[2019-08-06] - Found with American Fuzzy Lop - CVE-2019-14732

Multiple heap-based buffer overflows in Ca2mLoader::load(), in src/a2m.cpp.

```
=================================================================
==6688==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x63000000fc28 at pc 0x7f43e5614913 bp 0x7ffe7780f470 sp 0x7ffe7780f468
WRITE of size 1 at 0x63000000fc28 thread T0
    #0 0x7f43e5614912 in Ca2mLoader::load(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, CFileProvider const&) /home/fcambus/adplug/src/a2m.cpp:106:37
    #1 0x7f43e56341d5 in CAdPlug::factory(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Copl*, CPlayers const&, CFileProvider const&) /home/fcambus/adplug/src/adplug.cpp:169:10
    #2 0x4fcd62 in play(char const*, Player*, int) /home/fcambus/adplay-unix/src/adplay.cc:309:11
    #3 0x4fbaf4 in main /home/fcambus/adplay-unix/src/adplay.cc:544:5
    #4 0x7f43e4e7209a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
    #5 0x41f759 in _start (/home/fcambus/reps2/adplay+0x41f759)

0x63000000fc28 is located 0 bytes to the right of 63528-byte region [0x630000000400,0x63000000fc28)
allocated by thread T0 here:
    #0 0x4f6972 in operator new[](unsigned long) (/home/fcambus/reps2/adplay+0x4f6972)
    #1 0x7f43e5614614 in Ca2mLoader::load(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, CFileProvider const&) /home/fcambus/adplug/src/a2m.cpp:99:13
    #2 0x7f43e56341d5 in CAdPlug::factory(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Copl*, CPlayers const&, CFileProvider const&) /home/fcambus/adplug/src/adplug.cpp:169:10
    #3 0x4fcd62 in play(char const*, Player*, int) /home/fcambus/adplay-unix/src/adplay.cc:309:11
    #4 0x4fbaf4 in main /home/fcambus/adplay-unix/src/adplay.cc:544:5
    #5 0x7f43e4e7209a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/fcambus/adplug/src/a2m.cpp:106:37 in Ca2mLoader::load(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, CFileProvider const&)
Shadow bytes around the buggy address:
  0x0c607fff9f30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c607fff9f40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c607fff9f50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c607fff9f60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c607fff9f70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c607fff9f80: 00 00 00 00 00[fa]fa fa fa fa fa fa fa fa fa fa
  0x0c607fff9f90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c607fff9fa0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c607fff9fb0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c607fff9fc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c607fff9fd0: 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
==6688==ABORTING
```

```
=================================================================
==6686==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61a000000508 at pc 0x7efe60571e7c bp 0x7ffe914318d0 sp 0x7ffe914318c8
WRITE of size 1 at 0x61a000000508 thread T0
    #0 0x7efe60571e7b in Ca2mLoader::load(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, CFileProvider const&) /home/fcambus/adplug/src/a2m.cpp:184:35
    #1 0x7efe6058f1d5 in CAdPlug::factory(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Copl*, CPlayers const&, CFileProvider const&) /home/fcambus/adplug/src/adplug.cpp:169:10
    #2 0x4fcd62 in play(char const*, Player*, int) /home/fcambus/adplay-unix/src/adplay.cc:309:11
    #3 0x4fbaf4 in main /home/fcambus/adplay-unix/src/adplay.cc:544:5
    #4 0x7efe5fdcd09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
    #5 0x41f759 in _start (/home/fcambus/reps2/adplay+0x41f759)

0x61a000000508 is located 0 bytes to the right of 1160-byte region [0x61a000000080,0x61a000000508)
allocated by thread T0 here:
    #0 0x4f6972 in operator new[](unsigned long) (/home/fcambus/reps2/adplay+0x4f6972)
    #1 0x7efe60570f6f in Ca2mLoader::load(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, CFileProvider const&) /home/fcambus/adplug/src/a2m.cpp:152:13
    #2 0x7efe6058f1d5 in CAdPlug::factory(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Copl*, CPlayers const&, CFileProvider const&) /home/fcambus/adplug/src/adplug.cpp:169:10
    #3 0x4fcd62 in play(char const*, Player*, int) /home/fcambus/adplay-unix/src/adplay.cc:309:11
    #4 0x4fbaf4 in main /home/fcambus/adplay-unix/src/adplay.cc:544:5
    #5 0x7efe5fdcd09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/fcambus/adplug/src/a2m.cpp:184:35 in Ca2mLoader::load(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, CFileProvider const&)
Shadow bytes around the buggy address:
  0x0c347fff8050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c347fff8060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c347fff8070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c347fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c347fff8090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c347fff80a0: 00[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c347fff80b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c347fff80c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c347fff80d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c347fff80e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c347fff80f0: 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
==6686==ABORTING
```