Information disclosure in Siemens SIMATIC WinCC and SIMATIC PCS 7



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-40360
CWE-ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
 SIMATIC PCS 7
Server applications / SCADA systems

Siemens SIMATIC WinCC
Server applications / SCADA systems

Vendor Siemens

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU60534

Risk: Low

CVSSv4.0: 3.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-40360

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to excessive data output by the application. A remote authenticated attacker can brute force the password hash and use it to login to the server.

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 External links

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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

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.

Is there known malware, which exploits this vulnerability?

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



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