Dangerous html tag?

Julian Field mailscanner at ecs.soton.ac.uk
Thu Mar 18 13:57:27 GMT 2004

At 12:33 18/03/2004, you wrote:
>Remco Barendse wrote:
>>I haven't got a clue whether Object Tags are ever used for something
>>Could you make the Object Codebase look at the allowed / disallowed
>>extension list? Any file we do not allow as an attachment form should be
>>utterly destroyed when in Object Codebase?
>>This would allow mails with images and other stuff we may allow but not
>>objectionable content.
>>Just an idea :)
>>On Thu, 18 Mar 2004, Julian Field wrote:
>Julian is it feasible to consider a list of tags that are
>disarmed/banned/allowed ? So in the future we could just add the tag to
>an existing list and it will be destroyed? Or something like this
>similarly modular to save upgrading MS for this same thing (catching
>tags) in the future?

Certainly feasible. I will take a look, and agree it would be a good idea.
How would we handle the yes/no/disarm values for each one?
The yes/no is easy, just block it if it's in the list. But the disarm option?
And what about being able to use a ruleset? The ruleset would have to apply
to the whole configuration option, not just the separate bits of it.
And what about the report message included whenever one or more of these
tags are found?

Allow HTML tags = iframe=yes form=disarm object/codebase=no object/data=no

So "yes" would be the same as not listing the tag at all, the other
possibilities would be "no" and "disarm". Complex tags like <Object
Codebase=...> would be separated with a "/".

That looks ugly. Can someone come up with something better?
Julian Field
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