CVE-2013-4408:librpc: check for invalid frag_len within dcerpc_read_ncacn_packet_done()

Bug: https://bugzilla.samba.org/show_bug.cgi?id=10185

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

diff --git a/librpc/rpc/dcerpc_util.c b/librpc/rpc/dcerpc_util.c
index 980b0709dbaed2ceaa87f7823b85162d35aae9ed..c963da84ce38d265e199fec143e466fe7ca82c1d 100644 (file)
--- a/librpc/rpc/dcerpc_util.c
+++ b/librpc/rpc/dcerpc_util.c
@@ -292,6 +292,11 @@ static void dcerpc_read_ncacn_packet_done(struct tevent_req *subreq)
                return;
        }
 
+       if (state->pkt->frag_length != state->buffer.length) {
+               tevent_req_nterror(req, NT_STATUS_RPC_PROTOCOL_ERROR);
+               return;
+       }
+
        tevent_req_done(req);
 }