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Possible Bug?

I originally posted this on the main Sophos forums and was chastised and told to post it here. I was directed to do this by a forum moderator, so please do not criticise me for cross-posting.

I have noticed an odd situation. I am using the free Mac edition on Lion. Sophos keeps reporting infection in a couple of files in my Time Machine backup. But it does not report infection of the same files on the primary drive where the primary/original copies of those files reside. It simply doesn't make sense that the primary/original copy of a file could be free of infection and the backup copy made from that primary/original file could be infected. Rationally, one of these things is wrong: Rationally, either they are both infected or neither are infected. Not sure which is the case, but it certianly shakes myfaith in Sophos AntiVirus.

Update: Since my initial posting on the main forums, I've noticed one additional apparant anomoly in this matter. Amoung the multiple references to "Original Locations" for each infected file are some "Original Locations" which seem to make no sense. For example, a reported infected Windows .DLL file includes an identification of originally being a .WMA file, and a reported infected Windows .EXE  file includes an identification of originally being a .RM file. Ignoring the fact that these "original location" references are nonsensical, even if we were to accept for the moment that these file name/format transformations did somehow occur, there is still the fact that these referenced "original" files do not report as being infected. As I say, all this certianly shakes my faith in Sophos AntiVirus.

As I mention in the thread on the main forums, my posting was and is in reference to a possible bug and to (hopefully) bring the matter to the attention of the Sophos folks so that if it is a bug it can be addressed. This is not principly a request for support or assistance to solve/explain my dilema, although such will be gladly accepted.

:1008143


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Parents
  • Just to avoid misunderstandings - I'm neither Sophos nor speaking on behalf of Sophos.

    Nevertheless being responsible for support at our site I want to add some comments which might explain the situation a little bit. While we don't have products in this sense I know the problems in conjunction with supported/unsupported. On the one end there is supported and on the other definitely unsupported with a large best effort area in between (for example a web application on a non-standard platform/browser/configuration or a VPN client not on the supported list). Whenever you even only make it appear that you follow the same procedures as for the supported category word gets around quickly and you are flooded with requests and complaints and why-not-mes? It might seem harsh and unfriendly but my team is instructed to follow the arranged procedures - this includes neither labeling something as a "special case" and act on their own nor promising any further handling and volunteering escalation of the request.

    @LDMartin1959: You are correct about the paid vs. free - but I can't subscribe to your conclusions/impression. Most established vendors can live with a suggestion made that their product may not be perfect. For one thing past (perhaps erroneous, perhaps just unlucky) strategic decisions often can't be corrected immediately and you just have to face "imperfection" at least for some time. Another thing is that for corporate customers product selection is based on many factors, not just a single bug or feature. Think about - say - a digital semi-professional camera. Apart from the body you have a set of lenses you can use with different models of this vendor, you know how it works, you probably have special software and have spent quite some time to learn to work with the whole system. At one point you might have gripes because of a certain issue but you'd think more than twice before turning to another maker (well, it's not a perfect example as you can have more than one camera - if you can afford it:smileywink:). Furthermore wouldn't silently supporting a request be better suited to hide an issue than rejecting the query?

    There is a support channel (but not a one-to one) - this forum. You've probably read that several issues reported by users have been extensively dealt with (mostly though Andrew/Agile) but there were other exchanges (and outside of this forum too) as well. Returning to paying customers - guess they'd be miffed if the got the impression that non-paying customers receive the same level of support than them (and not all of them would buy the argument that overall it's also to their benefit). Don't forget that free users get in practice the same level of frequent updates (now including real-time lookups) as paying customers (and the required infrastructure is neither free for Sophos nor is it sponsored in any way) - so the offers (free vs. paid) have to be carefully balanced (this is true for any vendor).

    Don't know what detail you have submitted to Support - unfortunately not having Time Machine I couldn't help you at least by trying to recreate the problem - but from you initial post there's not much to works with other than asking: What was/were the detection(s)? And where? And - are you running v7 or v8 (please excuse if I have missed it)? I see you have already provided some additional details in your edit. A (possible) issue of incorrect paths has come up in this forum here.

    As I've already been (overly) lecturing I might as well add a word about the seriousness of the bug. Current AV's major function is on-access scanning (additionally backed by real-time threat information). While there is - as far as I can judge - definitely a bug which has to be corrected (you could restore an infected backup to a location which is exempted from on-access scanning) it seems not to affect the most important components and therefore doesn't call for all hands on deck.    

    Christian 

         

    :1008163
Reply
  • Just to avoid misunderstandings - I'm neither Sophos nor speaking on behalf of Sophos.

    Nevertheless being responsible for support at our site I want to add some comments which might explain the situation a little bit. While we don't have products in this sense I know the problems in conjunction with supported/unsupported. On the one end there is supported and on the other definitely unsupported with a large best effort area in between (for example a web application on a non-standard platform/browser/configuration or a VPN client not on the supported list). Whenever you even only make it appear that you follow the same procedures as for the supported category word gets around quickly and you are flooded with requests and complaints and why-not-mes? It might seem harsh and unfriendly but my team is instructed to follow the arranged procedures - this includes neither labeling something as a "special case" and act on their own nor promising any further handling and volunteering escalation of the request.

    @LDMartin1959: You are correct about the paid vs. free - but I can't subscribe to your conclusions/impression. Most established vendors can live with a suggestion made that their product may not be perfect. For one thing past (perhaps erroneous, perhaps just unlucky) strategic decisions often can't be corrected immediately and you just have to face "imperfection" at least for some time. Another thing is that for corporate customers product selection is based on many factors, not just a single bug or feature. Think about - say - a digital semi-professional camera. Apart from the body you have a set of lenses you can use with different models of this vendor, you know how it works, you probably have special software and have spent quite some time to learn to work with the whole system. At one point you might have gripes because of a certain issue but you'd think more than twice before turning to another maker (well, it's not a perfect example as you can have more than one camera - if you can afford it:smileywink:). Furthermore wouldn't silently supporting a request be better suited to hide an issue than rejecting the query?

    There is a support channel (but not a one-to one) - this forum. You've probably read that several issues reported by users have been extensively dealt with (mostly though Andrew/Agile) but there were other exchanges (and outside of this forum too) as well. Returning to paying customers - guess they'd be miffed if the got the impression that non-paying customers receive the same level of support than them (and not all of them would buy the argument that overall it's also to their benefit). Don't forget that free users get in practice the same level of frequent updates (now including real-time lookups) as paying customers (and the required infrastructure is neither free for Sophos nor is it sponsored in any way) - so the offers (free vs. paid) have to be carefully balanced (this is true for any vendor).

    Don't know what detail you have submitted to Support - unfortunately not having Time Machine I couldn't help you at least by trying to recreate the problem - but from you initial post there's not much to works with other than asking: What was/were the detection(s)? And where? And - are you running v7 or v8 (please excuse if I have missed it)? I see you have already provided some additional details in your edit. A (possible) issue of incorrect paths has come up in this forum here.

    As I've already been (overly) lecturing I might as well add a word about the seriousness of the bug. Current AV's major function is on-access scanning (additionally backed by real-time threat information). While there is - as far as I can judge - definitely a bug which has to be corrected (you could restore an infected backup to a location which is exempted from on-access scanning) it seems not to affect the most important components and therefore doesn't call for all hands on deck.    

    Christian 

         

    :1008163
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