Improper access control in Siemens SIMATIC WinCC and SIMATIC PCS 7 - CVE-2019-10922

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Main Vulnerability Database Vulnerabilities #VU18656

Improper access control in Siemens SIMATIC WinCC and SIMATIC PCS 7 - CVE-2019-10922

Published: May 31, 2019


Vulnerability identifier: #VU18656
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-10922
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Siemens
Affected software:
Siemens SIMATIC WinCC
SIMATIC PCS 7

Detailed vulnerability description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions when installations have not “Encrypted Communication” configured. A remote unauthenticated attacker with network access may be able to execute arbitrary code.


How to mitigate CVE-2019-10922

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

A vendor recommends to:
  • Upgrade SIMATIC WinCC to v7.3 or newer.
  • Upgrade SIMATIC PCS 7 to v8.1 or newer.
  • Enable Encrypted Communications (some newer versions have this enabled by default).
  • Apply defense-in-depth concepts.


Sources