#VU74816 External Control of File Name or Path in TIA Portal - CVE-2023-26293

Vulnerability identifier: #VU74816

Vulnerability risk: High

CVSSv4.0: 5.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-26293

CWE-ID: CWE-73

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TIA Portal
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to create or overwrite arbitrary files.

The vulnerability exists due to improper input validation of path names inside PC system configuration files. A remote attacker can trick the victim to open a specially crafted PC system configuration file and create or overwrite arbitrary files on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TIA Portal: 15 - 18

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External links
https://cert-portal.siemens.com/productcert/txt/ssa-116924.txt

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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