It’s not an urban legend. That “Mole” was Eli Cohen (Eliyahu/Elijah), an Egyptian born Jew, who became the advisor to the Syrian Minister of Defense. I believe that he was found out by a quirk of fate power outage in Damascus, during a routine radio transmission, but I have forgotten the details. He was a good “friend” of Assad the Elder, who became so embarrassed that nothing, not a huge ransom, or pleas from nations around the world, could dissuade him from having Cohen publicly hanged.
Google the name, ELI COHEN. Should be an interesting read.
Thanks for the tip. I think it was on the History Channel’s airing of the 1967 War. I broke up when I heard it, then had second thoughts and wondered if it was an exaggeration.