Re: Extended ASCII characters used for injection

Hi,

I don't know if it still works, but I remember, that (probably only
older versions and/or already fixed) MS IE ignores most significant
bit in the ASCII octet when interpreting the HTML content as US-ASCII.
Hence, it is/was possible to encode HTML metacharacters < and > (with
corresponding ordinal value 60 and 62) as 60+128 and 60+128. As I
mentioned, I am not sure if it still works, but at least it might be
of your interest.

Regards,

XtX.

On Tue, Oct 19, 2010 at 3:06 PM, Nibbler <[email protected]> wrote:
> Hi list,
>
> I have a web app and I want to block special characters in URL on the
> web server. Do you know if there is a risk of injection (XSS...) with
> extended ASCII char (%7f-%ff)?
> Is there any reason to block these characters?
>
> Thanks
> Regards,
> Nib
>
>
>
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