An exploitable file write vulnerability exists in the memory module functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before

An exploitable file write vulnerability exists in the memory module functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before. A specially crafted packet can cause a file write resulting in a new program being written to the memory module. An attacker can send an unauthenticated packet to trigger this vulnerability.