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Microsoft confirms Windows NT security flaw
- — 12 March, 1999 21:49
Microsoft has acknowledged a security flaw in its Windows NT operating system that could allow a person to access protected files on a workstation or even deny users access to a Windows NT server.
The bug surfaces at an embarrassing time for the software maker. The company is scrambling to address privacy concerns raised earlier this week over a feature in its Windows 98 operating system that allows Microsoft to compile a hardware profile of users when they register their software.
The vulnerability in NT is exploited by running a malicious program when a system is in screensaver mode, a Microsoft product manager confirmed. The program can elevate the user's log-in status to that of an administrator, giving him or her access to protected files in the computer.
"We're developing a fix for the problem and we'll have the patch available by the end of the week," said Scott Culp, security product manager at Microsoft. The patch will be posted on the Web at http://www.microsoft.com/security, he said.
The flaw was discovered by an Indian software firm, Cybermedia Software, and affects all versions of Windows NT including two beta versions of Windows 2000 (formerly known as Windows NT 5.0). The problem will be fixed before Windows 2000 is released commercially, Microsoft's Culp said.
"This vulnerability requires that a person be able to log on to a system locally, that they can actually put their hands on the keyboard. It's not something you can exploit over the Internet," Culp said.
Exploiting the vulnerability on a workstation would give a user access to protected files on that machine, he said. Since most workstation users already have administrator status on their own machines, the issue is largely moot, he said.
On a Windows NT server, Culp acknowledged that the hack could allow a user to become a "domain administrator," empowering him or her to read protected files elsewhere on a network and to deny clients access to the server. However, standard security procedures at corporations prevent non-administrators from logging onto servers, Culp said.
"The primary vulnerabilities are in workstations and terminal servers," he said, adding that the hack takes a lot of skill and would constitute a "sophisticated technical attack".
Microsoft has an e-mail address set up where users can report suspected security issues -- which is how Cybermedia alerted Microsoft to the Windows NT problem, Culp said. "Microsoft takes security seriously; we know it's important to our customers," he said.
The incident is only the latest in a number of security issues that have dogged high-tech firms in recent weeks. Two days ago, Microsoft was forced to admit that a feature in Windows 98 assigns a unique identifier to documents created in Office 97, although the vendor insists the feature doesn't allow documents to be linked back to users.
The software giant also confirmed, as mentioned earlier, that the registration wizard in Windows 98 was feeding information back to Microsoft about customers' hardware set-ups -- without the consent of customers.
Microsoft has said it will develop software patches to resolve the issues and has posted a letter of explanation for users on its Web site at http://www.microsoft.com/.
Meanwhile, Intel continues to be dogged by its plans to embed a unique serial number into each of its Pentium III processors, a move designed to further electronic commerce by making it easier to identify parties in a transaction, according to the chip company. Some consumer protection groups said the Intel serial number could allow nefarious Web users to track the movements of users on the Internet.