Deserialization of Untrusted Data in Siemens STEP 7 Safety and Totally Integrated Automation Portal

1) Deserialization of Untrusted Data

EUVDB-ID: #VU94200

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-32737

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

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 Update 2

SIMATIC STEP 7 Safety: before 18 Update 2

External links

http://cert-portal.siemens.com/productcert/html/ssa-313039.html

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.