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FreeBSD : FreeBSD -- NFS client accepts file names containing path separators (c02b8db5-771b-11ef-9a62-002590c1f29c)

medium Nessus Plugin ID 207548

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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 c02b8db5-771b-11ef-9a62-002590c1f29c advisory.

 When mounting a remote filesystem using NFS, the kernel did not sanitize remotely provided filenames for the path separator character, /. This allows readdir(3) and related functions to return filesystem entries with names containing additional path components.
 The lack of validation described above gives rise to a confused deputy problem. For example, a program copying files from an NFS mount could be tricked into copying from outside the intended source directory, and/or to a location outside the intended destination directory.

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?35a52cbe

Plugin Details

Severity: Medium

ID: 207548

File Name: freebsd_pkg_c02b8db5771b11ef9a62002590c1f29c.nasl

Version: 1.3

Type: local

Published: 9/21/2024

Updated: 11/25/2024

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2024-6759

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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: 9/20/2024

Vulnerability Publication Date: 8/11/2024

Reference Information

CVE: CVE-2024-6759

IAVA: 2024-A-0485-S, 2024-A-0594-S