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

This script is Copyright (C) 2014 Tenable Network Security, Inc.


Synopsis :

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

Description :

freedesktop.org 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.

See also :

http://lists.x.org/archives/xorg-announce/2014-January/002389.html
http://www.nessus.org/u?1603fbe4

Solution :

Update the affected package.

Risk factor :

High / CVSS Base Score : 9.3
(CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C)
Public Exploit Available : true

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 71874 ()

Bugtraq ID:

CVE ID: CVE-2013-6462

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