Ahmet Sait提出的问题 -ubuntu

Ahmet Sait

Asked: 2025-02-12 17:37:36 +0800 CST

是否可以在没有“flags=(unconfined)”的情况下授予 AppArmor 配置文件“userns”权限？

5

基本上就是标题。

我尝试添加userns到 AppArmor 配置文件，但没有标志它似乎不起作用unconfined。

那么，在没有的情况下我可以使以下配置文件工作吗flags=(unconfined)？如果不行，为什么？

abi <abi/4.0>,
include <tunables/global>

profile my-app /usr/lib/my-app/app flags=(unconfined) {
    userns,
}

Ahmet Sait

Asked: 2025-02-09 05:05:44 +0800 CST

使用 AppArmor 修复 Firefox 中的“某些 Firefox 安全功能可能对您当前的操作系统提供的保护较少”警告的正确方法是什么？

7

在全新安装 Kubuntu 24.04.1 后，我用 deb 软件包版本替换了 Firefox。Firefox 向我发出了警告：

Firefox 的某些安全功能可能对您当前的操作系统提供较少的保护。如何解决此问题

我尝试按照给定链接中的说明进行操作，但没有成功，然后意识到我已经有一个适用于 Firefox 的 AppArmor 配置文件：

$ cat /etc/apparmor.d/firefox
# This profile allows everything and only exists to give the
# application a name instead of having the label "unconfined"

abi <abi/4.0>,
include <tunables/global>

profile firefox /{usr/lib/firefox{,-esr,-beta,-devedition,-nightly},opt/firefox}/firefox{,-esr,-bin} flags=(unconfined) {
  userns,

  # Site-specific additions and overrides. See local/README for details.
  include if exists <local/firefox>
}

该配置文件似乎来自apparmor以下包：

$ dpkg -S /etc/apparmor.d/firefox
apparmor: /etc/apparmor.d/firefox

$ apt list apparmor
Listing... Done
apparmor/noble-updates,now 4.0.1really4.0.1-0ubuntu0.24.04.3 amd64 [installed,automatic]

然后我在 usr.bin.firefox 中看到了另一个配置文件：

$ cat /etc/apparmor.d/usr.bin.firefox
# vim:syntax=apparmor
# Author: Jamie Strandboge <[email protected]>

# Declare an apparmor variable to help with overrides
@{MOZ_LIBDIR}=/usr/lib/firefox

#include <tunables/global>

# We want to confine the binaries that match:
#  /usr/lib/firefox/firefox
#  /usr/lib/firefox/firefox
# but not:
#  /usr/lib/firefox/firefox.sh
profile firefox /usr/lib/firefox/firefox{,*[^s][^h]} {
  #include <abstractions/audio>
  #include <abstractions/cups-client>
  #include <abstractions/dbus-strict>
  #include <abstractions/dbus-session-strict>
  #include <abstractions/dconf>
  #include <abstractions/fcitx>
  #include <abstractions/gnome>
  #include <abstractions/ibus>
  #include <abstractions/mesa>
  #include <abstractions/nameservice>
  #include <abstractions/openssl>
  #include <abstractions/p11-kit>
  #include <abstractions/ubuntu-unity7-base>
  #include <abstractions/ubuntu-unity7-launcher>

  #include <abstractions/dbus-accessibility-strict>
  dbus (send)
       bus=session
       peer=(name=org.a11y.Bus),
  dbus (receive)
       bus=session
       interface=org.a11y.atspi**,
  dbus (receive, send)
       bus=accessibility,

  # for networking
  network inet stream,
  network inet6 stream,
  @{PROC}/[0-9]*/net/arp r,
  @{PROC}/[0-9]*/net/if_inet6 r,
  @{PROC}/[0-9]*/net/ipv6_route r,
  @{PROC}/[0-9]*/net/dev r,
  @{PROC}/[0-9]*/net/wireless r,
  dbus (send)
       bus=system
       path=/org/freedesktop/NetworkManager
       member=state,
  dbus (receive)
       bus=system
       path=/org/freedesktop/NetworkManager,

  # used by third_party/rust/audio_thread_priority
  dbus (send)
       bus=system
       path=/org/freedesktop/RealtimeKit1,

