http://www.darkreading.com/security/vulnerabilities/showArticle.jhtml?articleID=212001592 By Tim Wilson DarkReading Nov 10, 2008 More than six months after the discovery of security flaws in the Internet's core addressing system, many Domain Name System (DNS) servers are still open to attack, according to a study published today. According to a report on DNS trends published by Infoblox and the Measurement Factory, approximately one in four DNS servers still does not perform source port randomization, the chief patch for the so-called "Kaminsky vulnerability" that was discovered by researcher Dan Kaminsky in the first half of last year and fully disclosed at the Black Hat conference in August. "A surprising number have not been upgraded and are very vulnerable to cache poisoning," the report states. The study, which took a sample of 5 percent of the Internet's IPv4 address space -- about 80 million addresses -- also showed that more than 40 percent of Internet name servers allow recursive queries, which is one of the design flaws that might enable attackers to abuse Internet address spaces for their own purposes. About 30 percent allow zone transfers to arbitrary requestors, another flaw that could lead to vulnerabilities such as those discovered by Kaminsky. [...] ______________________________________________ Visit the InfoSec News Security Bookstore Best Selling Security Books and More! http://www.shopinfosecnews.orgReceived on Tue Nov 11 2008 - 02:01:29 PST
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