I think it's pretty safe to say that the intelligence agencies of almost all Cold War era allies are still close partners. Governments on either side still generally regard the other side as potential adversaries.
Leninist (and Stalinist, etc.) states, of course, liked to put "socialist" and/or "democratic" in their names, but the entire Leninist concept of party vanguardism is intrinsically both anti-democratic and anti-socialist.