On Sun, 20 Oct 2019 10:15:34 -0300 Marcelo Laia <marcelol...@gmail.com>
wrote:
> root@marcelo:~# dpkg -l apparmor
> Desired=Unknown/Install/Remove/Purge/Hold
> |
> Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/
> Nome Versão Arquitectura Descrição
> +++-==============-============-============-======================================
> ii apparmor 2.13.3-5 amd64 user-space parser
> utility for AppArmor root@marcelo:~#
Following up on this, I am pasting here below the contents of
my /etc/apparmor.d/usr.bin.evince, which allows me to use .mutt as a
folder for pdf files. I guess the culprit should be there (tl;dr: grep
mutt /etc/apparmor.d/usr.bin.evince returns nothing).
---
# vim:syntax=apparmor
# evince is not written with application confinement in mind and is designed to
# operate within a trusted desktop session where anything running within the
# user's session is trusted. That said, evince will often process untrusted
# input (PDFs, images, etc). Ideally evince would be written in such a way that
# image processing is separate from the main process and that processing
# happens in a restrictive sandbox, but unfortunately that is not currently the
# case. Because evince will process untrusted input, this profile aims to
# provide some hardening, but considering evince's design and other factors such
# as X, gsettings, accessibility, translations, DBus session and system
# services, etc, complete confinement is not possible.
#include <tunables/global>
/usr/bin/evince {
#include <abstractions/audio>
#include <abstractions/bash>
#include <abstractions/cups-client>
#include <abstractions/dbus-accessibility>
#include <abstractions/evince>
#include <abstractions/ibus>
#include <abstractions/nameservice>
#include <abstractions/ubuntu-browsers>
#include <abstractions/ubuntu-console-browsers>
#include <abstractions/ubuntu-email>
#include <abstractions/ubuntu-console-email>
#include <abstractions/ubuntu-media-players>
# For now, let evince talk to any session services over dbus. We can
# blacklist any problematic ones (but note, evince uses libsecret :\)
#include <abstractions/dbus-session>
#include <abstractions/dbus-strict>
dbus (receive) bus=system,
# Allow getting information from various system services
dbus (send)
bus=system
member="Get*"
peer=(label=unconfined),
# Allow talking to avahi with whatever polkit allows
dbus (send)
bus=system
interface="org.freedesktop.Avahi{,.*}",
# Allow talking to colord with whatever polkit allows
dbus (send)
