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22 new security flaws discovered in Windows products

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October 13, 2004

Microsoft just published 10 new software security advisories, warning corporate administrators and Windows users of no less than 22 new security holes that affect the company's range of products. The advisories, and patches published with the bulletins, range from an "important" flaw affecting only Microsoft Windows NT Server to a collection of eight security holes, including three rated "critical".

Many of the security flaws leave Internet Explorer open to attack.

Microsoft's highest severity rating for software flaws is its "critical" ranking, while "important" is considered slightly less severe.

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One flaw, in Microsoft Excel, even affects Apple Computer's Mac OS X.

The abundance of flaws could leave corporate PCs vulnerable to attack if administrators are not able to patch quickly. A similar situation occurred in April, when Microsoft published seven advisories detailing 20 flaws. While one security hole stood out among those 20--and led to the widespread Sasser worm--there are no standouts in the current gaggle of goofs.

"Our challenge is trying to guess what the criminals are going to attack," said Stephen Toulouse, security program manager for Microsoft's security response team. "The guidance we are giving in general is to treat the critical ones first."

A single computer would not be vulnerable to all the flaws, Toulouse added.

Oliver Friedrichs, senior director of Symantec's security response center, said three vulnerabilities could lead to a Sasser-like worm, but the danger is lessened by the fact that the vulnerable services are not started by default on most versions of Windows.

These flaws are related to three network protocols that are not generally activated on Windows computers: Simple Mail Transfer Protocol (SMTP), Network News Transfer Protocol (NNTP), and Network Dynamic Data Exchange (NetDDE).

"Blaster and Sasser targeted core system vulnerabilities, where if you didn't have the patch you were vulnerable," Friedrichs said. "The key thing here is that these are not (generally) enabled by default.The question is how large is the deployment of vulnerable systems."

Microsoft rates the SMTP flaw critical only for Microsoft Exchange Server 2003. The NNTP flaw is rated critical for Microsoft Exchange 2000.

The other major class of flaws are those that affect applications on desktop computers, such as Internet Explorer and Excel. Threats to so-called client-side applications have been growing, Friedrichs said.

Of the current crop of vulnerabilities, 12 fall into that category. Of these, Microsoft rated five critical: three of the eight vulnerabilities in Internet Explorer, as well as two flaws in Excel.

Several of the flaws could be used to create Web content that would run a program from the Internet, if a victim could be lured to the malicious Web site.

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Symantec raised its overall Internet Threat Condition to 2 from 1, on account of the newly released vulnerabilities.

Microsoft has also re-released a patch from last month's graphics vulnerability, fixing a conflict with Windows XP Service Pack 2.

Source: C-Net News

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