FreeBSD : FreeBSD -- Buffer overflow in some filesystems via NFS (ab0cbe3f-debc-11ef-87ba-002590c1f29c)

medium Nessus Plugin ID 214813

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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 ab0cbe3f-debc-11ef-87ba-002590c1f29c advisory.

In order to export a file system via NFS, the file system must define a file system identifier (FID) for all exported files. Each FreeBSD file system implements operations to translate between FIDs and vnodes, the kernel's in-memory representation of files. These operations are VOP_VPTOFH(9) and VFS_FHTOVP(9).
On 64-bit systems, the implementation of VOP_VPTOFH() in the cd9660, tarfs and ext2fs filesystems overflows the destination FID buffer by 4 bytes, a stack buffer overflow.
A NFS server that exports a cd9660, tarfs, or ext2fs file system can be made to panic by mounting and accessing the export with an NFS client. Further exploitation (e.g., bypassing file permission checking or remote kernel code execution) is potentially possible, though this has not been demonstrated. In particular, release kernels are compiled with stack protection enabled, and some instances of the overflow are caught by this mechanism, causing a panic.

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.

Plugin Details

Severity: Medium

ID: 214813

File Name: freebsd_pkg_ab0cbe3fdebc11ef87ba002590c1f29c.nasl

Version: 1.2

Type: local

Family: FreeBSD Local Security Checks

Published: 1/30/2025

Updated: 2/6/2025

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2025-0373

CVSS v3

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/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: Settings/ParanoidReport, Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 1/30/2025

Vulnerability Publication Date: 1/30/2025

Reference Information

CVE: CVE-2025-0373

IAVA: 2025-A-0069

Detections

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