Microsoft will deliver 13 security updates on Tuesday to patch more than two dozen vulnerabilities in Windows and Office.
Five of the updates are tagged "critical," the highest threat ranking in its four-step scoring system. The 13 updates will equal the record from October 2009, when Microsoft issued the same number of bulletins, but fixed a total of 34 vulnerabilities . According to Jerry Bryant, a senior manager with the Microsoft Security Response Center (MSRC), next week's updates will patch 26 flaws.
"A lot? That's an understatement," said Andrew Storms, director of security operations at nCircle Network Security. "But we could have had 14," he added, referring to the emergency Internet Explorer (IE) update Microsoft released two weeks ago. That "out-of-band" update was originally set to be included in the collection set to ship this month.
Of the eight updates not marked critical, seven were ranked "important," the next-lower rating, while one was pegged "moderate." Eleven of the 13 will affect one or more editions of Windows; the remaining pair will affect Office XP and Office 2003 on Windows, and Office 2004 for Mac.
"What's interesting this month is that there are fewer applications updates," said Storms, talking about the 11-to-2 ratio of Windows-to-Office security bulletins. The trend, Storms noted, has been the opposite: Microsoft applications, primarily Office and IE, have been extensively exploited by hackers, who have shied away from Windows itself because attacking applications has been easier.
That's not to say there isn't evidence of long-standing trends in the massive matrix that Microsoft spelled out in today's advance notification . One trend: Newer software is generally more secure than older software.
"We know that the newer operating systems are more secure," said Storms. "They use newer code, and were created with SDL [Security Development Lifecycle]," he added. SDL is Microsoft's term for a programming philosophy that bakes security awareness into all aspects of development. As proof, Storms pointed to Windows Server 2008 R2, the newest version of Microsoft's server software. "It has the least number of bulletins," he said.
Server 2008 R2 will be affected by 5 of the 11 Windows updates. Windows 7 , the newest client operating system, will be impacted by the same percentage, 45%, of the total. The eight-year-old Windows XP, meanwhile, will require 8 of the 11, or 73% of Windows updates, while the even older Windows 2000 will be affected by 9 of the 11, or 82% of the total.
"Every month, there's a new reason to get off the older operating systems, to get off the older applications," said Storms.
Storms was hesitant to delve deeply into the affected software matrix Microsoft published as part of its heads-up. But the update Microsoft tapped as "Bulletin 1" caught his eye, nonetheless. That update ran counter to the norm, for it was rated critical for Windows XP, important for Vista, then back to critical for Windows 7. Because Vista and Windows 7 share a code base, vulnerabilities that affect them are almost always ranked identically.
"Maybe it's something to do with User Account Control," Storms guessed. User Account Control (UAC), is the term for the prompts users see in Windows Vista and Windows 7 that require approval for tasks that may have security implications, such as installing new software. "The more-in-your-face UAC version in Vista might be more annoying, but it might provide some mitigation that UAC doesn't in Windows 7 for this vulnerability," Storms argued.
Bryant, of the MSRC, confirmed that Microsoft will close only one of the three outstanding security advisories. Microsoft will patch the 17-year-old bug in the kernel of all 32-bit versions of Windows. The vulnerability in the Windows Virtual DOS Machine (VDM) subsystem, a component that runs DOS and 16-bit Windows software, was publicly disclosed Jan. 19 by Google engineer Tavis Ormandy on the Full Disclosure security mailing list.
Two other advisories, including the one involving IE that Microsoft issued just yesterday , will not be patched next week, Bryant said.
"The good thing this month is that there are no mission-critical applications affected, like SQL Server and Exchange," said Storms, looking for a silver lining in the massive update. And he urged IT administrators to do what they could to prepare for next Tuesday. "I'll be asking my team, 'What are we behind on that we can spend the next few days catching up?' and then look at next week's [current] schedule and ask, 'What can we delay?'"