File and Directory Information Exposure in Siemens SIMATIC WinCC and SIMATIC PCS 7

1) File and Directory Information Exposure

EUVDB-ID: #VU60533

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 - File And Directory Information Exposure

Exploit availability: No

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component stores the credentials of a local system account in a potentially publicly accessible project file using an outdated cipher algorithm.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

CPE2.3

• cpe:2.3:a:siemens:simatic_pcs_7:8.0:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_pcs_7:8.1:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_pcs_7:8.2:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siemens_simatic_wincc:7.0:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siemens_simatic_wincc:7.1:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siemens_simatic_wincc:7.2:*:*:*:*:*:*:*

External links

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

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.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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