Vulnerabilities

An elevation of privilege vulnerability exists in the way that the StartTileData.dll handles file creation in protected locations. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.<br /> To exploit the vulnerability, a locally authenticated attacker could run a specially crafted application.<br /> The security update addresses the vulnerability by ensuring the StartTileData.dll properly handles this type of function.<br />

An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys. An attacker who successfully exploited the vulnerability could gain elevated privileges on a targeted system.<br /> To exploit the vulnerability, an attacker would have to log on to an affected system and run a specially crafted script or application.<br /> The update addresses the vulnerability by correcting how Windows handles calls to Win32k.<br />

A remote code execution vulnerability exists in Microsoft Word software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user.<br /> To exploit the vulnerability, a user must open a specially crafted file with an affected version of Microsoft Word software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file.<br /> The security update addresses the vulnerability by correcting how Microsoft Word handles files in memory.<br />

An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the user’s computer or data.<br /> To exploit the vulnerability, an attacker could craft a special document file and then convince the user to open it. An attacker must know the memory address location where the object was created.<br /> The update addresses the vulnerability by changing the way certain Excel functions handle objects in memory.<br />

A spoofing vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server.<br /> The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim&amp;#39;s identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user.<br /> The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.<br />

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. 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.<br /> Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Excel. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) containing a specially crafted file designed to exploit the vulnerability. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file.<br /> The security update addresses the vulnerability by correcting how Microsoft Excel handles objects in memory.<br />

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user.<br /> If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.<br /> The security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.<br />

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user.<br /> If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.<br /> The security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.<br />

A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries. An attacker who successfully exploited this vulnerability could cause the DNS service to become nonresponsive.<br /> To exploit the vulnerability, an authenticated attacker could send malicious DNS queries to a target, resulting in a denial of service.<br /> The update addresses the vulnerability by correcting how Windows DNS processes queries.<br />

An information disclosure vulnerability exists when the Microsoft Windows Graphics Component improperly handles objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system.<br /> To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application.<br /> The update addresses the vulnerability by correcting the way in which the Windows Graphics Component handles objects in memory.<br />

A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system.<br /> An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file.<br /> The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory.<br />

A security feature bypass vulnerability exists in SQL Server Reporting Services (SSRS) when the server improperly validates attachments uploaded to reports. An attacker who successfully exploited this vulnerability could upload file types that were disallowed by an administrator.<br /> To exploit the vulnerability, an authenticated attacker would need to send a specially crafted request to an affected SSRS server.<br /> The update addresses the vulnerability by modifying how SSRS validates attachment uploads.<br />