Package: xdg-utils
Version: 1.1.0~rc1+git20111210-7.3
Severity: grave
Tags: security patch
Justification: user security hole
Hi,
there is a long-standing issue with xdg-open on debian -- it parses all files
it is trying to open. This is easily exploitable. Requirements are similar as
in last RCE: Window Manager which is _NOT_ one of the following:
* KDE
* GNOME
* MATE
* XFCE
* ENLIGHTENMENT
Problem is caused by name collision in local variables, which are apparently
not very local in this case (maybe also dash problem?)
Exploit was made from wikipedia image [0].
It would be nice to have it fixed in jessie.
Cheers,
Jiri
[0]
https://commons.wikimedia.org/wiki/Category:Unidentified_animals#mediaviewer/File:Augochlora_buscki,_M,_Back5,_Puerto_Rico,_Yauco_2014-09-15-18.11.39_ZS_PMax_(16292752499).jpg
-- System Information:
Debian Release: 8.0
APT prefers testing
APT policy: (990, 'testing'), (500, 'testing-updates'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
xdg-utils depends on no packages.
Versions of packages xdg-utils recommends:
pn libfile-mimeinfo-perl <none>
pn libnet-dbus-perl <none>
pn libx11-protocol-perl <none>
ii x11-utils 7.7+2
ii x11-xserver-utils 7.7+3+b1
Versions of packages xdg-utils suggests:
pn gvfs-bin <none>
-- no debconf information
--- xdg-open.orig 2015-02-11 21:40:42.560282993 +0100
+++ xdg-open 2015-02-11 21:44:10.695894428 +0100
@@ -538,16 +538,16 @@
DEBUG 3 "$xdg_user_dir:$xdg_system_dirs"
for x in `echo "$xdg_user_dir:$xdg_system_dirs" | sed 's/:/ /g'`; do
- local file
+ local desktop_file
# look for both vendor-app.desktop, vendor/app.desktop
if [ -r "$x/applications/$default" ]; then
- file="$x/applications/$default"
+ desktop_file="$x/applications/$default"
elif [ -r "$x/applications/`echo $default | sed -e 's|-|/|'`" ]; then
- file="$x/applications/`echo $default | sed -e 's|-|/|'`"
+ desktop_file="$x/applications/`echo $default | sed -e 's|-|/|'`"
fi
- if [ -r "$file" ] ; then
- set -- $(sed -n 's/^Exec\(\[[^]]*\]\)\{0,1\}=//p' "$file")
+ if [ -r "$desktop_file" ] ; then
+ set -- $(sed -n 's/^Exec\(\[[^]]*\]\)\{0,1\}=//p' "$desktop_file")
command_exec="$(which "$1" 2> /dev/null)"
if [ -x "$command_exec" ] ; then
shift
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