#VU80749 Improper Verification of Cryptographic Signature in QMS Automotive - CVE-2023-40727

Vulnerability identifier: #VU80749

Vulnerability risk: Low

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

CVE-ID: CVE-2023-40727

CWE-ID: CWE-347

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
QMS Automotive
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to weak outdated application signing mechanism in the QMS.Mobile module. A local user can tamper the application code.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

QMS Automotive: before 12.39

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-147266.pdf

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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.