  # should maybe be in abstractions
  /etc/ r,
  /etc/mime.types r,
  /etc/mailcap r,
  /etc/xdg/*buntu/applications/defaults.list    r, # for all derivatives
  /etc/xfce4/defaults.list r,
  /usr/share/xubuntu/applications/defaults.list r,
  owner @{HOME}/.local/share/applications/defaults.list r,
  owner @{HOME}/.local/share/applications/mimeapps.list r,
  owner @{HOME}/.local/share/applications/mimeinfo.cache r,
  /var/lib/snapd/desktop/applications/mimeinfo.cache r,
  /var/lib/snapd/desktop/applications/*.desktop r,
  owner /tmp/** m,
  owner /var/tmp/** m,
  owner /{,var/}run/shm/shmfd-* rw,
  owner /{dev,run}/shm/org.{chromium,mozilla}.* rwk,
  owner /{dev,run}/shm/wayland.mozilla.ipc.[0-9]* rw,
  /tmp/.X[0-9]*-lock r,
  /etc/udev/udev.conf r,
  # Doesn't seem to be required, but noisy. Maybe allow 'r' for 'b*' if needed.
  # Possibly move to an abstraction if anything else needs it.
  deny /run/udev/data/** r,
  # let the shell know we launched something
  dbus (send)
     bus=session
     interface=org.gtk.gio.DesktopAppInfo
     member=Launched,

  /etc/timezone r,
  /etc/wildmidi/wildmidi.cfg r,

  # firefox specific
  /etc/firefox*/ r,
  /etc/firefox*/** r,
  /etc/xul-ext/** r,
  /etc/xulrunner-2.0*/ r,
  /etc/xulrunner-2.0*/** r,
  /etc/gre.d/ r,
  /etc/gre.d/* r,

  # noisy
  deny @{MOZ_LIBDIR}/** w,
  deny /usr/lib/firefox-addons/** w,
  deny /usr/lib/xulrunner-addons/** w,
  deny /usr/lib/xulrunner-*/components/*.tmp w,
  deny /.suspended r,
  deny /boot/initrd.img* r,
  deny /boot/vmlinuz* r,
  deny /var/cache/fontconfig/ w,
  deny @{HOME}/.local/share/recently-used.xbel r,

  # TODO: investigate
  deny /usr/bin/gconftool-2 x,

  # These are needed when a new user starts firefox and firefox.sh is used
  @{MOZ_LIBDIR}/** ixr,
  /usr/bin/basename ixr,
  /usr/bin/dirname ixr,
  /usr/bin/pwd ixr,
  /sbin/killall5 ixr,
  /bin/which ixr,
  /usr/bin/tr ixr,
  @{PROC}/ r,
  @{PROC}/[0-9]*/cmdline r,
  @{PROC}/[0-9]*/mountinfo r,
  @{PROC}/[0-9]*/stat r,
  owner @{PROC}/[0-9]*/task/[0-9]*/stat r,
  @{PROC}/[0-9]*/status r,
  @{PROC}/filesystems r,
  @{PROC}/sys/vm/overcommit_memory r,
  # prevent crash LP: #1931602
  /sys/devices/pci[0-9]*/**/{uevent,resource,irq,class} r,
  /sys/devices/platform/**/uevent r,
  /sys/devices/pci*/**/{busnum,idVendor,idProduct} r,
  /sys/devices/pci*/**/{,subsystem_}device r,
  /sys/devices/pci*/**/{,subsystem_}vendor r,
  /sys/devices/system/node/node[0-9]*/meminfo r,
  owner @{HOME}/.cache/thumbnails/** rw,

  /etc/mtab r,
  /etc/fstab r,

  # Needed for the crash reporter
  owner @{PROC}/[0-9]*/environ r,
  owner @{PROC}/[0-9]*/auxv r,
  /etc/lsb-release r,
  /usr/bin/expr ix,
  /sys/devices/system/cpu/ r,
  /sys/devices/system/cpu/** r,

  # about:memory
  owner @{PROC}/[0-9]*/statm r,
  owner @{PROC}/[0-9]*/smaps r,

  # allow access to documentation and other files the user may want to look
  # at in /usr and /opt
  /usr/ r,
  /usr/** r,
  /opt/ r,
  /opt/** r,

  # so browsing directories works
  / r,
  /**/ r,

  # Default profile allows downloads to ~/Downloads and uploads from ~/Public
  owner @{HOME}/ r,
  owner @{HOME}/Public/ r,
  owner @{HOME}/Public/* r,
  owner @{HOME}/Downloads/ r,
  owner @{HOME}/Downloads/* rw,

