Microsoft Patches 115 Vulnerabilities, 19 Critical, 3 Zero-Days

Microsoft Security Patch Day
Microsoft Security Patch Day

Microsoft Security released Tuesday Patch April 2020.

Microsoft patches 115 security vulnerabilities, whereas 19 are critical. They also patch Zero-days vulnerabilities in this update.

Following Important and Critical CVE’s have disclosed.

 

CVE-2020-0760 | Microsoft Office Remote Code Execution Vulnerability

A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. 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.
To exploit the vulnerability, an attacker must first convince a user to open a specially crafted Office document.
The updates address the vulnerability by correcting how Office handles type libraries.

CVE-2020-0906 | Microsoft Excel Remote Code Execution Vulnerability

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. 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.
The security update addresses the vulnerability by correcting how Microsoft Excel handles objects in memory.

CVE-2020-0835 | Windows Defender Antimalware Platform Hard Link Elevation of Privilege Vulnerability

An elevation of privilege vulnerability exists when Windows Defender antimalware platform improperly handles hard links. An attacker who successfully exploited this vulnerability could overwrite a targeted file leading to an elevated status.
To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.
The security update addresses the vulnerability by correcting how Windows Defender antimalware platform handles hard links.

CVE-2020-0929, CVE-2020-0931, CVE-2020-0932

These CVE’s are remote code execution vulnerabilities in Microsoft SharePoint. To exploit these vulnerabilities, an attacker needs to upload a specially crafted SharePoint package to an affected version of SharePoint, allowing them to execute arbitrary code in the SharePoint application pool and the SharePoint server.

CVE-2020-0970 | Scripting Engine Memory Corruption Vulnerability

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.
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.
The security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.

CVE-2020-0969 | Chakra Scripting Engine Memory Corruption Vulnerability

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge (HTML-based). 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. 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.

In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge (HTML-based) and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability.

Zero-Days Vulnerability Patch

CVE-2020-1027 | Windows Kernel Elevation of Privilege Vulnerability
An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.

To exploit the vulnerability, a locally authenticated attacker could run a specially crafted application. The security update addresses the vulnerability by ensuring the Windows Kernel properly handles objects in memory.

CVE-2020-0968 | Scripting Engine Memory Corruption Vulnerability

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. 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. 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.

In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website. An attacker could also embed an ActiveX control marked “safe for initialization” in an application or Microsoft Office document that hosts the IE rendering engine. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability.
The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

The April 2020 security release consists of security updates for the following software:

  • Microsoft Windows
  • Microsoft Edge (EdgeHTML-based)
  • Microsoft Edge (Chromium-based)
  • ChakraCore
  • Internet Explorer
  • Microsoft Office and Microsoft Office Services and Web Apps
  • Windows Defender
  • Visual Studio
  • Microsoft Dynamics
  • Microsoft Apps for Android
  • Microsoft Apps for Mac

How To Update Microsoft Windows?

  • Open the Control Panel.
  • If you are using Small icons view, click on the Windows Update option.
  • If you are using the Category view, click on the System and Security option, then click on the Windows Update option.
  • Windows Update will check for any available updates for your computer.
  • Turn to automatic updates for future.
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