CVE-2023-31982: [bug] sngrep heap buffer overflow · Issue #431 · 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=================================================================
==974271==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000080a0 at pc 0x0000004d385c bp 0x7f69535f92f0 sp 0x7f69535f92e8
READ of size 2 at 0x6020000080a0 thread T1
    #0 0x4d385b in capture_packet_reasm_ip /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:678:49
    #1 0x4d0d09 in parse_packet /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:367:17
    #2 0x7f695522a466  (/lib/x86_64-linux-gnu/libpcap.so.0.8+0x23466)
    #3 0x7f6955218f67 in pcap_loop (/lib/x86_64-linux-gnu/libpcap.so.0.8+0x11f67)
    #4 0x4cf5c9 in capture_thread /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:1042:5
    #5 0x7f69551ea608 in start_thread /build/glibc-SzIz7B/glibc-2.31/nptl/pthread_create.c:477:8
    #6 0x7f6954f95132 in __clone /build/glibc-SzIz7B/glibc-2.31/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:95

0x6020000080a0 is located 15 bytes to the right of 1-byte region [0x602000008090,0x602000008091)
allocated by thread T1 here:
    #0 0x49c3cd in __interceptor_malloc (/home/root/randomFuzz/sngrep/sngrep/sngrep_N_R_I/sngrep+0x49c3cd)
    #1 0x4dbb59 in packet_add_frame /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/packet.c:123:19
    #2 0x4d31ee in capture_packet_reasm_ip /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:639:9
    #3 0x4d0d09 in parse_packet /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:367:17
    #4 0x7f695522a466  (/lib/x86_64-linux-gnu/libpcap.so.0.8+0x23466)

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 0x7f6954e9a082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/root/FuzzDateset/sngrep/sngrep-1.6.0/src/capture.c:678:49 in capture_packet_reasm_ip
Shadow bytes around the buggy address:
  0x0c047fff8fc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8fd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8fe0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8ff0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9000: fa fa 00 00 fa fa fd fa fa fa fd fa fa fa 00 00
=>0x0c047fff9010: fa fa 01 fa[fa]fa fd fd fa fa 00 00 fa fa 01 fa
  0x0c047fff9020: fa fa 00 00 fa fa 01 fa fa fa 00 00 fa fa 01 fa
  0x0c047fff9030: fa fa 00 00 fa fa 01 fa fa fa 00 00 fa fa 01 fa
  0x0c047fff9040: fa fa 00 00 fa fa 01 fa fa fa 00 00 fa fa 01 fa
  0x0c047fff9050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9060: 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
==974271==ABORTING