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

Vulnerability identifier: #VU61244

CSH Severity: 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-2021-42020

CWE-ID: CWE-754

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

Software vendor:
Siemens

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.

Install updates from vendor's website.

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