FreeBSD : libXfont -- BDF parsing issues (f7d79fac-cd49-11e4-898f-bcaec565249c)

High Nessus Plugin ID 81901


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


Alan Coopersmith reports :

Ilja van Sprundel, a security researcher with IOActive, has discovered an issue in the parsing of BDF font files by libXfont. Additional testing by Alan Coopersmith and William Robinet with the American Fuzzy Lop (afl) tool uncovered two more issues in the parsing of BDF font files.

As libXfont is used by the X server to read font files, and an unprivileged user with access to the X server can tell the X server to read a given font file from a path of their choosing, these vulnerabilities have the potential to allow unprivileged users to run code with the privileges of the X server (often root access).


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 81901

File Name: freebsd_pkg_f7d79faccd4911e4898fbcaec565249c.nasl

Version: $Revision: 1.4 $

Type: local

Published: 2015/03/18

Modified: 2016/02/01

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 8.5

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:libXfont, p-cpe:/a:freebsd:freebsd:linux-c6-xorg-libs, p-cpe:/a:freebsd:freebsd:linux-f10-xorg-libs, cpe:/o:freebsd:freebsd

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

Patch Publication Date: 2015/03/18

Vulnerability Publication Date: 2015/03/17

Reference Information

CVE: CVE-2015-1802, CVE-2015-1803, CVE-2015-1804