#VU65263 Missing Authentication for Critical Function in Siemens products - CVE-2022-33138

Vulnerability identifier: #VU65263

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-33138

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC MV540 H
Hardware solutions / Firmware
SIMATIC MV540 S
Hardware solutions / Firmware
SIMATIC MV550 H
Hardware solutions / Firmware
SIMATIC MV550 S
Hardware solutions / Firmware
SIMATIC MV560 U
Hardware solutions / Firmware
SIMATIC MV560 X
Hardware solutions / Firmware

Vendor: Siemens

Description

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

The vulnerability exists due to missing authentication for several web API endpoints. A remote attacker can read and download data from the device.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SIMATIC MV540 H: before 3.3

SIMATIC MV540 S: before 3.3

SIMATIC MV550 H: before 3.3

SIMATIC MV550 S: before 3.3

SIMATIC MV560 U: before 3.3

SIMATIC MV560 X: before 3.3

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-348662.pdficsa-22-195-03

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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.