Microsoft April 2020 Patch Tuesday fixes 3 zero-days, 15 critical flaws

Microsoft April 2020 Patch Tuesday fixes 3 zero-days, 15 critical flaws

Patch Tuesday

Today is Microsoft’s April 2020 Patch Tuesday, and with everything going on, it is going to be particularly stressful for Windows administrators, so be especially nice to them today.

With the release of the April 2020 security updates, Microsoft has released fixes for 113 vulnerabilities in Microsoft products. Of these vulnerabilities, 15 are classified as Critical, 93 as Important, 3 as Moderate, and 2 as Low.

Of particular interest, Microsoft patched three zero-day vulnerabilities, with two of them being seen actively exploited in attacks.

Users should install these security updates as soon as possible to protect Windows from known security risks.

For information about the non-security Windows updates, you can read about today’s Windows 10 KB4549951 & KB4549949 cumulative updates.

Zero-day vulnerabilities fixed in April 2020

Microsoft has stated that two zero-day vulnerabilities have been publicly disclosed and two have been known to be exploited in the wild.

The publicly released vulnerabilities are:

  • CVE-2020-0935 – OneDrive for Windows Elevation of Privilege Vulnerability
  • CVE-2020-1020 – Adobe Font Manager Library Remote Code Execution Vulnerability

The publicly exploited vulnerabilities are:

  • CVE-2020-0938 – Adobe Font Manager Library Remote Code Execution Vulnerability
  • CVE-2020-1020 – Adobe Font Manager Library Remote Code Execution Vulnerability

Patch released for Adobe Font Manager zero-day vulnerabilities

The two zero-day remote code execution vulnerabilities in the Windows Adobe Font Manager Library were previously announced by Microsoft as they were seen being exploited in limited attacks.

These vulnerabilities are known as the CVE-2020-0938 and CVE-2020-1020 “Adobe Font Manager Library Remote Code Execution Vulnerability” and has the following description:

A remote code execution vulnerability exists in Microsoft Windows when the Windows Adobe Type Manager Library improperly handles a specially-crafted multi-master font – Adobe Type 1 PostScript format.

For all systems except Windows 10, an attacker who successfully exploited the vulnerability could execute code remotely. For systems running Windows 10, an attacker who successfully exploited the vulnerability could execute code in an AppContainer sandbox context with limited privileges and capabilities. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

There are multiple ways an attacker could exploit the vulnerability, such as convincing a user to open a specially crafted document or viewing it in the Windows Preview pane.

Previously, various workarounds were released, such as disabling preview panes, various services, and registry modifications to reduce the security risks or block attacks.

With this security update installed, these workarounds are no longer necessary, and users who have applied them should undo them as they are no longer needed.

The April 2020 Patch Tuesday Security Updates

Below is the full list of resolved vulnerabilities and released advisories in the April 2020 Patch Tuesday updates.

