Top DNS Threats and How to Deal with Them

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DNS Hijacking

In DNS hijacking attacks, cyber criminals are able to subvert individuals' DNS requests, directing them to their own compromised DNS server. In such attacks, users may find themselves directed to a spoofed website. DNS hijacking can be used for phishing purposes such as directing users to a fake bank website in order to collect sensitive personal and financial information. Some ISPs use DNS hijacking to introduce ads or collect statistics on users.

To avoid DNS hijacking, change the default password on your router, which makes it difficult for attackers to hack your router using the default password. Additionally, you should always upgrade the firmware when updates are available.

The domain name system (DNS) is a critical component of the Internet, translating domain names such as into Internet protocol (IP) addresses. However, since most standard security measures do not block DNS traffic, cyber criminals are able to infiltrate networks and gain access to proprietary data. In addition to launching attacks, cyber criminals can also exploit an organization's DNS infrastructure to cause outages.

In a survey conducted by Vanson Bourne, 66 percent of U.S. respondents reported that their organization suffered a DNS attack within the last 12 months. Even more troubling, respondents indicated that the attack resulted in loss of Internet service (63 percent), an increase in customer complaints (42 percent) and the loss of confidential customer information (33 percent).

Over the past year, some of the world's most highly trafficked media and social networking sites have been disrupted by DNS attacks, with hackers seizing control of their websites by changing information in the organizations' DNS databases. Recently, both websites for Lenovo and Google were victims of "domain hijacking." During the attack, visitors to Google's Vietnamese site were redirected to another site. Visitors to Lenovo's site were maliciously redirected to a defaced site controlled by the well-known hacker group, Lizard Squad.

In this slideshow, Cloudmark CTO Neil Cook shares five of the top DNS threats, their potential impact on organizations, and best practices for identifying and preventing such attacks.


Related Topics : Unisys, Stimulus Package, Security Breaches, Symantec, Electronic Surveillance

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