Change to Object Caching in IE with XP SP2 applied

From: Don Tuer (don.tuer_at_CGI.COM)
Date: 02/25/05

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    Date:         Fri, 25 Feb 2005 13:36:24 -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:

    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:

    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 NTBUGTRAQ 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,


    NTBugtraq Editor's Note:
    Most viruses these days use spoofed email addresses. As such, using an Anti-Virus product which automatically notifies the perceived sender of a message it believes is infected may well cause more harm than good. Someone who did not actually send you a virus may receive the notification and scramble their support staff to find an infection which never existed in the first place. Suggest such notifications be disabled by whomever is responsible for your AV, or at least that the idea is considered.

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