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Object Caching with IE 6 XP SP2

from [Don Tuer] Network Security [Permanent Link]
Subject: Object Caching with IE 6 XP SP2
Date: Fri, 25 Feb 2005 15:44:17 -0500 
One item that Microsoft has changed in IE with XP SP2 is the disabling
of Object Caching. Very little information exists on the overall
security implications of Object Caching although Greymagic did release
an advisory on possible exploits using Object Caching:
http://www.greymagic.com/security/advisories/gm012-ie/

Disabling Object Caching seems like a no brainer but it looks like it
might cause subtle errors with JavaScript since scripts will return
different results depending if it's on or off. See KB below for details:
http://support.microsoft.com/Default.aspx?kbid=884697
http://support.microsoft.com/Default.aspx?kbid=884698

NOTE: The sample script in kb 884697 needs to be changed to work
correctly (ie show the differences). You need to change the frame
reference from 2 to 1. 

My question to the readers is if anyone has seen issues with their
JavaScript after disabling Object Caching and if anyone can shed some
more light on the real security significance of leaving Object Caching
enabled. 

Thanks in advance, 

Don
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