#VU84426 Improper Certificate Validation in SINEC INS - CVE-2023-48427

Vulnerability identifier: #VU84426

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-48427

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SINEC INS
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper certificate validation of the configured UMC server. A remote attacker can intercept credentials that are sent to the UMC server and manipulate responses, leading to privilege escalation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SINEC INS: before 1.0

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-077170.pdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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