDCOM ROS RSG2300P
RUGGEDCOM ROS RSG2300
RUGGEDCOM ROS M2100
RUGGEDCOM ROS RSG2100P (32M)
RUGGEDCOM ROS RSG2100 (32M)
RUGGEDCOM ROS RSG920P
RUGGEDCOM ROS RSG900
RUGGEDCOM ROS RS900G (32M)
RUGGEDCOM ROS RS900G
RUGGEDCOM ROS RS416V2
RUGGEDCOM ROS RMC8388

Install updates from vendor's website.

RUGGEDCOM ROS RSG2288 - update to 5.6.0
RUGGEDCOM ROS RSG2100P - update to 5.6.0
RUGGEDCOM ROS RST2228 - update to 5.6.0
RUGGEDCOM ROS RST916P - update to 5.6.0
RUGGEDCOM ROS RST916C - update to 5.6.0
RUGGEDCOM ROS RSL910 - update to 5.6.0
RUGGEDCOM ROS RSG2488 - update to 5.6.0
RUGGEDCOM ROS RSG2300P - update to 5.6.0
RUGGEDCOM ROS RSG2300 - update to 5.6.0
RUGGEDCOM ROS M2100 - update to 5.6.0
RUGGEDCOM ROS RSG2100P (32M) - update to 5.6.0
RUGGEDCOM ROS RSG2100 (32M) - update to 5.6.0
RUGGEDCOM ROS RSG920P - update to 5.6.0
RUGGEDCOM ROS RSG900 - update to 5.6.0
RUGGEDCOM ROS RS900G (32M) - update to 5.6.0
RUGGEDCOM ROS RS900G - update to 5.6.0
RUGGEDCOM ROS RS416V2 - update to 5.6.0
RUGGEDCOM ROS RMC8388 - update to 5.6.0

• https://cert-portal.siemens.com/productcert/pdf/ssa-256353.pdf

• Multiple vulnerabilities in Siemens RUGGEDCOM ROS