#VU83229 Improper access control in Siemens COMOS - CVE-2023-43505

Vulnerability identifier: #VU83229

Vulnerability risk: Medium

CVSSv4.0: 6.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-43505

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Siemens COMOS
Other software / Other software solutions

Vendor: Siemens

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in SMB shares. A remote user can bypass implemented security restrictions and gain unauthorized access to arbitrary files.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Siemens COMOS: All versions

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External links
https://cert-portal.siemens.com/productcert/txt/ssa-137900.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.