flaws in Vista

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MICROSOFT IS facing an early crisis of confidence in the quality of its Windows Vista operating system as computer security researchers and hackers have begun to find potentially serious flaws in the system that was released to corporate customers late last month. On December 15, a Russian programmer posted a description of a flaw that makes it possible to increase a user’s privileges on all of the company’s recent operating systems, including Vista. And over the weekend a Silicon Valley computer security firm said it had notified Microsoft that it had also found that flaw, as well as five other vulnerabilities, including one serious error in the software code underlying the company’s new Internet Explorer 7 browser. The browser flaw is particularly troubling because it potentially means that web users could become infected with malicious software simply by visiting a booby-trapped site. That would make it possible for an attacker to inject rogue software into the Vista-based computer, according to executives at Determina, a company based in California that sells software intended to protect against operating system and other vulnerabilities. Despite Microsoft assertions about the improved reliability of Vista, many in the industry are taking a wait-and-see approach. Microsoft’s previous operating system, Windows XP, required two “service packs” issued over a number of years to substantially improve security, and new flaws are still routinely discovered by outside researchers. On Friday, a Microsoft executive posted a comment on a company security information website stating the company was “closely monitoring” the vulnerability described by the Russian website. It permits the privileges of a standard user account in Vista and other versions of Windows to be increased, permitting control of all of the operations of the computer. In Unix and modern Windows systems, users are restricted in the functions they can perform, and complete power is restricted to certain administrative accounts. “Currently we have not observed any public exploitation or attack activity regarding this issue,” wrote Mike Reavey, operations manager of the Microsoft Security Response Center. “While I know this is a vulnerability that impacts Windows Vista, I still have every confidence that Windows Vista is our most secure platform to date.” On Saturday, Nicole Miller, a Microsoft spokeswoman, said the company was also investigating the reported browser flaw and that it was not aware of any attacks attempting to use the vulnerability . Microsoft is counting on Vista to help turn the tide against a wave of software attacks now plaguing Windows-based computers. Although Vista has been extensively tested, it is only now being exposed to the challenges of the open internet. Source : Hindustan Times