Security Only Update for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB4556403)

2020-05-11T21:25:59
ID KB4556403
Type mskb
Reporter Microsoft
Modified 2020-05-12T17:00:18

Description

<html><body><p>Security Only Update for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB4556403)</p><h2></h2><div class="alert-band"> <div class="alert alert-info" role="alert"> <p class="alert-title">Applies to:</p> <div class="row"> <div class="col-xs-24"> <p>Microsoft .NET Framework 3.5.1 Microsoft .NET Framework 4.5.2 Microsoft .NET Framework 4.6 Microsoft .NET Framework 4.6.1 Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2 Microsoft .NET Framework 4.8 </p> </div> </div> </div> </div><h2></h2><div class="alert-band"> <div class="alert alert-info" role="alert"> <p align="LEFT" dir="LTR"> <strong>IMPORTANT</strong> Verify that you have installed the required updates listed in the <strong>How to get this update</strong> section before installing this update.  </p> </div> </div><div class="alert-band"> <div class="alert alert-info" role="alert"> <p align="LEFT" dir="LTR"> <strong>IMPORTANT </strong>Some customers who use Windows Server 2008 R2 SP1 and have activated their ESU multiple activation key (MAK) add-on before installing the January 14, 2020 updates might need to re-activate their key. Re-activation on the affected devices should only be required once.  For information on activation, see this <a href="https://aka.ms/Windows7ESU/t_blank"><u>blog</u></a> post. </p> </div> </div><div class="alert-band"> <div class="alert alert-info" role="alert"> <p align="LEFT" dir="LTR"> <strong>IMPORTANT</strong> WSUS scan cab files will continue to be available for Windows 7 SP1 and Windows Server 2008 R2 SP1. If you have a subset of devices running these operating systems without ESU, they might show as non-compliant in your patch management and compliance toolsets. </p> </div> </div><div class="alert-band"> <div class="alert alert-info" role="alert"> <p align="LEFT" dir="LTR"> <strong>IMPORTANT</strong> Customers who have purchased the <a href="https://www.microsoft.com/en-us/cloud-platform/extended-security-updates"><u>Extended Security Update (ESU)</u></a> for on-premises versions of these operating systems must follow the procedures in <a href="https://support.microsoft.com/en-us/help/4522133/procedure-to-continue-receiving-security-updates"><u>KB4522133</u></a> to continue receiving security updates after extended support ends on January 14, 2020. For more information on ESU and which editions are supported, see <a href="https://support.microsoft.com/en-us/help/4497181/lifecycle-faq-extended-security-updates"><u>KB4497181</u></a>. </p> </div> </div><div class="alert-band"> <div class="alert alert-info" role="alert"> <p align="LEFT" dir="LTR"> <strong>IMPORTANT</strong> Starting on January 15, 2020, a full-screen notification will appear that describes the risk of continuing to use Windows 7 Service Pack 1 after it reaches end of support on January 14, 2020. The notification will remain on the screen until you interact with it. This notification will only appear on the following editions of Windows 7 Service Pack 1: </p> <ul> <li>Starter.</li> <li>Home Basic.</li> <li>Home Premium.</li> <li> Professional. If you have purchased the Extended Security Update (ESU), the notification will not appear. For more information, see <a href="https://techcommunity.microsoft.com/t5/windows-it-pro-blog/archived-how-to-get-extended-security-updates-for-eligible/ba-p/917807"><u>How to get Extended Security Updates for eligible Windows devices</u></a> and <a href="https://support.microsoft.com/en-us/help/4497181/lifecycle-faq-extended-security-updates"><u>Lifecycle FAQ-Extended Security Updates</u></a>. </li> <li>Ultimate. </li> </ul> <p align="LEFT" dir="LTR"> <strong>Note </strong>The notification will not appear on domain-joined machines or machines in kiosk mode. </p> </div> </div><div class="alert-band"> <div class="alert alert-info" role="alert"> <p align="LEFT" dir="LTR"> <strong>IMPORTANT</strong> Starting in August, 2019, updates to .NET Framework 4.6 and above, for Windows Server 2008 R2 SP1, and Windows 7SP1, require SHA-2 Code signing support. Please make sure that you have all the latest Windows Updates before applying this update to avoid installation issues. For more detailed information about SHA-2 code signing support updates, please see <span><span><a href="https://support.microsoft.com/en-us/help/4474419/sha-2-code-signing-support-update">KB 4474419</a>. </span></span></p> </div> </div><div class="alert-band"> <div class="alert