I applied a rewrite rule as shown here
https://blog.paranoidpenguin.net/2018/12/how-to-remove-facebooks-fbclid-parameter-using-mod_rewrite-on-apache-2-4/

So now facebook links will work.

>> Wouldn't accepting parameters from others pose a security problem? I
>> tend to think it expands the attack surface.

On 2020-09-10 00:10, Cedric De Vroey wrote:
> No it doesn't really, as long as you use named parameters, and as long
> as you implement proper sanitation on those parameters you should be
> fine from a security perspective.

I agree if you mean just adding this one extra parameter.

I disagree if you mean allowing any extra parameters. Checking that the
parameter match our allowable list is part of a good defense in depth
strategy. By triggering this check, we know the person is an attacker,
and can use that information as part of our defense.


> However, there are privacy concerns
> that could be made over this practice since it could be used to track users.
> 

This looks like an attempt to bypass the EU cookie law.


-- 
Regards,

Ken Fallon
http://kenfallon.com
http://hackerpublicradio.org/correspondents.php?hostid=30

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