Heap-buffer-overflow on dcputs

[legend-issue]

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==105317==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62e000082400 at pc 0x7f7de115606e bp 0x7ffedc440790 sp 0x7ffedc43ff38
WRITE of size 45 at 0x62e000082400 thread T0
    #0 0x7f7de115606d in strcat (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x7306d)
    #1 0x40f823 in dcputs /home/aflgo/libming-ming-0_4_8/util/decompile.c:104
    #2 0x41db61 in decompileIMPLEMENTS /home/aflgo/libming-ming-0_4_8/util/decompile.c:3094
    #3 0x41e515 in decompileAction /home/aflgo/libming-ming-0_4_8/util/decompile.c:3375
    #4 0x41e5cc in decompileActions /home/aflgo/libming-ming-0_4_8/util/decompile.c:3401
    #5 0x41e6f9 in decompile5Action /home/aflgo/libming-ming-0_4_8/util/decompile.c:3423
    #6 0x40b6bf in outputSWF_DOACTION /home/aflgo/libming-ming-0_4_8/util/outputscript.c:1547
    #7 0x40dc79 in outputBlock /home/aflgo/libming-ming-0_4_8/util/outputscript.c:2079
    #8 0x40ecab in readMovie /home/aflgo/libming-ming-0_4_8/util/main.c:277
    #9 0x40f3da in main /home/aflgo/libming-ming-0_4_8/util/main.c:350
    #10 0x7f7de051082f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #11 0x401b18 in _start (/home/aflgo/libming-ming-0_4_8/util/.libs/lt-swftotcl+0x401b18)

0x62e000082400 is located 0 bytes to the right of 40960-byte region [0x62e000078400,0x62e000082400)
allocated by thread T0 here:
    #0 0x7f7de117b79a in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9879a)
    #1 0x40f75a in dcinit /home/aflgo/libming-ming-0_4_8/util/decompile.c:84
    #2 0x41e61e in decompile5Action /home/aflgo/libming-ming-0_4_8/util/decompile.c:3415
    #3 0x40b6bf in outputSWF_DOACTION /home/aflgo/libming-ming-0_4_8/util/outputscript.c:1547
    #4 0x40dc79 in outputBlock /home/aflgo/libming-ming-0_4_8/util/outputscript.c:2079
    #5 0x40ecab in readMovie /home/aflgo/libming-ming-0_4_8/util/main.c:277
    #6 0x40f3da in main /home/aflgo/libming-ming-0_4_8/util/main.c:350
    #7 0x7f7de051082f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: heap-buffer-overflow ??:0 strcat
Shadow bytes around the buggy address:
  0x0c5c80008430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c5c80008440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c5c80008450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c5c80008460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c5c80008470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c5c80008480:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c5c80008490: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c5c800084a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c5c800084b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c5c800084c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c5c800084d0: 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
==105317==ABORTING

swftotcl $poc
https://github.com/legend-issue/pocs/blob/master/libming/id:000235%2Csig:11%2Csrc:000000%2Cop:havoc%2Crep:4