A remote code execution vulnerability exists when Microsoft .NET Framework processes input. An attacker who successfully exploited this vulnerability could take control of an affected system. To exploit the vulnerability, an attacker would need to be able to upload a specially crafted file to a web application. The security update addresses the vulnerability by correcting how .NET Framework processes input.

Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.

GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.

GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.

A remote code execution vulnerability exists in the way that Microsoft Windows Codecs Library handles objects in memory, aka 'Microsoft Windows Codecs Library Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-1425.

A remoted code execution vulnerability exists in the way that Microsoft Windows Codecs Library handles objects in memory, aka 'Microsoft Windows Codecs Library Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-1457.

An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory, aka 'Windows GDI Information Disclosure Vulnerability'.

An elevation of privilege vulnerability exists in the way that the SharedStream Library handles objects in memory, aka 'Windows SharedStream Library Elevation of Privilege Vulnerability'.

An information disclosure vulnerability exists when Skype for Business is accessed via Microsoft Edge (EdgeHTML-based), aka 'Skype for Business via Microsoft Edge (EdgeHTML-based) Information Disclosure Vulnerability'.

An elevation of privilege vulnerability exists when the MpSigStub.exe for Defender allows file deletion in arbitrary locations.To exploit the vulnerability, an attacker would first have to log on to the system, aka 'Microsoft Defender Elevation of Privilege Vulnerability'.

An elevation of privilege vulnerability exists in the way that the Windows Network Connections Service handles objects in memory, aka 'Windows Network Connections Service Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1373, CVE-2020-1390, CVE-2020-1427, CVE-2020-1428.

An elevation of privilege vulnerability exists in the way that the Windows Network Location Awareness Service handles objects in memory, aka 'Windows Network Location Awareness Service Elevation of Privilege Vulnerability'.

A remote code execution vulnerability exists when the Windows font library improperly handles specially crafted fonts.For all systems except Windows 10, an attacker who successfully exploited the vulnerability could execute code remotely, aka 'Windows Font Library Remote Code Execution Vulnerability'.

A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory, aka 'GDI+ Remote Code Execution Vulnerability'.

An elevation of privilege vulnerability exists in the way that the Windows Sync Host Service handles objects in memory, aka 'Windows Sync Host Service Elevation of Privilege Vulnerability'.

An information disclosure vulnerability exists when Microsoft Edge PDF Reader improperly handles objects in memory, aka 'Microsoft Edge PDF Information Disclosure Vulnerability'.

An information disclosure vulnerability exists when Skype for Business is accessed via Internet Explorer, aka 'Skype for Business via Internet Explorer Information Disclosure Vulnerability'.

An elevation of privilege vulnerability exists when the Windows UPnP Device Host improperly handles memory.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Windows UPnP Device Host Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1354.

An elevation of privilege vulnerability exists when Windows Error Reporting manager improperly handles a process crash, aka 'Windows Error Reporting Manager Elevation of Privilege Vulnerability'.

An elevation of privilege vulnerability exists in the way that the Windows Network Connections Service handles objects in memory, aka 'Windows Network Connections Service Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1373, CVE-2020-1390, CVE-2020-1427, CVE-2020-1438.