tools/ocaml/xenstored: check privilege for XS_IS_DOMAIN_INTRODUCED

The Xenstore command XS_IS_DOMAIN_INTRODUCED should be possible for privileged
domains only (the only user in the tree is the xenpaging daemon).

This is part of XSA-115.

Signed-off-by: Edwin Török <edvin.torok@citrix.com>
Acked-by: Christian Lindig <christian.lindig@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

diff --git a/tools/ocaml/xenstored/process.ml b/tools/ocaml/xenstored/process.ml
index fb0a6d47c3e26a9addbdf5c7e9c2e3a846358759..56aea4ce30c8ffe8ceeed01c84236470f8b5dcda 100644 (file)
--- a/tools/ocaml/xenstored/process.ml
+++ b/tools/ocaml/xenstored/process.ml
@@ -166,7 +166,9 @@ let do_setperms con t _domains _cons data =
 let do_error _con _t _domains _cons _data =
        raise Define.Unknown_operation
 
-let do_isintroduced _con _t domains _cons data =
+let do_isintroduced con _t domains _cons data =
+       if not (Connection.is_dom0 con)
+       then raise Define.Permission_denied;
        let domid =
                match (split None '\000' data) with
                | domid :: _ -> int_of_string domid