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FreeBSD : FreeBSD -- bhyve(8) privileged guest escape via USB controller (4edaa9f4-6b51-11ef-9a62-002590c1f29c)

high Nessus Plugin ID 206694

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 4edaa9f4-6b51-11ef-9a62-002590c1f29c advisory.

 bhyve can be configured to emulate devices on a virtual USB controller (XHCI), such as USB tablet devices. An insufficient boundary validation in the USB code could lead to an out-of-bounds write on the heap, with data controlled by the caller.
 A malicious, privileged software running in a guest VM can exploit the vulnerability to achieve code execution on the host in the bhyve userspace process, which typically runs as root. Note that bhyve runs in a Capsicum sandbox, so malicious code is constrained by the capabilities available to the bhyve process.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?2733609b

Plugin Details

Severity: High

ID: 206694

File Name: freebsd_pkg_4edaa9f46b5111ef9a62002590c1f29c.nasl

Version: 1.1

Type: local

Published: 9/6/2024

Updated: 9/6/2024

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

Vector: CVSS2#AV:L/AC:L/Au:M/C:C/I:C/A:C

CVSS Score Source: CVE-2024-32668

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Settings/ParanoidReport, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 9/5/2024

Vulnerability Publication Date: 9/5/2024

Reference Information

CVE: CVE-2024-32668