[Bug]heap-buff-overflow in tcpreplay with get_next_packet()

[zzuf666]

Describe the bug
heap-buff-overflow in tcpreplay with get_next_packet()

ASAN report

=================================================================
==75256==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x603000000210 at pc 0x000000495b27 bp 0x7ffd73bf07f0 sp 0x7ffd73beffb8
READ of size 74 at 0x603000000210 thread T0
    #0 0x495b26 in __asan_memcpy (/programs/tcpreplay/asan/usr/local/bin/tcpreplay+0x495b26)
    #1 0x4c7f74 in get_next_packet /programs/tcpreplay/tcpreplay-4.3.3/src/send_packets.c:1060:21
    #2 0x4c7724 in preload_pcap_file /programs/tcpreplay/tcpreplay-4.3.3/src/send_packets.c:442:23
    #3 0x4ce64c in main/programs/tcpreplay/tcpreplay-4.3.3/src/tcpreplay.c:126:13
    #4 0x7faac54110b2 in __libc_start_main /build/glibc-YYA7BZ/glibc-2.31/csu/../csu/libc-start.c:308:16
    #5 0x41c65d in _start (/programs/tcpreplay/asan/usr/local/bin/tcpreplay+0x41c65d)

0x603000000210 is located 0 bytes to the right of 32-byte region [0x6030000001f0,0x603000000210)
allocated by thread T0 here:
    #0 0x4969e9 in realloc (/programs/tcpreplay/asan/usr/local/bin/tcpreplay+0x4969e9)
    #1 0x7faac57bcd77  (/lib/x86_64-linux-gnu/libpcap.so.0.8+0x23d77)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/programs/tcpreplay/asan/usr/local/bin/tcpreplay+0x495b26) in __asan_memcpy
Shadow bytes around the buggy address:
  0x0c067fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c067fff8000: fa fa fd fd fd fa fa fa fd fd fd fd fa fa fd fd
  0x0c067fff8010: fd fd fa fa fd fd fd fa fa fa fd fd fd fa fa fa
  0x0c067fff8020: fd fd fd fa fa fa fd fd fd fa fa fa fd fd fd fd
  0x0c067fff8030: fa fa 00 00 02 fa fa fa fd fd fd fd fa fa 00 00
=>0x0c067fff8040: 00 00[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
  Shadow gap:              cc
==75256==ABORTING

To Reproduce
Steps to reproduce the behavior:

1. install replay 4.3.3
2. run replay as:
   tcpreplay -i eth0 -tK [poc_file]

Expected behavior
refuse abnormal input and exit, without throwing bug information

System

• OS: Ubuntu_20.04.1 x86_64
• Tcpreplay Version 4.3.3
  tcpreplay -V

    tcpreplay version: 4.3.3 (build git:v4.3.3)
    Copyright 2013-2018 by Fred Klassen <tcpreplay at appneta dot com> - AppNeta
    Copyright 2000-2012 by Aaron Turner <aturner at synfin dot net>
    The entire Tcpreplay Suite is licensed under the GPLv3
    Cache file supported: 04
    Not compiled with libdnet.
    Compiled against libpcap: 1.9.1
    64 bit packet counters: enabled
    Verbose printing via tcpdump: disabled
    Packet editing: disabled
    Fragroute engine: disabled
    Injection method: PF_PACKET send()
    Not compiled with netma

Additional context
poc_file
tcpreplay_crash_1.zip

[fklassen]

Fix use of len instead of caplen to prevent copying uninitialized data. Fixed in PR #639