#VU60533 File and Directory Information Exposure in SIMATIC PCS 7 and Siemens SIMATIC WinCC - CVE-2021-40363

Vulnerability identifier: #VU60533

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-40363

CWE-ID: CWE-538

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
SIMATIC PCS 7
Server applications / SCADA systems
Siemens SIMATIC WinCC
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the affected component stores the credentials of a local system account in a potentially publicly accessible project file using an outdated cipher algorithm. A local user can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SIMATIC PCS 7: 8.0 - 9.1

Siemens SIMATIC WinCC: 7.0 - 17

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-914168.pdf

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.