alert-info" role="alert"> <p align="LEFT" dir="LTR"> <strong>IMPORTANT</strong> All updates for .NET Framework 4.7.2, 4.7.1, 4.7, 4.6.2, 4.6.1, and 4.6 require that the d3dcompiler_47.dll update is installed. We recommend that you install the included d3dcompiler_47.dll update before you apply this update. For more information about the d3dcompiler_47.dll, see <a href="https://support.microsoft.com/en-us/help/4019990">KB 4019990</a>. </p> </div> </div><div class="alert-band"> <div class="alert alert-info" role="alert"> <p align="LEFT" dir="LTR"> <strong>IMPORTANT</strong> If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see <a bookmark-id="" data-content-id="" data-content-type="" href="https://technet.microsoft.com/en-us/library/hh825699" managed-link="" target="_blank">Add language packs to Windows</a>. </p> </div> </div><h2>Summary</h2><p> An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level. To exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program. The update addresses the vulnerability by correcting how .NET Framework activates COM objects. </p><p> To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE). </p><ul><li><a href="https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066" id="kb-link-2" target="_self">CVE-2020-1066</a></li></ul><p> A remote code execution vulnerability exists in .NET Framework software when the software fails to check the source markup of a file. 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. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of .NET Framework. 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. The security update addresses the vulnerability by correcting how .NET Framework checks the source markup of a file. </p><p> To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE). </p><ul><li><a href="https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0605" id="kb-link-2" target="_self">CVE-2020-0605</a></li></ul><p> A denial of service vulnerability exists when .NET Framework improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET Framework web application. The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the .NET Framework application. The update addresses the vulnerability by correcting how the .NET Framework web application handles web requests. </p><p> To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE). </p><ul><li><a href="https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1108" id="kb-link-2" target="_self">CVE-2020-1108</a></li></ul><h2>Additional information about this update</h2><div> <span>The following articles contain additional information about this update as it relates to individual product versions.</span> </div><div></div><ul> <li> <span> <a href="https://support.microsoft.com/help/4552965" managed-link="">4552965</a> <span>Description of the Security Only Update for .NET Framework 3.5.1 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB4552965)</span> </span> </li> <li> <span> <a href="https://support.microsoft.com/help/4552952" managed-link="">4552952</a> <span>Description of the Security Only Update for .NET Framework 4.5.2 for Windows 7 SP1 and Windows Server 2008 R2 SP1 and Windows Server 2008 SP2 (KB4552952)</span> </span> </li> <li> <span> <a href="https://support.microsoft.com/help/4552951" managed-link="">4552951</a> <span>Description of the Security Only Update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 7 SP1 and Windows Server 2008 R2 SP1 and Windows Server 2008 SP2 (KB4552951)</span> </span> </li> <li> <span> <a href="https://support.microsoft.com/help/4552953" managed-link="">4552953</a> <span>Description of the Security Only Update for .NET Framework 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB4552953)</span> </span> </li> </ul><h2>Information about protection and security</h2><ul> <li> Protect yourself online: <a href="https://support.microsoft.com/hub/4099151/windows-security-help" originalsrc="https://support.microsoft.com/hub/4099151/windows-security-help" shash="RYy3LeXx+rmimVtQWgsOp2FdFIqw7JA//Q/gQk82okgjOsd4xXdoK0JeBzlEcm0ODcghLacwCQ7rq/te5MIy9rhRyjOI5z+tQLQ58N0ohXStVASL9xwW0nm7tWELhl8Vd+jYkRf314nXnEXaofpGgPwiR8IWSM1V+w57ooqQzME=" target="_blank">Windows Security support</a></li> <li> Learn how we guard against cyber threats: <a href="https://www.microsoft.com/security" originalsrc="https://www.microsoft.com/security" shash="Fb+Q8jcsMznGoXBaEpy7ItSNVM/ojkQHBsLDm3A6U1j8nU/EzgwX89Ox/pQeEuCbTUAIMz1KtFkOsv9oQSp0WSip1uNUHotfXevDx7dDk5kFn4u/io4q1ESXpDplQ989sCEmxdzRlhaLF3PHKXMoLlTmwS5dmeU5gGxfXDhL40w=">Microsoft Security</a></li> </ul></body></html>