CVE-2023-31981: [bug] sngrep stack buffer overflow · Issue #430 · irontec/sngrep

How to trigger
Compile the program with AddressSanitizer
Run command $ ./sngrep -N -R -I $PoC
Details
ASAN report
$./sngrep -N -R -I $PoC

Dialog count: 0=================================================================
==974123==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fda5fffe9a0 at pc 0x00000049b787 bp 0x7fda5fff98d0 sp 0x7fda5fff9098
READ of size 57344 at 0x7fda5fffe9a0 thread T1
    #0 0x49b786 in __asan_memcpy (/home/root/randomFuzz/sngrep/sngrep/sngrep_N_R_I/sngrep+0x49b786)
    #1 0x4dc7f1 in packet_set_payload /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/packet.c:147:9
    #2 0x4d1697 in parse_packet /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:430:9
    #3 0x7fda61bad466  (/lib/x86_64-linux-gnu/libpcap.so.0.8+0x23466)
    #4 0x7fda61b9bf67 in pcap_loop (/lib/x86_64-linux-gnu/libpcap.so.0.8+0x11f67)
    #5 0x4cf5c9 in capture_thread /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:1042:5
    #6 0x7fda61b6d608 in start_thread /build/glibc-SzIz7B/glibc-2.31/nptl/pthread_create.c:477:8
    #7 0x7fda61918132 in __clone /build/glibc-SzIz7B/glibc-2.31/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Address 0x7fda5fffe9a0 is located in stack of thread T1 at offset 20512 in frame
    #0 0x4d067f in parse_packet /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:321

  This frame has 3 object(s):
    [32, 20512) 'data' (line 333)
    [20768, 20772) 'size_capture' (line 337) <== Memory access at offset 20512 partially underflows this variable
    [20784, 20788) 'size_payload' (line 339) <== Memory access at offset 20512 partially underflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism, swapcontext or vfork
      (longjmp and C++ exceptions *are* supported)
Thread T1 created by T0 here:
    #0 0x486a8c in pthread_create (/home/root/randomFuzz/sngrep/sngrep/sngrep_N_R_I/sngrep+0x486a8c)
    #1 0x4d712c in capture_launch_thread /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:1027:13
    #2 0x4efb9e in main /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/main.c:433:9
    #3 0x7fda6181d082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16

SUMMARY: AddressSanitizer: stack-buffer-overflow (/home/root/randomFuzz/sngrep/sngrep/sngrep_N_R_I/sngrep+0x49b786) in __asan_memcpy
Shadow bytes around the buggy address:
  0x0ffbcbff7ce0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffbcbff7cf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffbcbff7d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffbcbff7d10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffbcbff7d20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0ffbcbff7d30: 00 00 00 00[f2]f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2
  0x0ffbcbff7d40: f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2
  0x0ffbcbff7d50: f2 f2 f2 f2 04 f2 04 f3 00 00 00 00 00 00 00 00
  0x0ffbcbff7d60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffbcbff7d70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffbcbff7d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
==974123==ABORTING