bus=system
interface="org.freedesktop.ColorManager{,.*}",
# Terminals for using console applications. These abstractions should ideally
# have 'ix' to restrict access to what only evince is allowed to do
#include <abstractions/ubuntu-gnome-terminal>
# By default, we won't support launching a terminal program in Xterm or
# KDE's konsole. It opens up too many unnecessary files for most users.
# People who need this functionality can uncomment the following:
##include <abstractions/ubuntu-xterm>
##include <abstractions/ubuntu-konsole>
/usr/bin/evince rmPx,
/usr/bin/evince-previewer Px,
/usr/bin/yelp Cx -> sanitized_helper,
/usr/bin/bug-buddy px,
# 'Show Containing Folder' (LP: #1022962)
/usr/bin/nautilus Cx -> sanitized_helper, # Gnome
/usr/bin/pcmanfm Cx -> sanitized_helper, # LXDE
/usr/bin/krusader Cx -> sanitized_helper, # KDE
/usr/bin/thunar Cx -> sanitized_helper, # XFCE
# For Xubuntu to launch the browser
/usr/bin/exo-open ixr,
/usr/lib/@{multiarch}/xfce4/exo-1/exo-helper-1 ixr,
/etc/xdg/xdg-xubuntu/xfce4/helpers.rc r,
/etc/xdg/xfce4/helpers.rc r,
# For text attachments
/usr/bin/gedit ixr,
# For Send to
/usr/bin/nautilus-sendto Cx -> sanitized_helper,
# GLib desktop launch helper (used under the hood by g_app_info_launch)
/usr/lib/@{multiarch}/glib-[0-9]*/gio-launch-desktop rmix,
/usr/bin/env ixr,
# allow directory listings (ie 'r' on directories) so browsing via the file
# dialog works
/ r,
/**/ r,
# This is need for saving files in your home directory without an extension.
# Changing this to '@{HOME}/** r' makes it require an extension and more
# secure (but with 'rw', we still have abstractions/private-files-strict in
# effect).
owner @{HOME}/** rw,
owner /media/** rw,
owner @{HOME}/.local/share/gvfs-metadata/** l,
owner /{,var/}run/user/*/gvfs-metadata/** l,
owner @{HOME}/.gnome2/evince/* rwl,
owner @{HOME}/.gnome2/accels/ rw,
owner @{HOME}/.gnome2/accelsevince rw,
owner @{HOME}/.gnome2/accels/evince rw,
# Maybe add to an abstraction?
/etc/dconf/** r,
owner @{HOME}/.cache/dconf/user rw,
owner @{HOME}/.config/dconf/user r,
owner /{,var/}run/user/*/dconf/ w,
owner /{,var/}run/user/*/dconf/user rw,
owner /{,var/}run/user/*/dconf-service/keyfile/ w,
owner /{,var/}run/user/*/dconf-service/keyfile/user rw,
owner /{,var/}run/user/*/at-spi2-*/ rw,
owner /{,var/}run/user/*/at-spi2-*/** rw,
# from http://live.gnome.org/Evince/SupportedDocumentFormats. Allow
# read and write for all supported file formats
/**.[bB][mM][pP] rw,
/**.[dD][jJ][vV][uU] rw,
/**.[dD][vV][iI] rw,
/**.[gG][iI][fF] rw,
/**.[jJ][pP][gG] rw,
/**.[jJ][pP][eE][gG] rw,
/**.[oO][dD][pP] rw,
/**.[fFpP][dD][fF] rw,
/**.[pP][nN][mM] rw,
/**.[pP][nN][gG] rw,
/**.[pP][sS] rw,
/**.[eE][pP][sS] rw,
/**.[tT][iI][fF] rw,
/**.[tT][iI][fF][fF] rw,
/**.[xX][pP][mM] rw,
/**.[gG][zZ] rw,
/**.[bB][zZ]2 rw,
/**.[cC][bB][rRzZ7] rw,
/**.[xX][zZ] rw,
# evince creates a temporary stream file like '.goutputstream-XXXXXX' in the
# directory a file is saved. This allows that behavior.
owner /**/.goutputstream-* w,
}
/usr/bin/evince-previewer {
#include <abstractions/audio>
#include <abstractions/bash>
#include <abstractions/cups-client>
#include <abstractions/dbus-accessibility>
#include <abstractions/evince>
#include <abstractions/ibus>
#include <abstractions/nameservice>
#include <abstractions/ubuntu-browsers>
#include <abstractions/ubuntu-console-browsers>
#include <abstractions/ubuntu-email>
#include <abstractions/ubuntu-console-email>
#include <abstractions/ubuntu-media-players>
# For now, let evince talk to any session services over dbus. We can
# blacklist any problematic ones (but note, evince uses libsecret :\)
#include <abstractions/dbus-session>
#include <abstractions/dbus-strict>
dbus (receive) bus=system,
# Allow getting information from various system services
dbus (send)
bus=system
member="Get*"
peer=(label=unconfined),
# Allow talking to avahi with whatever polkit allows
dbus (send)
bus=system
interface="org.freedesktop.Avahi{,.*}",
# Allow talking to colord with whatever polkit allows
dbus (send)
