Vulnerability identifier: #VU82983

Vulnerability risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-5370

CWE-ID: CWE-1299

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FreeBSD
Operating systems & Components / Operating system

Vendor: FreeBSD Foundation

Description

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

The vulnerability exists due to a missing check for CPU 0 on AArch64 hardware when deciding whether to use the Secure Monitor Call Calling Convention (SMCCC) mechanism on a given CPU. An attacker with physical access to the system can compromise the affected system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 13.2

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External links
http://security.FreeBSD.org/advisories/FreeBSD-SA-23:14.smccc.asc

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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