Multiple serious vulnerabilities have been found in Microsoft Windows. Malicious users can exploit these vulnerabilities to gain privileges, obtain sensitive information, cause a denial of service or execute arbitrary code.

Below is a complete list of vulnerabilities:

1. An improper validation of input before loading DLL (dynamic link library) files can be exploited remotely by convincing a user to open a specially designed Office document to execute arbitrary code;
2. An incorrect enforcement of privilege levels in Windows Hyper-V instruction emulation can be exploited remotely to gain privileges on a target guest operating system;
3. An improper validation of buffer length done by tdx.sys can be exploited remotely via a specially designed application to gain privileges;
4. An incorrect handling of cabinet files can be exploited remotely via a specially designed cabinet file to execute arbitrary code;
5. Multiple vulnerabilities related to an improper handling of objects in memory in Windows Uniscribe can be exploited remotely by convincing a user to visit an untrusted webpage or open a specially designed document to obtain sensitive information;
6. Multiple vulnerabilities related to an improper initialization of objects in memory in Windows kernel can be exploited via a specially designed application to obtain sensitive information;
7. An incorrect handling of files in memory in Microsoft office can be exploited remotely either by sending a specially designed file and convincing a user to open the file or by hosting a website with a malicious content to execute arbitrary code;
8. An improper handling of LNK files in the Windows Explorer can be exploited remotely in case an icon of a specially designed shortcut is displayed to execute arbitrary code;
9. An incorrect handling of objects in memory in Windows kernel-mode driver can be exploited locally via a specially designed application to gain privileges;
10. An improper parsing of PDF files in Microsoft Windows can be exploited remotely by convincing a user to open a specially designed PDF file to obtain sensitive information;
11. An incorrect sanitizing of content in Skype for Business and Lync Servers can be exploited remotely by inviting a user to an instant message session and sending a message which contains a specially designed JavaScript content to obtain sensitive information.

Technical details

In case of vulnerability (4), malicious user can convince a user to open a specially designed cabinet file or spoof a network printer and convince a user to open a specially designed cabinet file which looks like a printer driver.

Microsoft Office Word Viewer

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

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