May 17, 2020

Microsoft fixes Critical remote code execution vulnerabilities

microsoft logo(LiveHacking.Com) – Microsoft has released 12 bulletins, five Critical and seven Important , to addressing 57 different vulnerabilities in Microsoft Windows, Office, Internet Explorer, Exchange and .NET Framework.

Among the fixes was a security update that resolves thirteen vulnerabilities in Internet Explorer. The most severe of these issues could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. As well as generally patching IE, the company also patched its implementation of the Vector Markup Language (VML) in its browser. If exploited the vulnerability could allow remote code execution if a user viewed a specially crafted webpage. Microsoft says that it is aware of this vulnerability being used as an information disclosure vulnerability in targeted attacks. It is therefore essential that this patch is applied as soon as possible.

There is also an update for Microsoft Windows Object Linking and Embedding (OLE) Automation. Again, the vulnerability could allow remote code execution, this time  if a user opens a specially crafted file. The fix corrects the way in which OLE Automation parses files. This security update is rated as Critical but only for Windows XP Service Pack 3. All other support versions of Microsoft Windows are not affected.

Similarly Microsoft fixed a vulnerability in how different types of media are decompressed. The remote code execution vulnerability could be exploited by tricking a user to open  a specially crafted media file (such as an .mpg file), open a Microsoft Office document (such as a .ppt file) that contains a maliciously crafted embedded media file, or if the user runs programs to receives streaming content designed to exploit the vulnerability.

There is also a fix for remote code execution vulnerabilities in Microsoft Exchange Server, the most severe of which could allow remote code execution in the security context of the transcoding service on the Exchange server if a user previews a specially crafted file using Outlook Web App (OWA). The transcoding service in Exchange that is used for WebReady Document Viewing.

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