Microsoft fixed a critical hole in Windows Server as part of its April Patch Tuesday.
The software giant is addressing a critical flaw in Windows Internet Name Server (WINS) on Windows Server. The vulnerability affects Windows Server 2003, 2008 and 2008 R2 but does not impact client versions of Windows. Microsoft also fixed two important vulnerabilities in Microsoft Office. Security researchers identified two vulnerabilities in Microsoft PowerPoint that could allow for remote code execution using malicious PPT files. Microsoft issued the following information both bulletins:
MS11-035 (WINS or Windows Internet Name Server): This security update resolves a privately reported vulnerability in the Windows Internet Name Service (WINS). The vulnerability could allow remote code execution if a user received specially crafted malware on an affected system running the WINS service. By default, WINS is not installed on any affected operating system. Only customers who manually install this component are affected by this issue and will be offered the update.
MS11-036 (PowerPoint): This security update resolves two privately reported vulnerabilities in Microsoft PowerPoint. The vulnerabilities could allow remote code execution if a user opens a specially crafted malicious PowerPoint file. An attacker who successfully exploited either of these vulnerabilities could gain the same user rights as a logged-on user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Both bulletins are available through Windows Update or WSUS.