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JScript 5.7 RegExpBase::FBadHeader Use-After-Free

Posted by deepcore on October 16, 2015 – 10:46 am

Recompiling the regular expression pattern during a replace in JScript version 5.7 (MSIE 8) can cause the code to reuse a freed string, but only if the string is freed from the cache by allocating and freeing a number of strings of certain size.


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