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Four of the top 100 brands have insecure domain names
Some of the world’s most famous global brands have domain names that are still vulnerable to the Kaminsky exploit and could be hijacked by others.
Earlier today, I ran all of the brands on Deloitte’s list of the top 100 brands through a vulnerability testing tool provided by IANA.
The results show that four of these brands – all household names – have domains classed as “highly vulnerable” to the Kaminsky exploit.
If the IANA test is reliable, this means that false data could be injected into their name servers, potentially redirecting users to a web site belonging to the attacker.
Another eight brands had domains that the IANA tool reported might be “vulnerable” to attacks, but which had measures in place to mitigate the risk.
The Kaminsky bug has been public for almost two years. It’s a cache poisoning attack in which a recursive name server is tricked into providing false data about a domain.
It becomes particularly scary when a domain’s authoritative name servers also have their recursive functions turned on. A successful attack could redirect all traffic to a compromised domain to a server managed by the attacker.
The surest way to avoid vulnerability is to turn off recursion. IANA says: “Authoritative name servers should never be configured to provide recursive name service.”
Alternatively, a method known as source port randomization can make the risk of being compromised by the Kaminsky exploit so small it’s barely a threat at all.
The IANA tool reports that four of the top 100 brands have at least one “highly vulnerable” authoritative name server that has recursion enabled and no source port randomization.
The other eight “vulnerable” domains were identified as running on at least one authoritative server that had recursion turned on and source port randomization enabled.
I’m not an expert, but I don’t believe this second category of companies has a great deal to worry about in terms of Kaminsky.
I picked the Deloitte brand list for this experiment because it is the list of brands Deloitte believes require the most trademark protection under ICANN’s new TLD process.
.CO Internet is already using the list during its sunrise period for the .co domain.
Michele Neylon of Blacknight has found some more vulnerable servers over here.
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[…] Four of the top 100 brands have insecure domain names […]
[…] Four of the top 100 brands have insecure domain names […]