Fix CVE-2018-1002150 - distRepoMove missing access check

Fixes: #850
https://pagure.io/koji/issue/850
fix access check in host.distRepoMove

hub/kojihub.py

@@ -12517,6 +12517,8 @@ class HostExports(object):
         In sigmap, use sig=None to use the primary copy of the rpm instead of a
         signed copy.
         """
+        host = Host()
+        host.verify()
         workdir = koji.pathinfo.work()
         rinfo = repo_info(repo_id, strict=True)
         repodir = koji.pathinfo.distrepo(repo_id, rinfo['tag_name'])

koji/auth.py

@@ -71,6 +71,10 @@ class Session(object):
         self.exclusive = False
         self.lockerror = None
         self.callnum = None
+        # we look up perms, groups, and host_id on demand, see __getattr__
+        self._perms = None
+        self._groups = None
+        self._host_id = ''
         #get session data from request
         if args is None:
             environ = getattr(context, 'environ', {})
@@ -204,10 +208,6 @@ class Session(object):
         self.master = session_data['master']
         self.session_data = session_data
         self.user_data = user_data
-        # we look up perms, groups, and host_id on demand, see __getattr__
-        self._perms = None
-        self._groups = None
-        self._host_id = ''
         self.logged_in = True
 
     def __getattr__(self, name):