CVE-2022-35047: Poc/CVE-2022-35047.md at main · Cvjark/Poc

Product Link

https://github.com/caryll/otfcc

POC file

https://github.com/Cvjark/Poc/files/9059900/id41_heap_buffer_overflow_sample_otfccdump%2B0x6b05aa.zip

Command to reproduce

./otfccbuild --pretty [sample file] -o /dev/null

Product name & version

last github commit code : 617837b

Problem Type

heap-buffer-overflow

Crash Detail

==112565==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x608000000178 at pc 0x0000006b05ab bp 0x7fff844968e0 sp 0x7fff844968d8
READ of size 1 at 0x608000000178 thread T0
    #0 0x6b05aa  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b05aa)
    #1 0x6b99ca  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b99ca)
    #2 0x527687  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x527687)
    #3 0x4fe3fe  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4fe3fe)
    #4 0x4f5710  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4f5710)
    #5 0x7f1fc338fc86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
    #6 0x41c549  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x41c549)

0x608000000178 is located 0 bytes to the right of 88-byte region [0x608000000120,0x608000000178)
allocated by thread T0 here:
    #0 0x4aecd8 in calloc (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4aecd8)
    #1 0x6b536b  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b536b)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b05aa) 
Shadow bytes around the buggy address:
  0x0c107fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c107fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c107fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c107fff8000: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c107fff8010: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
=>0x0c107fff8020: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00[fa]
  0x0c107fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c107fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c107fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c107fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c107fff8070: 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
==112565==ABORTING

Crash summary

SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b05aa)