Vulnerability identifier: #VU28929

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-2020-7456

CWE-ID: CWE-399

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 escalate privileges on the system.

The vulnerability exists due to improper management of internal resources. The the push/pop level is not restored within the processing of the same HID item, an invalid memory location may be used for subsequent HID item processing. An attacker with physical access to a USB port may be able to use a specially crafted USB device to gain kernel or user-space code execution.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 11.0 - 12.1

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External links
http://security.FreeBSD.org/advisories/FreeBSD-SA-20:17.usb.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.