Tag CVE ID CVE Title Severity
Android App CVE-2020-0943 Microsoft YourPhone Application for Android Authentication Bypass Vulnerability Important
Apps CVE-2020-1019 Microsoft RMS Sharing App for Mac Elevation of Privilege Vulnerability Important
Microsoft Dynamics CVE-2020-1050 Microsoft Dynamics 365 (On-Premise) Cross Site Scripting Vulnerability Important
Microsoft Dynamics CVE-2020-1018 Microsoft Dynamics Business Central/NAV Information Disclosure Important
Microsoft Dynamics CVE-2020-1049 Microsoft Dynamics 365 (On-Premise) Cross Site Scripting Vulnerability Important
Microsoft Dynamics CVE-2020-1022 Dynamics Business Central Remote Code Execution Vulnerability Critical
Microsoft Graphics Component CVE-2020-0952 Windows GDI Information Disclosure Vulnerability Important
Microsoft Graphics Component CVE-2020-0938 Adobe Font Manager Library Remote Code Execution Vulnerability Important
Microsoft Graphics Component CVE-2020-0687 Microsoft Graphics Remote Code Execution Vulnerability Critical
Microsoft Graphics Component CVE-2020-0987 Microsoft Graphics Component Information Disclosure Vulnerability Important
Microsoft Graphics Component CVE-2020-1004 Windows Graphics Component Elevation of Privilege Vulnerability Important
Microsoft Graphics Component CVE-2020-1005 Microsoft Graphics Component Information Disclosure Vulnerability Important
Microsoft Graphics Component CVE-2020-0958 Win32k Elevation of Privilege Vulnerability Important
Microsoft Graphics Component CVE-2020-0907 Microsoft Graphics Components Remote Code Execution Vulnerability Critical
Microsoft Graphics Component CVE-2020-0982 Microsoft Graphics Component Information Disclosure Vulnerability Important
Microsoft Graphics Component CVE-2020-0964 GDI+ Remote Code Execution Vulnerability Important
Microsoft Graphics Component CVE-2020-1020 Adobe Font Manager Library Remote Code Execution Vulnerability Important
Microsoft Graphics Component CVE-2020-0784 DirectX Elevation of Privilege Vulnerability Important
Microsoft JET Database Engine CVE-2020-0995 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-0999 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-0988 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-0992 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-0994 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-0953 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-0889 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-0959 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-0960 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft JET Database Engine CVE-2020-1008 Jet Database Engine Remote Code Execution Vulnerability Important
Microsoft Office CVE-2020-0979 Microsoft Excel Remote Code Execution Vulnerability Important
Microsoft Office CVE-2020-0980 Microsoft Word Remote Code Execution Vulnerability Important
Microsoft Office CVE-2020-0984 Microsoft (MAU) Office Elevation of Privilege Vulnerability Important
Microsoft Office CVE-2020-0760 Microsoft Office Remote Code Execution Vulnerability Important
Microsoft Office CVE-2020-0991 Microsoft Office Remote Code Execution Vulnerability Important
Microsoft Office CVE-2020-0961 Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability Important
Microsoft Office CVE-2020-0931 Microsoft SharePoint Remote Code Execution Vulnerability Critical
Microsoft Office CVE-2020-0906 Microsoft Excel Remote Code Execution Vulnerability Important
Microsoft Office CVE-2020-0935 OneDrive for Windows Elevation of Privilege Vulnerability Important
Microsoft Office SharePoint CVE-2020-0927 Microsoft Office SharePoint XSS Vulnerability Critical
Microsoft Office SharePoint CVE-2020-0923 Microsoft Office SharePoint XSS Vulnerability Important
Microsoft Office SharePoint CVE-2020-0925 Microsoft Office SharePoint XSS Vulnerability Important
Microsoft Office SharePoint CVE-2020-0924 Microsoft Office SharePoint XSS Vulnerability Important
Microsoft Office SharePoint CVE-2020-0932 Microsoft SharePoint Remote Code Execution Vulnerability Critical
Microsoft Office SharePoint CVE-2020-0930 Microsoft Office SharePoint XSS Vulnerability Important
Microsoft Office SharePoint CVE-2020-0933 Microsoft Office SharePoint XSS Vulnerability Important
Microsoft Office SharePoint CVE-2020-0920 Microsoft SharePoint Remote Code Execution Vulnerability Important
Microsoft Office SharePoint CVE-2020-0929 Microsoft SharePoint Remote Code Execution Vulnerability Critical
Microsoft Office SharePoint CVE-2020-0971 Microsoft SharePoint Remote Code Execution Vulnerability Important
Microsoft Office SharePoint CVE-2020-0975 Microsoft SharePoint Spoofing Vulnerability Important
Microsoft Office SharePoint CVE-2020-0978 Microsoft Office SharePoint XSS Vulnerability Important
Microsoft Office SharePoint CVE-2020-0977 Microsoft SharePoint Spoofing Vulnerability Important
Microsoft Office SharePoint CVE-2020-0976 Microsoft SharePoint Spoofing Vulnerability Important
Microsoft Office SharePoint CVE-2020-0974 Microsoft SharePoint Remote Code Execution Vulnerability Critical
Microsoft Office SharePoint CVE-2020-0973 Microsoft Office SharePoint XSS Vulnerability Important
Microsoft Office SharePoint CVE-2020-0972 Microsoft SharePoint Spoofing Vulnerability Important
Microsoft Office SharePoint CVE-2020-0954 Microsoft Office SharePoint XSS Vulnerability Moderate
Microsoft Office SharePoint CVE-2020-0926 Microsoft Office SharePoint XSS Vulnerability Important