  # per-user firefox configuration
  owner @{HOME}/.{firefox,mozilla}/ rw,
  owner @{HOME}/.{firefox,mozilla}/** rw,
  owner @{HOME}/.{firefox,mozilla}/**/*.{db,parentlock,sqlite}* k,
  owner @{HOME}/.{firefox,mozilla}/plugins/** rm,
  owner @{HOME}/.{firefox,mozilla}/**/plugins/** rm,
  owner @{HOME}/.gnome2/firefox* rwk,
  owner @{HOME}/.cache/mozilla/{,firefox/} rw,
  owner @{HOME}/.cache/mozilla/firefox/** rw,
  owner @{HOME}/.cache/mozilla/firefox/**/*.sqlite* k,
  owner @{HOME}/.config/gtk-3.0/bookmarks r,
  owner @{HOME}/.config/dconf/user w,
  owner /{,var/}run/user/*/dconf/user w,
  dbus (send)
       bus=session
       path=/org/gnome/GConf/Server
       member=GetDefaultDatabase
       peer=(label=unconfined),
  dbus (send)
       bus=session
       path=/org/gnome/GConf/Database/*
       member={AddMatch,AddNotify,AllEntries,LookupExtended,RemoveNotify}
       peer=(label=unconfined),
  dbus (send)
       bus=session
       path=/org/gtk/vfs/mounttracker
       interface=org.gtk.vfs.MountTracker
       member=ListMountableInfo
       peer=(label=unconfined),

  # Allow access to xdg-desktop-portal and xdg-document-portal (LP: #1974449)
  dbus (receive, send)
       bus=session
       interface=org.freedesktop.portal.*
       path=/org/freedesktop/portal/{desktop,documents}{,/**}
       peer=(label=unconfined),

  dbus (receive, send)
       bus=session
       interface=org.freedesktop.DBus.Properties
       path=/org/freedesktop/portal/{desktop,documents}{,/**}
       peer=(label=unconfined),

  # Allow access to the Fcitx portal, supported by fcitx/fcitx5
  dbus (send)
      bus=session
      path=/{,org/freedesktop/portal/}inputmethod
      interface=org.fcitx.Fcitx.InputMethod1
      member={CreateInputContext,Version}
      peer=(name=org.freedesktop.portal.Fcitx),
  dbus (send, receive)
      bus=session
      path=/{,org/freedesktop/portal/}inputcontext/**
      interface=org.fcitx.Fcitx.InputContext1,

  # Allow remote control when running on Wayland
  dbus (send)
       bus=session
       path=/org/freedesktop/DBus
       interface=org.freedesktop.DBus
       member=RequestName
       peer=(name=org.freedesktop.DBus),
  dbus (bind)
       bus=session
       name=org.mozilla.firefox.*,
  dbus (send, receive)
       bus=session
       path=/org/mozilla/firefox/Remote
       interface=org.mozilla.firefox
       member=OpenURL
       peer=(label=firefox),

  # gnome-session
  dbus (send)
       bus=session
       path=/org/gnome/SessionManager
       interface=org.gnome.SessionManager
       member={Inhibit,Uninhibit}
       peer=(label=unconfined),

  # unity screen API
  dbus (send)
       bus=system
       interface="org.freedesktop.DBus.Introspectable"
       path="/com/canonical/Unity/Screen"
       member="Introspect"
       peer=(label=unconfined),
  dbus (send)
       bus=system
       interface="com.canonical.Unity.Screen"
       path="/com/canonical/Unity/Screen"
       member={keepDisplayOn,removeDisplayOnRequest}
       peer=(label=unconfined),

  # freedesktop.org ScreenSaver
  dbus (send)
       bus=session
       path=/{,org/freedesktop/,org.gnome/}Screen{s,S}aver
       interface=org.freedesktop.ScreenSaver
       member={Inhibit,UnInhibit,SimulateUserActivity}
       peer=(label=unconfined),

  # gnome, kde and cinnamon screensaver
  dbus (send)
       bus=session
       path=/{,ScreenSaver}
       interface=org.{gnome.ScreenSaver,kde.screensaver,cinnamon.ScreenSaver}
       member=SimulateUserActivity
       peer=(label=unconfined),

  # UPower
  dbus (send)
       bus=system
       path=/org/freedesktop/UPower
       interface=org.freedesktop.UPower
       member=EnumerateDevices
       peer=(label=unconfined),

  # File browser
  dbus (send)
       bus=session
       interface=org.freedesktop.FileManager1
       path=/org/freedesktop/FileManager1
       member=ShowItems,

  #
  # Extensions
  # /usr/share/.../extensions/... is already covered by '/usr/** r', above.
  # Allow 'x' for downloaded extensions, but inherit policy for safety
  owner @{HOME}/.mozilla/**/extensions/** mixr,

  deny @{MOZ_LIBDIR}/update.test w,
  deny /usr/lib/mozilla/extensions/**/ w,
  deny /usr/lib/xulrunner-addons/extensions/**/ w,
  deny /usr/share/mozilla/extensions/**/ w,
  deny /usr/share/mozilla/ w,

