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aa9e3354ef
Several cases were found needing /tmp, for example ceph will try to list /tmp This is a compromise of security and usability: - we only allow generally enumerating the base dir - enumerating anything deeper in the dir is at least guarded by the "owner" restriction, but while that protects files of other services it won't protect qemu instances against each other as they usually run with the same user. - even with the owner restriction we only allow read for the wildcard path Acked-by: Jamie Strandboge <jamie@canonical.com> Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
223 lines
6.7 KiB
Plaintext
223 lines
6.7 KiB
Plaintext
# Last Modified: Wed Sep 3 21:52:03 2014
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#include <abstractions/base>
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#include <abstractions/consoles>
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#include <abstractions/nameservice>
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# required for reading disk images
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capability dac_override,
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capability dac_read_search,
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capability chown,
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# needed to drop privileges
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capability setgid,
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capability setuid,
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network inet stream,
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network inet6 stream,
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ptrace (readby, tracedby) peer=/usr/sbin/libvirtd,
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signal (receive) peer=/usr/sbin/libvirtd,
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/dev/net/tun rw,
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/dev/kvm rw,
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/dev/ptmx rw,
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/dev/kqemu rw,
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@{PROC}/*/status r,
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# When qemu is signaled to terminate, it will read cmdline of signaling
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# process for reporting purposes. Allowing read access to a process
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# cmdline may leak sensitive information embedded in the cmdline.
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@{PROC}/@{pid}/cmdline r,
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# Per man(5) proc, the kernel enforces that a thread may
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# only modify its comm value or those in its thread group.
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owner @{PROC}/@{pid}/task/@{tid}/comm rw,
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@{PROC}/sys/kernel/cap_last_cap r,
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# For hostdev access. The actual devices will be added dynamically
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/sys/bus/usb/devices/ r,
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/sys/devices/**/usb[0-9]*/** r,
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# libusb needs udev data about usb devices (~equal to content of lsusb -v)
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/run/udev/data/c16[6,7]* r,
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/run/udev/data/c18[0,8,9]* r,
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/run/udev/data/+usb* r,
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# WARNING: this gives the guest direct access to host hardware and specific
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# portions of shared memory. This is required for sound using ALSA with kvm,
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# but may constitute a security risk. If your environment does not require
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# the use of sound in your VMs, feel free to comment out or prepend 'deny' to
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# the rules for files in /dev.
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/{dev,run}/shm r,
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/{dev,run}/shmpulse-shm* r,
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/{dev,run}/shmpulse-shm* rwk,
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/dev/snd/* rw,
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capability ipc_lock,
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# spice
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owner /{dev,run}/shm/spice.* rw,
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# 'kill' is not required for sound and is a security risk. Do not enable
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# unless you absolutely need it.
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deny capability kill,
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# Uncomment the following if you need access to /dev/fb*
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#/dev/fb* rw,
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/etc/pulse/client.conf r,
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@{HOME}/.pulse-cookie rwk,
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owner /root/.pulse-cookie rwk,
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owner /root/.pulse/ rw,
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owner /root/.pulse/* rw,
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/usr/share/alsa/** r,
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owner /tmp/pulse-*/ rw,
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owner /tmp/pulse-*/* rw,
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/var/lib/dbus/machine-id r,
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# access to firmware's etc
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/usr/share/kvm/** r,
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/usr/share/qemu/** r,
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/usr/share/qemu-kvm/** r,
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/usr/share/bochs/** r,
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/usr/share/openbios/** r,
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/usr/share/openhackware/** r,
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/usr/share/proll/** r,
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/usr/share/vgabios/** r,
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/usr/share/seabios/** r,
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/usr/share/misc/sgabios.bin r,
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/usr/share/ovmf/** r,
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/usr/share/OVMF/** r,
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/usr/share/AAVMF/** r,
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/usr/share/qemu-efi/** r,
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/usr/share/slof/** r,
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# pki for libvirt-vnc and libvirt-spice (LP: #901272, #1690140)
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/etc/pki/CA/ r,
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/etc/pki/CA/* r,
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/etc/pki/libvirt{,-spice,-vnc}/ r,
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/etc/pki/libvirt{,-spice,-vnc}/** r,
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# the various binaries
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/usr/bin/kvm rmix,
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/usr/bin/qemu rmix,
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/usr/bin/qemu-kvm rmix,
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/usr/bin/qemu-system-aarch64 rmix,
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/usr/bin/qemu-system-alpha rmix,
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/usr/bin/qemu-system-arm rmix,
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/usr/bin/qemu-system-cris rmix,
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/usr/bin/qemu-system-i386 rmix,
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/usr/bin/qemu-system-lm32 rmix,
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/usr/bin/qemu-system-m68k rmix,
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/usr/bin/qemu-system-microblaze rmix,
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/usr/bin/qemu-system-microblazeel rmix,
