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CVE-2019-16452 Fails #1

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herronto opened this issue Jan 19, 2021 · 2 comments
Open

CVE-2019-16452 Fails #1

herronto opened this issue Jan 19, 2021 · 2 comments

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@herronto
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I believe it is failing due to SPRAY_IDX being zero. T[2] doesn't appear to exist.

Sound object and element buffer was able to be reclaimed, WRITE_ARRAY_ADDR was 2a6ab348, SPRAY_IDX was 0, ESCRIPT_BASE was -2784d0, assert pops up.

Any help with this would be appreciated.

@herronto
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herronto commented Jan 19, 2021

Apologies, the error was further down. The assert was popping up because ESCRIPT_BASE was negative. That was happening because myread(WRITE_ARRAY_ADDR+12) evaluates to 0, which comes from myread returning s2h(T[2]).

@zuypt
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zuypt commented Jan 22, 2021

WRITE_ARRAY_ADDR looks correct so maybe the exploit fails to search for the ESCRIPT_BASE. You can debug the exploit to figure out why

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