Microsoft(R) Internet Explorer 5 & 6 Remote Denial of Service (DoS) using IMG & XML elements
** Inge Henriksen Security Advisory - Full Disclosure Proof of Concept at
http://ingehenriksen.blogspot.com/ **
Advisory Name:
Microsoft(R) Internet Explorer 5 & 6 Remote Denial of Service (DoS) using IMG &
XML elements
Release Date:
14. January 2006
Vulnerable Product:
Microsoft(R) Internet Explorer 5
Microsoft(R) Internet Explorer 6
Tested and Confirmed Vulerable:
Microsoft® Windows® XP Professional with Service Pack 2 and IE
6.0.2900.2180.xpsp_sp2_gdr.050301-1519
Microsoft® Windows® Server 2003 with IE 6.0.2790.0
Microsoft® Windows® 2000 Advanced Server 5.00.2195 with Service Pack 4 and IE
5.00.3700.1000
Other combinations are likely to be vulnerable, so far all systems that I have
tested had the bug.
Severity:
Medium
Discovered by:
Inge Henriksen (inge.henriksen@xxxxxxxxxxxxxxx)
http://ingehenriksen.blogspot.com/
Vendor Status:
Notified 30. December 2005, no fix at present.
Arbitrary Code Injection:
This is a null pointer dereference, so no arbitrary code injection is likely.
Thanks to H D Moore from Metasploit for help on this issue.
Overview:
I have found that Microsoft(R) Internet Explorer 5 and Microsoft(R) Internet
Explorer 6 are vulnerable
to a Denial of Service. So far all combinations of OS's and IE versions I have
tested are vulnerable.
The exploit is triggered by a bad IMG element combined with a bad XML block,
this html code can by hidden
inside a webpage etc. to cause a Denial of Service for all that tries to view
that webpage.
Full Disclosure Proof of Concept at http://ingehenriksen.blogspot.com/