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/usr/bin/qemu-system-mips rmix,
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/usr/bin/qemu-system-mips64 rmix,
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/usr/bin/qemu-system-mips64el rmix,
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/usr/bin/qemu-system-mipsel rmix,
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/usr/bin/qemu-system-moxie rmix,
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/usr/bin/qemu-system-or32 rmix,
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/usr/bin/qemu-system-ppc rmix,
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/usr/bin/qemu-system-ppc64 rmix,
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/usr/bin/qemu-system-ppcemb rmix,
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/usr/bin/qemu-system-s390x rmix,
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/usr/bin/qemu-system-sh4 rmix,
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/usr/bin/qemu-system-sh4eb rmix,
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/usr/bin/qemu-system-sparc rmix,
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/usr/bin/qemu-system-sparc64 rmix,
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/usr/bin/qemu-system-tricore rmix,
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/usr/bin/qemu-system-unicore32 rmix,
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/usr/bin/qemu-system-x86_64 rmix,
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/usr/bin/qemu-system-xtensa rmix,
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/usr/bin/qemu-system-xtensaeb rmix,
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/usr/bin/qemu-aarch64 rmix,
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/usr/bin/qemu-alpha rmix,
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/usr/bin/qemu-arm rmix,
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/usr/bin/qemu-armeb rmix,
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/usr/bin/qemu-cris rmix,
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/usr/bin/qemu-i386 rmix,
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/usr/bin/qemu-m68k rmix,
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/usr/bin/qemu-microblaze rmix,
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/usr/bin/qemu-microblazeel rmix,
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/usr/bin/qemu-mips rmix,
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/usr/bin/qemu-mips64 rmix,
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/usr/bin/qemu-mips64el rmix,
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/usr/bin/qemu-mipsel rmix,
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/usr/bin/qemu-mipsn32 rmix,
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/usr/bin/qemu-mipsn32el rmix,
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/usr/bin/qemu-or32 rmix,
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/usr/bin/qemu-ppc rmix,
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/usr/bin/qemu-ppc64 rmix,
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/usr/bin/qemu-ppc64abi32 rmix,
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/usr/bin/qemu-ppc64le rmix,
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/usr/bin/qemu-s390x rmix,
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/usr/bin/qemu-sh4 rmix,
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/usr/bin/qemu-sh4eb rmix,
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/usr/bin/qemu-sparc rmix,
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/usr/bin/qemu-sparc32plus rmix,
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/usr/bin/qemu-sparc64 rmix,
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/usr/bin/qemu-unicore32 rmix,
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/usr/bin/qemu-x86_64 rmix,
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# for Debian/Ubuntu qemu-block-extra / RPMs qemu-block-* (LP: #1554761)
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/usr/{lib,lib64}/qemu/*.so mr,
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/usr/lib/@{multiarch}/qemu/*.so mr,
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# swtpm
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/{usr/,}bin/swtpm rmix,
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/usr/{lib,lib64}/libswtpm_libtpms.so mr,
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/usr/lib/@{multiarch}/libswtpm_libtpms.so mr,
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# for save and resume
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/{usr/,}bin/dash rmix,
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/{usr/,}bin/dd rmix,
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/{usr/,}bin/cat rmix,
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# for restore
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/{usr/,}bin/bash rmix,
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# for usb access
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/dev/bus/usb/ r,
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/etc/udev/udev.conf r,
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/sys/bus/ r,
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/sys/class/ r,
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# for rbd
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/etc/ceph/ceph.conf r,
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# Various functions will need to enumerate /tmp (e.g. ceph), allow the base
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# dir and a few known functions like samba support.
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# We want to avoid to give blanket rw permission to everything under /tmp,
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# users are expected to add site specific addons for more uncommon cases.
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# Qemu processes usually all run as the same users, so the "owner"
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# restriction prevents access to other services files, but not across
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# different instances.
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# This is a tradeoff between usability and security - if paths would be more
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# predictable that would be preferred - at least for write rules we would
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# want more unique paths per rule.
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/{,var/}tmp/ r,
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owner /{,var/}tmp/**/ r,
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# for file-posix getting limits since 9103f1ce
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/sys/devices/**/block/*/queue/max_segments r,
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# for ppc device-tree access
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@{PROC}/device-tree/ r,
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@{PROC}/device-tree/** r,
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/sys/firmware/devicetree/** r,
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# allow connect with openGraphicsFD to work
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unix (send, receive) type=stream addr=none peer=(label=/usr/sbin/libvirtd),
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# for gathering information about available host resources
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/sys/devices/system/cpu/ r,
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/sys/devices/system/node/ r,
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/sys/devices/system/node/node[0-9]*/meminfo r,
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/sys/module/vhost/parameters/max_mem_regions r,
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# silence refusals to open lttng files (see LP: #1432644)
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deny /dev/shm/lttng-ust-wait-* r,
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deny /run/shm/lttng-ust-wait-* r,
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# for vfio hotplug on systems without static vfio (LP: #1775777)
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/dev/vfio/vfio rw,
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# required for sasl GSSAPI plugin
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/etc/gss/mech.d/ r,
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/etc/gss/mech.d/* r,
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