Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability
Microsoft Windows VMSwitch Denial of Service Vulnerability
Windows Secure Kernel Mode Security Feature Bypass Vulnerability
Windows Partition Management Driver Elevation of Privilege Vulnerability
Windows Key Storage Provider Security Feature Bypass Vulnerability
Windows Ancillary Function Driver for WinSock Information Disclosure Vulnerability
Windows Remote Assistance Information Disclosure Vulnerability
Microsoft.PowerShell.Utility Module WDAC Security Feature Bypass Vulnerability
<p>A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system.</p> <p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application.</p> <p>The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle these requests.</p>
<p>A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system.</p> <p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application.</p> <p>The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle these requests.</p>
Windows SMB Information Disclosure Vulnerability
<p>An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system.</p> <p>There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage.</p> <p>The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory.</p>
<p>An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a user’s system.</p> <p>There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document or by convincing a user to visit an untrusted webpage.</p> <p>The update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory.</p>
<p>An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a user’s system.</p> <p>There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document or by convincing a user to visit an untrusted webpage.</p> <p>The update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory.</p>
Windows Remote Procedure Call Runtime Security Feature Bypass Vulnerability
Windows Print Spooler Information Disclosure Vulnerability
Integer overflows were discovered in the functions grubcmdinitrd and grubinitrdinit 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 use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing."
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.
<p>A security feature bypass vulnerability exists when Microsoft Windows fails to handle file creation permissions, which could allow an attacker to create files in a protected Unified Extensible Firmware Interface (UEFI) location.</p> <p>To exploit this vulnerability, an attacker could run a specially crafted application to bypass Unified Extensible Firmware Interface (UEFI) variable security in Windows.</p> <p>The security update addresses the vulnerability by correcting security feature behavior to enforce permissions.</p>
Windows Extensible Firmware Interface Security Feature Bypass Vulnerability
Windows Installer Spoofing Vulnerability
Windows Hello Security Feature Bypass Vulnerability
Windows Installer Denial of Service Vulnerability
Windows InstallService Elevation of Privilege Vulnerability
User Profile Service Denial of Service Vulnerability
Windows Hello Security Feature Bypass Vulnerability
BitLocker Security Feature Bypass Vulnerability
Microsoft Windows Kernel contains an unspecified vulnerability that allows for information disclosure. Successful exploitation allows attackers to read the contents of kernel memory from a user-mode process.
<p>An information disclosure vulnerability exists when the Windows Enterprise App Management Service improperly handles certain file operations. An attacker who successfully exploited this vulnerability could read arbitrary files.</p> <p>An attacker with unprivileged access to a vulnerable system could exploit this vulnerability.</p> <p>The security update addresses the vulnerability by ensuring the Windows Enterprise App Management Service properly handles file operations.</p>