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swfextract swf_FoldSprite() Null-pointer access #27

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lcatro opened this issue Jun 11, 2017 · 0 comments
Closed

swfextract swf_FoldSprite() Null-pointer access #27

lcatro opened this issue Jun 11, 2017 · 0 comments

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@lcatro
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lcatro commented Jun 11, 2017

Crash : https://raw.githubusercontent.com/lcatro/My_PoC/master/swftools/swfextract_crash_swf_FoldSprite_44C9E8

Trigger : ./swfextract swftools/swfextract_crash_swf_FoldSprite_44C9E8

Crash Detail :

`
fuzzer@ub16x64:~/fuzzing/swftools/src$ ./swfextract swftools/swfextract_crash_swf_FoldSprite_44C9E8
rfxswf: Warning: Short read (tagid 0). File truncated?
Objects in file swftools/swfextract_crash_swf_FoldSprite_44C9E8:
ASAN:SIGSEGV

==18840==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x00000040ffb6 bp 0x60600000ec60 sp 0x7fffda4aae80 T0)
#0 0x40ffb5 in swf_FoldSprite (/home/fuzzer/fuzzing/swftools/src/swfextract+0x40ffb5)
#1 0x410150 in swf_FoldAll (/home/fuzzer/fuzzing/swftools/src/swfextract+0x410150)
#2 0x403a5a in listObjects (/home/fuzzer/fuzzing/swftools/src/swfextract+0x403a5a)
#3 0x40580e in main (/home/fuzzer/fuzzing/swftools/src/swfextract+0x40580e)
#4 0x7fef97fd482f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#5 0x402208 in _start (/home/fuzzer/fuzzing/swftools/src/swfextract+0x402208)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV ??:0 swf_FoldSprite
==18840==ABORTING
`

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