A heap-buffer-overflow has occurred when running program mp4info.

[swtkiwi]

A heap-buffer-overflow has occurred when running program mp4info.

=================================================================
==10130==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000ee14 at pc 0x000000483bfb bp 0x7fff7c327330 sp 0x7fff7c327320
READ of size 1 at 0x60200000ee14 thread T0
    #0 0x483bfa in AP4_Mp4AudioDsiParser::ReadBits(unsigned int) /home/swt_fuzz/Bento4/Source/C++/Codecs/Ap4Mp4AudioInfo.cpp:66
    #1 0x483bfa in AP4_Mp4AudioDecoderConfig::ParseExtension(AP4_Mp4AudioDsiParser&) /home/swt_fuzz/Bento4/Source/C++/Codecs/Ap4Mp4AudioInfo.cpp:136
    #2 0x4847aa in AP4_Mp4AudioDecoderConfig::Parse(unsigned char const*, unsigned int) /home/swt_fuzz/Bento4/Source/C++/Codecs/Ap4Mp4AudioInfo.cpp:314
    #3 0x546ba0 in AP4_MpegAudioSampleDescription::GetCodecString(AP4_String&) /home/swt_fuzz/Bento4/Source/C++/Core/Ap4SampleDescription.cpp:750
    #4 0x447cd1 in ShowMpegAudioSampleDescription /home/swt_fuzz/Bento4/Source/C++/Apps/Mp4Info/Mp4Info.cpp:303
    #5 0x4527e6 in ShowSampleDescription_Text /home/swt_fuzz/Bento4/Source/C++/Apps/Mp4Info/Mp4Info.cpp:412
    #6 0x456999 in ShowSampleDescription /home/swt_fuzz/Bento4/Source/C++/Apps/Mp4Info/Mp4Info.cpp:783
    #7 0x456999 in ShowTrackInfo_Text /home/swt_fuzz/Bento4/Source/C++/Apps/Mp4Info/Mp4Info.cpp:1092
    #8 0x457aaf in ShowTrackInfo /home/swt_fuzz/Bento4/Source/C++/Apps/Mp4Info/Mp4Info.cpp:1213
    #9 0x457aaf in ShowTracks /home/swt_fuzz/Bento4/Source/C++/Apps/Mp4Info/Mp4Info.cpp:1323
    #10 0x44030d in main /home/swt_fuzz/Bento4/Source/C++/Apps/Mp4Info/Mp4Info.cpp:1587
    #11 0x7f63d94de82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #12 0x446508 in _start (/home/swt_fuzz/Bento4/cmakebuild/mp4info+0x446508)

0x60200000ee14 is located 0 bytes to the right of 4-byte region [0x60200000ee10,0x60200000ee14)
allocated by thread T0 here:
    #0 0x7f63d9eb96b2 in operator new[](unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x996b2)
    #1 0x538d85 in AP4_DataBuffer::AP4_DataBuffer(void const*, unsigned int) /home/swt_fuzz/Bento4/Source/C++/Core/Ap4DataBuffer.cpp:68

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/swt_fuzz/Bento4/Source/C++/Codecs/Ap4Mp4AudioInfo.cpp:66 AP4_Mp4AudioDsiParser::ReadBits(unsigned int)
Shadow bytes around the buggy address:
  0x0c047fff9d70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9d80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9d90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9da0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9db0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c047fff9dc0: fa fa[04]fa fa fa 04 fa fa fa 01 fa fa fa fd fa
  0x0c047fff9dd0: fa fa fd fa fa fa 04 fa fa fa fd fd fa fa 00 fa
  0x0c047fff9de0: fa fa 04 fa fa fa 00 05 fa fa fd fd fa fa 04 fa
  0x0c047fff9df0: fa fa fd fd fa fa 00 00 fa fa 00 00 fa fa 00 00
  0x0c047fff9e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9e10: 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
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  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
==10130==ABORTING

he testing program is mp4info.
And the input file has been put at:
https://github.com/fCorleone/fuzz_programs/blob/master/Bento4/test11.dms

[fgeek]

Someone requested a CVE for this, which got assigned CVE-2018-14589. Reproduced in 5a0ce80.