Heap-Buffer-Overflow with ASAN in avcinfo

[Yhcrown]

Hi, developers of Bento4: I test the binary avcinfo instrumented with ASAN. Unfortunately, it incurred a crash with the following error information. Any help would be greatly appreciated from you:

=================================================================
==105621==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000000014 at pc 0x7f6ffd9b4397 bp 0x7ffc5d804f40 sp 0x7ffc5d8046e8
READ of size 8 at 0x602000000014 thread T0
    #0 0x7f6ffd9b4396 in __interceptor_memcpy ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:827
    #1 0x564248aba9dc in AP4_BitStream::WriteBytes(unsigned char const*, unsigned int) (/workspace/test/validate/Bento4/cmakebuild/avcinfo+0x69dc)
    #2 0x564248ab673e in main (/workspace/test/validate/Bento4/cmakebuild/avcinfo+0x273e)
    #3 0x7f6ffd448d8f  (/lib/x86_64-linux-gnu/libc.so.6+0x29d8f)
    #4 0x7f6ffd448e3f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e3f)
    #5 0x564248ab6904 in _start (/workspace/test/validate/Bento4/cmakebuild/avcinfo+0x2904)

0x602000000014 is located 0 bytes to the right of 4-byte region [0x602000000010,0x602000000014)
allocated by thread T0 here:
    #0 0x7f6ffda30337 in operator new[](unsigned long) ../../../../src/libsanitizer/asan/asan_new_delete.cpp:102
    #1 0x564248abb579 in AP4_DataBuffer::SetDataSize(unsigned int) (/workspace/test/validate/Bento4/cmakebuild/avcinfo+0x7579)

SUMMARY: AddressSanitizer: heap-buffer-overflow ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:827 in __interceptor_memcpy
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
  Shadow gap:              cc
==105621==ABORTING

Crash input:

https://github.com/Yhcrown/fuzzing-crashes/blob/main/validated/avcinfo/1

Verification steps：

git clone https://github.com/axiomatic-systems/Bento4
cd Bento4/
mkdir check_build && cd check_build
cmake ../ -DCMAKE_C_COMPILER=clang  -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_FLAGS="-fsanitize=address" -DCMAKE_CXX_FLAGS="-fsanitize=address" -DCMAKE_BUILD_TYPE=Release
make -j 
./avcinfo ./crash_input

enviroment:

Ubuntu 22.04 LTS Linux lab-pro 4.15.0-147-generic gcc (Ubuntu 11.2.0-19ubuntu1) 11.2.0 Ubuntu clang version 14.0.6

Thanks & Best regards !