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Sophos 9's Buffer Overflow Protection System (BOPS) and Internet Explorer 8

Hi,

Just wondering if anyone else has noticed any odd behavior of Internet Explorer since upgrading from Sophos 7 to Sophos 9?

We've found that on a substantial portion of our machines (Windows XP, Windows Server 2003, and possibly even Windows 7) suffer from a reproducible but statistical-in-nature deadlock in Internet Explorer.

I originally reported the problem on Microsoft's Technet forums (http://social.technet.microsoft.com/Forums/en/w7itpronetworking/thread/ef0a7af9-26b9-45b5-a05e-0cfd88c42aee) however it soon became clear that the culprit was Sophos_detoured.dll, part of the BOPS in Sophos 9 (and the timeline of the problem occurred very shortly after upgrading substantial portions of our machines to Sophos 9 from the original Sophos 7 clients they had installed.)

I notice someone else on the MS forums said they had the same problem, so I thought I'd post this here to achieve two things:

1. If other people experience this problem, they may know what's causing it instead of tearing their hair out about it

and

2. Perhaps other people have suggestions or advice

I should point out that we have an open ticket with Sophos about this at the moment [#2345512], and I've discovered at least two workarounds (which are both effectively the same workaround from different directions), so I'm not necessarily after assistance, just healthy discussion and information sharing.

As an aside, after I posted about this issue in a similar way on our internal forums, another IT staff member from a completely unrelated area responded along the lines of "Ahhh! That's what's causing it! We've just been reformatting and re-installing windows since we were stumped by the problems, and we never connected it with the recent upgrade to 9!"

And finally, the easiest workaround to the problem is to disable BOPS and reboot. There's a reghack that achieves effectively the same thing involving the AppInit_DLLs key (see the referenced microsoft forum post for details if you're brave.)

Cheers,

Jon.

:3208


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  • Jon is spot on, essentially we need to check if the change to appinit fixes the issue in relation to Citrix, if not we will need to dig a bit further.

    Generally the solution isnt always a one size fixes all, and would recommend logging case with myself or my colleagues via support@sophos.com if you can include answers to my previous post (I know its a pain but it allows us to build a bigger picture of what you are seeing) and reduces the need to ask question after question.

    Certainly if people are experiencing issues with SAV 9.5 that were not present with SAV 7.6 or 9.0.x we need to know so we can fix them for you.

    :3891
Reply
  • Jon is spot on, essentially we need to check if the change to appinit fixes the issue in relation to Citrix, if not we will need to dig a bit further.

    Generally the solution isnt always a one size fixes all, and would recommend logging case with myself or my colleagues via support@sophos.com if you can include answers to my previous post (I know its a pain but it allows us to build a bigger picture of what you are seeing) and reduces the need to ask question after question.

    Certainly if people are experiencing issues with SAV 9.5 that were not present with SAV 7.6 or 9.0.x we need to know so we can fix them for you.

    :3891
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