#VU64575 Use of Client-Side Authentication in SIMATIC WinCC OA - CVE-2022-33139

Vulnerability identifier: #VU64575

Vulnerability risk: High

CVSSv4.0: 8.1 [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-2022-33139

CWE-ID: CWE-603

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC WinCC OA
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected applications use client-side only authentication when neither server-side authentication nor Kerberos authentication is enabled. A remote attacker can impersonate other users or exploit the client-server protocol without being authenticated.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SIMATIC WinCC OA: 3.16 - 3.18

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-111512.pdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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