At an organisation if their Wifi is secured with WEP? why is this particularly bad for the organisation/business itself, I know WEP is a weak security algorithm which easily cracked but why is this specifically bad for the organisation? In other words how does this impact a business?
closed as unclear what you're asking by Xander, Rоry McCune, Eric G, dr jimbob, Adnan - Adi Apr 28 '14 at 16:47
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Why is there a WiFi at all ? That is the question.
When a WiFi access point uses WEP, it can be broken into, meaning that outsiders can also connect to the access point, and use it, and spy on the communications of other people using the same access point, and remotely disrupt it at will. Any business which is conducted over that access point can thus be impacted, if only for the availability.
Even if the said WiFi is there only as a convenience for visitors (as if it was, say, an "open WiFi" in some fast food restaurant), this can still be damaging to the public image of the organization. If the WiFi access point is merely used as free Internet access by the neighbourhood, then that's not a big worry -- unless one of the freeloaders uses it as starting point for an attack elsewhere.
Fast food restaurants and other open WiFi access points can get away with it because everybody understands that an "open WiFi" is really open and the provider cannot be held responsible for who connects to it. So what this means is that your organization, instead of using WEP, should make the access point simply completely open, so as to dispel all doubts on the total absence of security and responsibility for that access points.
Or, said otherwise: if you suggest switching from WEP protection to an open access points and some people scream and whine and oppose to it, then you will have identified who is using the WiFi for sensitive data -- and WEP is too pathetically weak to be entrusted with sensitive data.
I can give you two personally witnessed anecdotes:
Had an attacker discovered either of these before we had (and we don't have any way of knowing that they didn't other than we haven't discovered a credit card breach yet), the business impacts could have been disclosure of credit card information. In the second case the wifi actually was using WEP and in the first the attacker would have had the same access whether by guessing the weak password or cracking the WEP.
It is a common assumption that internal networks are secure from attackers and this leads many people to expose information that should not be exposed.