In a relatively light cycle, Microsoft has issued three security bulletins to address four vulnerabilities. Two bulletins are for Windows and one is for Office. Redmond rated only one critical.
Joshua Talbot, security intelligence manager at Symantec Security Response, said
the lone critical issue this month -- the DVR-MS vulnerability -- will be somewhat trivial for attackers to exploit.
"It also allows attackers to skip a few of the traditional steps needed to get malicious code to execute on a targeted computer," Talbot said. "This is because when processing DVR-MS files, Windows Media Player and Media Center use in these files themselves to determine what code in memory gets executed. This allows an attacker to jump directly to executing malicious code."
Don't Take It Too Lightly
Paul Henry, forensic and security analyst at Lumension, warns IT admins not to be fooled by the light patch load. As he sees it, there's still more than enough work to go around. Despite issuing just three bulletins, the implications are serious. That's because all the patches aim at issues that allow remote code execution.
Henry said enterprises using the Remote Desktop Client, should make MS11-017 the top priority, followed by MS11-015 and finally MS11-016. Enterprises that are not using Remote Desktop Client but are regularly sending and receiving large media files should focus on MS11-015 first.
"Microsoft may have cleaned up a lot of loose ends with the release of Windows 7 and Windows Server 2008 R2 Service Pack 1 last month, leaving little to address this Patch Tuesday," Henry noted. "That being said, the patches released today did not address the recently disclosed MHTML issues and we expect a resolution in April's patch release."
Andrew Storms, director of Security at nCircle, welcomes what he calls a "lull" in security news from Microsoft, especially considering the steady flow of high profile vulnerabilities over the past few months.
Storms expects April to bring a shower of patches as part of Microsoft's seasonal high-low months. He also noted that the CanSec West's Pwn2own hacking contest, which is scheduled for later this week, traditionally unearths some interesting Internet Explorer and Windows 7 phone security bugs.
"Microsoft did not include a fix for the MHTML bug that they issued an advisory for in late January. While the March timeframe was probably doable for a release, it's likely that Microsoft hasn't seen much in the way of attacks for this vulnerability, so they felt comfortable keeping the patch on a normal release cycle. Users concerned about this bug can apply the FixIt mitigation tool Microsoft released last month."
Tyler Reguly, technical manager of security research at nCircle, found the contents of the bulletins this month "pretty boring." In fact, he said DLL Preloading is "such a snooze" that it's really not worth talking about anymore. But, he also issued a warning: "Everyone should probably take advantage of this light month of patching because the bulletin release pattern dictates that we'll all be very busy next month."