Heapoverflow in decompile.c:370

[cuanduo]

./swftocxx $POC
poc.zip

asan output

root@ubuntu:/home/tim/asan/libming/util# ./swftocxx crashes/008-heap-over-swf-out_of_bound-idx\:0x1341-0x0 
header indicates a filesize of 522 but filesize is 2748
#include <mingpp.h>


main(){
SWFMovie* m = new SWFMovie(48);

Ming_setScale(1.0);
m->setRate(48.187500);
m->setDimension(3992, 3680);

// SWF_SETBACKGROUNDCOLOR 
m->setBackground(0x30, 0x30, 0x30);

// SWF_DEFINESPRITE 

	//  MovieClip 12336 
SWFMovieClip* character12336 = new SWFMovieClip(); // 12336 frames 

// SWF_END 

// SWF_EXPORTASSETS 
m->addExport(character12336,"0000000000000000000");
m->writeExports();

// SWF_INITACTION 
// Might be more appropriate to use addInitAction here
m->add(new SWFInitAction(=================================================================
==79668==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60b000000158 at pc 0x557eae4e9cef bp 0x7ffd34d753b0 sp 0x7ffd34d753a0
READ of size 8 at 0x60b000000158 thread T0
    #0 0x557eae4e9cee in getString /home/tim/asan/libming/util/decompile.c:370
    #1 0x557eae4ec5f6 in decompilePUSHPARAM /home/tim/asan/libming/util/decompile.c:853
    #2 0x557eae4efc3f in decompileSETMEMBER /home/tim/asan/libming/util/decompile.c:1795
    #3 0x557eae4f7d75 in decompileAction /home/tim/asan/libming/util/decompile.c:3295
    #4 0x557eae4f833e in decompileActions /home/tim/asan/libming/util/decompile.c:3494
    #5 0x557eae4f5e57 in decompileDEFINEFUNCTION /home/tim/asan/libming/util/decompile.c:2834
    #6 0x557eae4f7f56 in decompileAction /home/tim/asan/libming/util/decompile.c:3354
    #7 0x557eae4f833e in decompileActions /home/tim/asan/libming/util/decompile.c:3494
    #8 0x557eae4f4749 in decompileIF /home/tim/asan/libming/util/decompile.c:2656
    #9 0x557eae4f7eb3 in decompileAction /home/tim/asan/libming/util/decompile.c:3335
    #10 0x557eae4f833e in decompileActions /home/tim/asan/libming/util/decompile.c:3494
    #11 0x557eae4f8474 in decompile5Action /home/tim/asan/libming/util/decompile.c:3517
    #12 0x557eae4e59b8 in outputSWF_INITACTION /home/tim/asan/libming/util/outputscript.c:1860
    #13 0x557eae4e6aa2 in outputBlock /home/tim/asan/libming/util/outputscript.c:2083
    #14 0x557eae4e7b98 in readMovie /home/tim/asan/libming/util/main.c:281
    #15 0x557eae4e8332 in main /home/tim/asan/libming/util/main.c:354
    #16 0x7f569f5c4b6a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26b6a)
    #17 0x557eae4da479 in _start (/home/tim/asan/libming/util/swftocxx+0x14479)

0x60b000000158 is located 0 bytes to the right of 104-byte region [0x60b0000000f0,0x60b000000158)
allocated by thread T0 here:
    #0 0x7f569f9ff448 in malloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10c448)
    #1 0x557eae502083 in parseSWF_ACTIONRECORD /home/tim/asan/libming/util/parser.c:1124
    #2 0x557eae516a85 in parseSWF_INITACTION /home/tim/asan/libming/util/parser.c:2980
    #3 0x557eae4e85c3 in blockParse /home/tim/asan/libming/util/blocktypes.c:145
    #4 0x557eae4e7ae7 in readMovie /home/tim/asan/libming/util/main.c:269
    #5 0x557eae4e8332 in main /home/tim/asan/libming/util/main.c:354
    #6 0x7f569f5c4b6a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26b6a)

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/tim/asan/libming/util/decompile.c:370 in getString
Shadow bytes around the buggy address:
  0x0c167fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c167fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c167fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c167fff8000: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x0c167fff8010: fd fd fd fd fd fa fa fa fa fa fa fa fa fa 00 00
=>0x0c167fff8020: 00 00 00 00 00 00 00 00 00 00 00[fa]fa fa fa fa
  0x0c167fff8030: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
  0x0c167fff8040: fd fa fa fa fa fa fa fa fa fa fd fd fd fd fd fd
  0x0c167fff8050: fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa fa
  0x0c167fff8060: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa
  0x0c167fff8070: fa fa fa fa fa fa fd fd fd fd fd fd fd fd fd fd
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
==79668==ABORTING