Tcpreplay v4.3.0 beta1 contains a heap-based buffer over-read. The getnextpacket() function in the sendpackets.c file uses the memcpy() function unsafely to copy sequences from the source buffer pktdata to the destination (prevpacket)->pktdata. This will result in a Denial of Service (DoS) and potentially Information Exposure when the application attempts to process a file.