Bugzilla Bug 144092

SA 21446 & SA 21450 :

Software:       XFree86 4.1.x
XFree86 4.2.x
XFree86 4.3.x
XFree86 4.4.x
XFree86 4.5.x
XFree86 4.6.x
Description:
A vulnerability has been reported in XFree86, which can be exploited by
malicious people to cause a DoS (Denial of Service) and potentially compromise
a vulnerable system.

The vulnerability is caused due to integer overflows in the PCF font parser and
can be exploited to crash the X server and potentially execute arbitrary code.

This is related to:
SA20100

Solution:
Do not parse untrusted PCF font files.

Other References:
SA20100:
http://secunia.com/advisories/20100/





Software:       X Window System 11 (X11) 6.x
X Window System 11 (X11) 7.x

Description:
A vulnerability has been reported in libXfont, which can be exploited by
malicious people to cause a DoS (Denial of Service) and potentially compromise
an application using the library.

The vulnerability is caused due to integer overflows within the PCF font file
parser. This can potentially be exploited to cause a heap-based buffer overflow
via a specially crafted font file.

This is related to:
SA20100

Successful exploitation may allow execution of arbitrary code.

Solution:
Apply patch.
http://bugs.freedesktop.org/attachment.cgi?id=6231

Original Advisory:
https://bugs.freedesktop.org/show_bug.cgi?id=7535

Other References:
SA20100:
http://secunia.com/advisories/20100/

We tried it at work and we only crashes the application (not the whole X
screen), because of a crash in a strlen() before being able to exploit the
overflow. So DoS.

But Secunia rates it as maybe code execution.

libXfont 1.2.0-r1 is in the tree and fixed. All arches should expect to
stabilize on it, including sparc, which should stabilize on modular X now that
its final blocker is gone.

Older, monolithic ebuilds may or may not be fixed as time permits.

Hi arches, x11-libs/libXfont-1.2.0-r1 is to be tested and marked stable if
possible, thanks.

modular xorg-x11 isn't stabilized for Sparc yet : we'll see if there is a fixed
xorg-x11-6.x ebuild in a reasonable time, otherwise we will have to decide
between a tempGLSA without Sparc, or a stabilization of xorg-x11-7.x .

(and maybe a little people like me still uses the 6.x branch because the 7.x
branch sucks with certain drivers :(   )

1) emerges fine
2) passes collision test
3) X server starts up and works with Gnome, KDE and XSession

Portage 2.1-r2 (default-linux/x86/2006.0, gcc-3.4.6, glibc-2.3.6-r4,
2.6.17-gentoo-r4 i686)
=================================================================
System uname: 2.6.17-gentoo-r4 i686 AMD Athlon(tm) XP 2500+
Gentoo Base System version 1.12.4
app-admin/eselect-compiler: [Not Present]
dev-lang/python:     2.4.3-r1
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache:     [Not Present]
dev-util/confcache:  [Not Present]
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.59-r7
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2
sys-devel/binutils:  2.16.1-r3
sys-devel/gcc-config: 1.3.13-r3
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.11-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O2"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/X11/xkb"
CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/splash
/etc/terminfo"
CXXFLAGS="-O2"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig ccache collision-protect distlocks metadata-transfer
parallel-fetch sandbox sfperms strict test"
GENTOO_MIRRORS="ftp://sunsite.informatik.rwth-aachen.de/pub/Linux/gentoo/"
LANG="de_DE@euro"
LC_ALL="de_DE@euro"
LINGUAS="de"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude='/distfiles' --exclude='/local' --exclude='/packages'"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.informatik.rwth-aachen.de/gentoo-portage"
USE="x86 3dnow 3dnowext X Xaw3d a52 alsa arts artworkextra asf audiofile avi
bash-completion beagle berkdb bidi bitmap-fonts bootsplash branding bzip2 cairo
cdda cddb cdparanoia cdr cli cracklib crypt css cups curl custom-cflags dbus
dga directfb divx4linux dlloader dri dts dvd dvdr dvdread dvi eds emacs emboss
encode esd evo exif expat fam fat fbcon ffmpeg firefox foomaticdb fortran ftp
gb gcj gdbm gif gnome gpm gstreamer gtk gtk2 gtkhtml hal icq idn imagemagick
imap imlib ipv6 isdnlog java javascript jikes jpeg jpeg2k ldap leim libg++
libwww lm_sensors mad maildir matroska mbox mikmod mime mmx mmxext mng mono
motif mp3 mpeg mpeg2 mule nautilus ncurses nforce2 nls nocardbus nptl nptlonly
nsplugin nvidia objc ogg opengl pam pcre pdf pdflib perl plotutils pmu png ppds
pppd preview-latex print python qt3 qt4 quicktime readline reflection reiserfs
samba sdk session slang spell spl sse ssl svg svga t1lib tcltk tcpd tetex
theora thunderbird tiff truetype truetype-fonts type1-fonts udev usb vcd videos
vorbis win32codecs wmf wxwindows xine xml xorg xosd xv xvid zlib elibc_glibc
input_devices_mouse input_devices_keyboard kernel_linux linguas_de userland_GNU
video_cards_radeon video_cards_vesa video_cards_fbdev"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LDFLAGS,
PORTAGE_RSYNC_EXTRA_OPTS

ppc stable

ppc64 stable

x86 is gone ^.^

alpha and amd64 stable.

Stable for sparc.

stable on mips

Accepting bug.

stable on hppa

GLSA 200609-04

Remailed again,again to FD due to DNS failures. Apparently sent but not
received yet.