FreeBSD : libXfont -- Stack buffer overflow in parsing of BDF font files in libXfont (28c575fa-784e-11e3-8249-001cc0380077)

High Nessus Plugin ID 71874


The remote FreeBSD host is missing a security-related update.

Description reports :

A BDF font file containing a longer than expected string can cause a buffer overflow on the stack. Testing in X servers built with Stack Protector restulted in an immediate crash when reading a user-proveded specially crafted font.

As libXfont is used to read user-specified font files in all X servers distributed by X.Org, including the Xorg server which is often run with root privileges or as setuid-root in order to access hardware, this bug may lead to an unprivileged user acquiring root privileges in some systems.


Update the affected package.

See Also

Plugin Details

Severity: High

ID: 71874

File Name: freebsd_pkg_28c575fa784e11e38249001cc0380077.nasl

Version: $Revision: 1.4 $

Type: local

Published: 2014/01/09

Modified: 2014/07/17

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 9.3

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:libXfont, cpe:/o:freebsd:freebsd

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2014/01/08

Vulnerability Publication Date: 2013/12/24

Exploitable With

Core Impact

Reference Information

CVE: CVE-2013-6462