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FreeBSD : libXfont -- permission bypass when opening files through symlinks (08a125f3-e35a-11e7-a293-54e1ad3d6335)

medium Nessus Plugin ID 105335

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Synopsis

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

Description

the freedesktop.org project reports :

A non-privileged X client can instruct X server running under root to open any file by creating own directory with 'fonts.dir', 'fonts.alias' or any font file being a symbolic link to any other file in the system. X server will then open it. This can be issue with special files such as /dev/watchdog.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?e747386a

http://www.nessus.org/u?9dfab500

Plugin Details

Severity: Medium

ID: 105335

File Name: freebsd_pkg_08a125f3e35a11e7a29354e1ad3d6335.nasl

Version: 3.6

Type: local

Published: 12/18/2017

Updated: 11/11/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2017-16611

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:libxfont2, p-cpe:/a:freebsd:freebsd:libxfont

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/17/2017

Vulnerability Publication Date: 11/25/2017

Reference Information

CVE: CVE-2017-16611