tcpdump: Buffer over-read in print-icmp6.c

The Rx parser in tcpdump before 4.9.3 has a buffer over-read in print-rx.c:rxcachefind and rxcacheinsert...

tcpdump buffer overflow vulnerability (CNVD-2019-40789)

tcpdump is a set of sniffing tools from Tcpdump team running under command line. The tool is mainly used for packet analysis and network traffic capture etc. The 'rxcachefind' and 'rxcacheinsert' functions in the print-rx.c file of the Rx parser in versions of tcpdump prior to 4.9.3 have a buffer...