During the COVID lockdown, my friends and I participated in an All India Attack Defence CTF organized by Cisco wherein we secured the 2nd place
During the final hour, we found a buffer overflow exploit in a string slicing algorithm that caused the other team’s applications to panic and crash, thereby catapulting us from near last to second. The exploit was difficult to figure out as it was deep within the code and we were accused of DOS’ing the servers.
Once the time was up, the organizers accepted our exploit and we received our prize money and goodies