Add support for using 3-arg pkcheck syntax for process (CVE-2013-4311)
authorDaniel P. Berrange <berrange@redhat.com>
Wed, 28 Aug 2013 14:25:40 +0000 (15:25 +0100)
committerEric Blake <eblake@redhat.com>
Wed, 18 Sep 2013 21:36:58 +0000 (15:36 -0600)
commit30cf3b74903da808bd1c8e5d79a7a4cb46e726c0
tree4c468ba193f19b9a511c1bb130d9243ed083a3a8
parenteec80bcde88e6e2729b0cc0821c0062e36fb4e03
Add support for using 3-arg pkcheck syntax for process (CVE-2013-4311)

With the existing pkcheck (pid, start time) tuple for identifying
the process, there is a race condition, where a process can make
a libvirt RPC call and in another thread exec a setuid application,
causing it to change to effective UID 0. This in turn causes polkit
to do its permission check based on the wrong UID.

To address this, libvirt must get the UID the caller had at time
of connect() (from SO_PEERCRED) and pass a (pid, start time, uid)
triple to the pkcheck program.

Signed-off-by: Colin Walters <walters@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 922b7fda77b094dbf022d625238262ea05335666)

Conflicts:
src/access/viraccessdriverpolkit.c

Resolution:
  Dropped file that does not exist in this branch.
configure.ac
daemon/remote.c
libvirt.spec.in