[FAB-5627] Missing checks at endorser.go

There is a missing array bounds check that may cause the peer to crash.
Stack trace in the JIRA item.

Change-Id: Ie018f9160aeb2eef4e9075282e15271250b25e17
Signed-off-by: yacovm <[email protected]>
(cherry picked from commit 3da11e2)
Signed-off-by: Gari Singh <[email protected]>

Author: yacovm

core/endorser/endorser.go

@@ -185,6 +185,10 @@ func (e *Endorser) disableJavaCCInst(cid *pb.ChaincodeID, cis *pb.ChaincodeInvoc
 		return nil
 	}
 
+	if argNo >= len(cis.ChaincodeSpec.Input.Args) {
+		return errors.New("Too few arguments passed")
+	}
+
 	//the inner dep spec will contain the type
 	cds, err := putils.GetChaincodeDeploymentSpec(cis.ChaincodeSpec.Input.Args[argNo])
 	if err != nil {