IE 10 and 11 freeze after KB2962872 update with the following scenario:
Upload a file to a server, the server responses with a file download (like a simple conversion service).
Result: When the server is sending the file, IE freezes and process iexplore.exe is running with high CPU load.
IE 8 and 9 are not affected. And IE 10 and 11 without the KB2962872 update also work fine.
If IE 11 with KB2962872 is running in InPrivate mode, then it also works. In contrast to that, IE 10 with KB2962872 in InPrivate mode does not work.
Demo:
http://sharedspace.lima-city.de/upload.php
Just select any file. After clicking on "Upload", an empty text file "test.txt" should be returned. Instead nothing happens and the browser crashes/freezes.
Sourcecode:
upload.php
<form enctype="multipart/form-data" action="./service.php" method="POST"><input name="file" type="file" /><br><input type="submit" value="Upload" name="upload"/></form>
service.php
<?php header('Content-Type: application/x-download'); header('Content-DisPosition: attachment; filename="test.txt"'); ?>
Any solution so solve this problem?