SB2021081103 - Improper Authentication in Siemens SIMATIC S7-1200
Published: August 11, 2021
Security Bulletin ID
SB2021081103
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2021-37172)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to the affected devices fail to authenticate against configured passwords when provisioned using TIA Portal v13. A remote attacker can bypass authentication and download arbitrary programs to the PLC.
Remediation
Install update from vendor's website.