bus=system
interface="org.freedesktop.ColorManager{,.*}",
# Terminals for using console applications. These abstractions should ideally
# have 'ix' to restrict access to what only evince is allowed to do
#include <abstractions/ubuntu-gnome-terminal>
# By default, we won't support launching a terminal program in Xterm or
# KDE's konsole. It opens up too many unnecessary files for most users.
# People who need this functionality can uncomment the following:
##include <abstractions/ubuntu-xterm>
/usr/bin/evince-previewer mr,
/usr/bin/yelp Cx -> sanitized_helper,
/usr/bin/bug-buddy px,
# Lenient, but remember we still have abstractions/private-files-strict in
# effect). Write is needed for 'print to file' from the previewer.
@{HOME}/ r,
@{HOME}/** rw,
# Maybe add to an abstraction?
owner /{,var/}run/user/*/dconf/ w,
owner /{,var/}run/user/*/dconf/user rw,
}
/usr/bin/evince-thumbnailer {
#include <abstractions/base>
#include <abstractions/private-files-strict>
#include <abstractions/fonts>
deny @{HOME}/.{,cache/}fontconfig/** wl,
deny @{HOME}/missfont.log wl,
#include <abstractions/dbus-session-strict>
dbus (receive) bus=session,
dbus (send)
bus=session
path="/org/gtk/vfs/mounttracker"
interface="org.gtk.vfs.MountTracker"
member="ListMountableInfo"
peer=(label=unconfined),
# updating gvfs-metadata for thumbnails is unneeded, so explicitly deny it
deny dbus (send)
bus=session
path="/org/gtk/vfs/metadata"
interface="org.gtk.vfs.Metadata"
member="GetTreeFromDevice"
peer=(label=unconfined),
deny @{HOME}/.local/share/gvfs-metadata/* r,
# The thumbnailer doesn't need access to everything in the nameservice
# abstraction. Allow reading of /etc/passwd and /etc/group, but suppress
# logging denial of nsswitch.conf.
/etc/passwd r,
/etc/group r,
deny /etc/nsswitch.conf r,
# TCP/UDP network access for NFS
network inet stream,
network inet6 stream,
network inet dgram,
network inet6 dgram,
/etc/papersize r,
/usr/bin/evince-thumbnailer mr,
/etc/texmf/ r,
/etc/texmf/** r,
/etc/xpdf/* r,
/usr/bin/gs-esp ixr,
/usr/bin/mktexpk Cx -> sanitized_helper,
/usr/bin/mktextfm Cx -> sanitized_helper,
/usr/bin/dvipdfm Cx -> sanitized_helper,
/usr/bin/dvipdfmx Cx -> sanitized_helper,
# supported archivers
/{usr/,}bin/gzip ixr,
/{usr/,}bin/bzip2 ixr,
/usr/bin/unrar* ixr,
/usr/bin/unzip ixr,
/usr/bin/7zr ixr,
/usr/lib/p7zip/7zr ixr,
/usr/bin/7za ixr,
/usr/lib/p7zip/7za ixr,
/usr/bin/zipnote ixr,
/{usr/,}bin/tar ixr,
/usr/bin/xz ixr,
# miscellaneous access for the above
owner @{PROC}/@{pid}/fd/ r,
owner @{PROC}/@{pid}/mountinfo r,
/sys/devices/system/cpu/ r,
# allow read access to anything in /usr/share, for plugins and input methods
/usr/local/share/** r,
/usr/share/** r,
/usr/lib/ghostscript/** mr,
/var/lib/ghostscript/** r,
/var/lib/texmf/** r,
# from http://live.gnome.org/Evince/SupportedDocumentFormats. Allow
# read for all supported file formats
/**.[bB][mM][pP] r,
/**.[dD][jJ][vV][uU] r,
/**.[dD][vV][iI] r,
/**.[gG][iI][fF] r,
/**.[jJ][pP][gG] r,
/**.[jJ][pP][eE][gG] r,
/**.[oO][dD][pP] r,
/**.[fFpP][dD][fF] r,
/**.[pP][nN][mM] r,
/**.[pP][nN][gG] r,
/**.[pP][sS] r,
/**.[eE][pP][sS] r,
/**.[eE][pP][sS][fFiI23] r,
/**.[tT][iI][fF] r,
/**.[tT][iI][fF][fF] r,
/**.[xX][pP][mM] r,
/**.[gG][zZ] r,
/**.[bB][zZ]2 r,
/**.[cC][bB][rRzZ7] r,
/**.[xX][zZ] r,
owner @{HOME}/.texlive*/** r,
owner @{HOME}/.texmf*/** r,
owner @{HOME}/.local/share/{,flatpak/exports/share/}mime/** r,
owner @{HOME}/.local/share/{,flatpak/exports/share/}mime/** r,
# With the network rules above, this allows data exfiltration for files
# not covered by private-files-strict.
@{HOME}/ r,
owner @{HOME}/[^.]** r,
owner /media/** r,
owner /tmp/.gnome_desktop_thumbnail* w,
owner /tmp/gnome-desktop-thumbnailer* w,
owner /tmp/evince-thumbnailer*/{,**} rw,
# Site-specific additions and overrides. See local/README for details.
#include <local/usr.bin.evince>
}
---
Cheers,
--
José María (Chema) Mateos || https://rinzewind.org/
