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FreeBSD : FreeBSD -- Multiple issues in ctl(4) CAM Target Layer (9bd5e47b-6b50-11ef-9a62-002590c1f29c)

high Nessus Plugin ID 206690

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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 multiple vulnerabilities as referenced in the 9bd5e47b-6b50-11ef-9a62-002590c1f29c advisory.

 Several vulnerabilities were found in the ctl subsystem.
 The function ctl_write_buffer incorrectly set a flag which resulted in a kernel Use-After-Free when a command finished processing (CVE-2024-45063). The ctl_write_buffer and ctl_read_buffer functions allocated memory to be returned to userspace, without initializing it (CVE-2024-8178). The ctl_report_supported_opcodes function did not sufficiently validate a field provided by userspace, allowing an arbitrary write to a limited amount of kernel help memory (CVE-2024-42416). The ctl_request_sense function could expose up to three bytes of the kernel heap to userspace (CVE-2024-43110).
 Guest virtual machines in the bhyve hypervisor can send SCSI commands to the corresponding kernel driver via the virtio_scsi interface.
 This provides guests with direct access to the vulnerabilities covered by this advisory.
 The CAM Target Layer iSCSI target daemon ctld(8) accepts incoming iSCSI connections, performs authentication and passes connections to the kernel ctl(4) target layer.
 Malicious software running in a guest VM that exposes virtio_scsi can exploit the vulnerabilities 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.
 A malicious iSCSI initiator could achieve remote code execution on the iSCSI target host.

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

Note that Nessus has not tested for these issues 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?52cebf51

Plugin Details

Severity: High

ID: 206690

File Name: freebsd_pkg_9bd5e47b6b5011ef9a62002590c1f29c.nasl

Version: 1.2

Type: local

Published: 9/6/2024

Updated: 9/26/2024

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2024-8178

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:freebsd-kernel, 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-2024-42416, CVE-2024-43110, CVE-2024-8178

IAVA: 2024-A-0545-S