According to the Internet Monitoring firm BGPmon, have says on twitter that Google Free DNS 8.8.8.8/32 was hijacked for 22 mins, which affects the networks in Brazil & Venezuela.
Google's DNS server serves the queries of 150 billion users a day. Now you can imagine that within 22 minutes how many users have been got effected. Approx million of users had been affected by this hijack which includes Government service, Education institution and Financial institution also. About tonnes of internet users also use Google Open DNS for speeding their internet. All these affected users were redirected to Brazil & Venezuela.
As per the THN, which explains that hackers have exploited the vulnerability called Border Gateway Protocol (BGP) which is used to exchange data between large service providers, and hijacking could allow the attackers to simply re-route the traffic to a router they controlled. BGP attack is a Middle-Man-Attack, which is hard to detect. Earlier two security researchers - Tony Kapela and Alex Pilosov have demonstrated the attack in 2008. Get free ebook about BGP attack.