Microsoft Scripting Engine CVE-2020-0968 Scripting Engine Memory Corruption Vulnerability Moderate
Microsoft Scripting Engine CVE-2020-0966 VBScript Remote Code Execution Vulnerability Low
Microsoft Scripting Engine CVE-2020-0895 Windows VBScript Engine Remote Code Execution Vulnerability Low
Microsoft Scripting Engine CVE-2020-0969 Chakra Scripting Engine Memory Corruption Vulnerability Critical
Microsoft Scripting Engine CVE-2020-0970 Scripting Engine Memory Corruption Vulnerability Critical
Microsoft Scripting Engine CVE-2020-0967 VBScript Remote Code Execution Vulnerability Moderate
Microsoft Windows CVE-2020-0942 Connected User Experiences and Telemetry Service Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-0965 Microsoft Windows Codecs Library Remote Code Execution Vulnerability Critical
Microsoft Windows CVE-2020-0940 Windows Push Notification Service Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-0934 Windows Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-1029 Connected User Experiences and Telemetry Service Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-1011 Windows Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-1094 Windows Work Folder Service Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-1016 Windows Push Notification Service Information Disclosure Vulnerability Important
Microsoft Windows CVE-2020-0794 Windows Denial of Service Vulnerability Important
Microsoft Windows CVE-2020-1017 Windows Push Notification Service Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-0944 Connected User Experiences and Telemetry Service Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-1006 Windows Push Notification Service Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-1009 Windows Elevation of Privilege Vulnerability Important
Microsoft Windows CVE-2020-0981 Windows Token Security Feature Bypass Vulnerability Important
Microsoft Windows CVE-2020-1001 Windows Push Notification Service Elevation of Privilege Vulnerability Important
Microsoft Windows DNS CVE-2020-0993 Windows DNS Denial of Service Vulnerability Important
Open Source Software CVE-2020-1026 MSR JavaScript Cryptography Library Security Feature Bypass Vulnerability Important
Remote Desktop Client CVE-2020-0919 Microsoft Remote Desktop App for Mac Elevation of Privilege Vulnerability Important
Visual Studio CVE-2020-0899 Microsoft Visual Studio Elevation of Privilege Vulnerability Important
Visual Studio CVE-2020-0900 Visual Studio Extension Installer Service Elevation of Privilege Vulnerability Important
Windows Defender CVE-2020-1002 Microsoft Defender Elevation of Privilege Vulnerability Important
Windows Defender CVE-2020-0835 Windows Defender Antimalware Platform Hard Link Elevation of Privilege Vulnerability Important
Windows Hyper-V CVE-2020-0918 Windows Hyper-V Elevation of Privilege Vulnerability Important
Windows Hyper-V CVE-2020-0910 Windows Hyper-V Remote Code Execution Vulnerability Critical
Windows Hyper-V CVE-2020-0917 Windows Hyper-V Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-0699 Win32k Information Disclosure Vulnerability Important
Windows Kernel CVE-2020-1027 Windows Kernel Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-1003 Windows Kernel Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-0955 Windows Kernel Information Disclosure in CPU Memory Access Important
Windows Kernel CVE-2020-1015 Windows Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-1000 Windows Kernel Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-1007 Windows Kernel Information Disclosure Vulnerability Important
Windows Kernel CVE-2020-0957 Win32k Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-0936 Windows Scheduled Task Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-0956 Win32k Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-0962 Win32k Information Disclosure Vulnerability Important
Windows Kernel CVE-2020-0821 Windows Kernel Information Disclosure Vulnerability Important
Windows Kernel CVE-2020-0913 Windows Kernel Elevation of Privilege Vulnerability Important
Windows Kernel CVE-2020-0888 DirectX Elevation of Privilege Vulnerability Important
Windows Media CVE-2020-0948 Media Foundation Memory Corruption Vulnerability Critical
Windows Media CVE-2020-0937 Media Foundation Information Disclosure Vulnerability Important
Windows Media CVE-2020-0949 Media Foundation Memory Corruption Vulnerability Critical
Windows Media CVE-2020-0939 Media Foundation Information Disclosure Vulnerability Important
Windows Media CVE-2020-0950 Media Foundation Memory Corruption Vulnerability Critical
Windows Media CVE-2020-0946 Media Foundation Information Disclosure Vulnerability Important
Windows Media CVE-2020-0947 Media Foundation Information Disclosure Vulnerability Important
Windows Media CVE-2020-0945 Media Foundation Information Disclosure Vulnerability Important
Windows Update Stack CVE-2020-0996 Windows Update Stack Elevation of Privilege Vulnerability Important
Windows Update Stack CVE-2020-1014 Microsoft Windows Update Client Elevation of Privilege Vulnerability Important
Windows Update Stack CVE-2020-0983 Windows Elevation of Privilege Vulnerability Important
Windows Update Stack CVE-2020-0985 Windows Update Stack Elevation of Privilege Vulnerability Important

Update 4/14/20: Microsoft made a correction to CVE-2020-0968 and changed it to not being exploited. So only three zero-days this Patch Tuesday.

Re-Blogged from Source : Bleeping Computer

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