  # Miscellaneous (to be abstracted)
  # Ideally these would use a child profile. They are all ELF executables
  # so running with 'Ux', while not ideal, is ok because we will at least
  # benefit from glibc's secure execute.
  /usr/bin/mkfifo Uxr,  # investigate
  /bin/ps Uxr,
  /bin/uname Uxr,

  /usr/bin/lsb_release Cxr -> lsb_release,
  profile lsb_release {
    #include <abstractions/base>
    #include <abstractions/python>
    /usr/bin/lsb_release r,
    /bin/dash ixr,
    /usr/bin/dpkg-query ixr,
    /usr/include/python2.[4567]/pyconfig.h r,
    /etc/lsb-release r,
    /etc/debian_version r,
    /usr/share/distro-info/*.csv r,
    /var/lib/dpkg/** r,

    /usr/local/lib/python3.[0-9]/dist-packages/ r,
    /usr/bin/ r,
    /usr/bin/python3.[0-9] mr,

    # file_inherit
    deny /tmp/gtalkplugin.log w,
  }

  # Addons
  #include <abstractions/ubuntu-browsers.d/firefox>

  # Site-specific additions and overrides. See local/README for details.
  #include <local/usr.bin.firefox>
}

它来自 Firefox 包本身：

$ dpkg -S /etc/apparmor.d/usr.bin.firefox
firefox: /etc/apparmor.d/usr.bin.firefox

$ apt list firefox
Listing... Done
firefox/noble,now 135.0+build2-0ubuntu0.24.04.1~mt2 amd64 [installed]

此时，似乎usr.bin.firefox文件具有优先级，因此我进行了/etc/apparmor.d/local/usr.bin.firefox如下编辑：

$ cat /etc/apparmor.d/local/usr.bin.firefox
userns,

但是，除非我将其添加到配置文件中，否则警告不会消失，flags=(unconfined)据我所知，这意味着不会对该过程施加任何限制。

所以问题是，是否可以允许 Firefox在不使用标志的情况下使用非特权用户命名空间unconfined进行沙盒处理？换句话说，如何应用 AppArmor 规则并仍然允许userns特权？

Ahmet Sait

Asked: 2015-10-04 04:03:53 +0800 CST

包管理器导致内核冻结？

0

我在包管理方面遇到了这个严重的问题。每当我尝试安装某些东西（任何东西）时，它都会导致系统永久冻结。它比看起来更糟糕，Ctrl+Alt+F1 不起作用，甚至 Alt+SysRq+REISUB 也不起作用！

可能的问题触发器

E4大鼠
网络电话

我高度怀疑 Skype，因为第一次崩溃发生在我尝试安装它时，它取得了一些进展，然后我的 PC 冻结了，从那以后它就冻结了（每当我尝试通过 apt / dpkg / Ubuntu 软件中心安装某些东西时）。

我可能是错的，也许第一次冻结是由于其他原因而发生的，并且强制计算机重新启动损坏了文件系统，因此可能尝试访问所需的与包相关的文件会使系统崩溃。

例子：

$ sudo apt-get install synaptic
E: dpkg kesintiye uğradı, sorunu düzeltmek için elle 'sudo dpkg --configure -a' komutunu çalıştırın.
$ sudo dpkg --configure -a

最后一行导致永久冻结。

我迫切需要一些解决方案，欢迎任何帮助！

是否可以在没有“flags=(unconfined)”的情况下授予 AppArmor 配置文件“userns”权限？

使用 AppArmor 修复 Firefox 中的“某些 Firefox 安全功能可能对您当前的操作系统提供的保护较少”警告的正确方法是什么？

包管理器导致内核冻结？

可能的问题触发器

如何运行 .sh 脚本？

如何安装 .tar.gz（或 .tar.bz2）文件？

如何列出所有已安装的软件包

无法锁定管理目录 (/var/lib/dpkg/) 是另一个进程在使用它吗？

Ahmet Sait's questions

是否可以在没有“flags=(unconfined)”的情况下授予 AppArmor 配置文件“userns”权限？

使用 AppArmor 修复 Firefox 中的“某些 Firefox 安全功能可能对您当前的操作系统提供的保护较少”警告的正确方法是什么？

包管理器导致内核冻结？

可能的问题触发器

如何运行 .sh 脚本？

如何安装 .tar.gz（或 .tar.bz2）文件？

如何列出所有已安装的软件包

无法锁定管理目录 (/var/lib/dpkg/) 是另一个进程在使用它吗？