Arbitrary file overwrite in Siemens TIA Portal

1) External Control of File Name or Path

EUVDB-ID: #VU74816

Risk: High

CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-26293

CWE-ID: CWE-73 - External Control of File Name or Path

Exploit availability: No

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

External links

http://cert-portal.siemens.com/productcert/txt/ssa-116924.txt

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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