CVE-2022-35040: Poc/CVE-2022-35040.md at main · Cvjark/Poc

Product Link

https://github.com/caryll/otfcc

POC file

https://github.com/Cvjark/Poc/files/9059889/id19_heap_buffer_overflow_sample_otfccdump%2B0x6b5567.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

=================================================================
==107908==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6120000005cb at pc 0x0000006b5568 bp 0x7ffc8bfccd30 sp 0x7ffc8bfccd28
READ of size 1 at 0x6120000005cb thread T0
    #0 0x6b5567  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b5567)
    #1 0x6b6b99  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b6b99)
    #2 0x5265aa  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x5265aa)
    #3 0x4fe3fe  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4fe3fe)
    #4 0x4f5710  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4f5710)
    #5 0x7fc74767cc86 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)

0x6120000005cb is located 0 bytes to the right of 267-byte region [0x6120000004c0,0x6120000005cb)
allocated by thread T0 here:
    #0 0x4aecd8 in calloc (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4aecd8)
    #1 0x6b69c5  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b69c5)
    #2 0x4fe3fe  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4fe3fe)
    #3 0x4f5710  (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4f5710)
    #4 0x7fc74767cc86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310

SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b5567) 
Shadow bytes around the buggy address:
  0x0c247fff8060: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x0c247fff8070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c247fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa fa
  0x0c247fff8090: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x0c247fff80a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c247fff80b0: 00 00 00 00 00 00 00 00 00[03]fa fa fa fa fa fa
  0x0c247fff80c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c247fff80d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c247fff80e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c247fff80f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c247fff8100: 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
==107908==ABORTING

Crash summary

SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b5567)