kill: 'kill -1' parsed as PID -1, sending SIGTERM to all processes (system crash / DoS)
kill -1 is incorrectly parsed as a positional pid = -1; combined with the default SIGTERM this calls kill(-1, SIGTERM), signaling nearly every process the caller can see. GNU kill recognizes -1/-9 as signals and reports "not enough arguments". $ kill -1 # uutils: kill(-1, SIGTERM) -> mass termination / crash $ kill -1 # GNU: kill: not enough arguments Impact: a user running kill -1 mass-terminates processes, potentially crashing …