The Trapster DNS honeypot's decode_labels() function recursively processes DNS compression pointers without cycle detection or depth limits. An attacker can send a single unauthenticated UDP packet with malformed compression pointers that cause unbounded recursion, triggering a RecursionError. This exception escapes handling, aborting packet processing and flooding logs, resulting in a denial of service against the DNS honeypot module. The vulnerability affects versions prior to 1.2.2 and has a medium severity rating (CVSS 5.3).