#VU94200 Deserialization of Untrusted Data in Totally Integrated Automation Portal (TIA Portal) and SIMATIC STEP 7 Safety - CVE-2023-32737

Vulnerability identifier: #VU94200

Vulnerability risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-32737

CWE-ID: CWE-502

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Totally Integrated Automation Portal (TIA Portal)
Other software / Other software solutions
SIMATIC STEP 7 Safety
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data within the .NET BinaryFormatter. A local administrator can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Totally Integrated Automation Portal (TIA Portal): before 18

SIMATIC STEP 7 Safety: before 18

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External links
https://cert-portal.siemens.com/productcert/html/ssa-313039.html

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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.