heap over flow

[bird8693]

enviroment

ubuntu18.04

requirement

compile with asan

command

exif poc

poc

https://drive.google.com/file/d/1dhAwQLnuUouzrW7QJnbhjWrLlzaYS0E7/view?usp=sharing

output

==32823==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000000014 at pc 0x55945eba4ad6 bp 0x7ffe35844400 sp 0x7ffe358443f0
WRITE of size 4 at 0x602000000014 thread T0
    #0 0x55945eba4ad5 in parseIFD /home/fuzz/exif/exif.c:2419
    #1 0x55945eba5c62 in createIfdTableArray /home/fuzz/exif/exif.c:271
    #2 0x55945eb9444c in main /home/fuzz/exif/sample_main.c:63
    #3 0x7efeca5e9bf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)
    #4 0x55945eb95279 in _start (/home/micro/all/found/exif/exif_asan+0x6279)

0x602000000014 is located 0 bytes to the right of 4-byte region [0x602000000010,0x602000000014)
allocated by thread T0 here:
    #0 0x7efecaa97b40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)
    #1 0x55945eb9d4cd in parseIFD /home/fuzz/exif/exif.c:2401

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/fuzz/exif/exif.c:2419 in parseIFD
Shadow bytes around the buggy address:
  0x0c047fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c047fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c047fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c047fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c047fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c047fff8000: fa fa[04]fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8050: 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
==32823==ABORTING