Vulnerability identifier: #VU62478

Vulnerability risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-42029

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
SIMATIC STEP 7 (TIA Portal)
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the engineering system software. A local administrator can bypass implemented security restrictions and gain elevated privileges on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SIMATIC STEP 7 (TIA Portal): 15.0 - 17

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-350757.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.