| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| Windows Layer-2 Bridge Network Driver Information Disclosure Vulnerability |
| Active Template Library Elevation of Privilege Vulnerability |
| Windows Telephony Server Elevation of Privilege Vulnerability |
| Summary
Microsoft was notified that an elevation of privilege vulnerability exists in Windows Update, potentially enabling an attacker with basic user privileges to reintroduce previously mitigated vulnerabilities or circumvent some features of Virtualization Based Security (VBS). However, an attacker attempting to exploit this vulnerability requires additional interaction by a privileged user to be successful.
Microsoft is developing a security update to mitigate this threat, but it is not yet available. Guidance to help customers reduce the risks associated with this vulnerability and to protect their systems until the mitigation is available in a Windows security update is provided in the Recommended Actions section of this CVE.
This CVE will be updated, and customers will be notified when the official mitigation is available in a Windows security update. We highly encourage customers to subscribe to Security Update Guide notifications to receive an alert when this update occurs.
Details
A security researcher informed Microsoft of an elevation of privilege vulnerability in Windows Update potentially enabling an attacker with basic user privileges to reintroduce previously mitigated vulnerabilities or circumvent some features of VBS. For exploitation to succeed, an attacker must trick or convince an Administrator or a user with delegated permissions into performing a system restore which inadvertently triggers the vulnerability.
Microsoft is developing a security update that will mitigate this vulnerability, but it is not yet available. This CVE will be updated with new information and links to the security updates once available. We highly encourage customers subscribe to Security Update Guide notifications to be alerted of updates. See Microsoft Technical Security Notifications and Security Update Guide Notification System News: Create your profile now – Microsoft Security Response Center.
Microsoft is not aware of any attempts to exploit this vulnerability. However, a public presentation regarding this vulnerability was hosted at BlackHat on August 7, 2024. The presentation was appropriately coordinated with Microsoft but may change the threat landscape. Customers concerned with these risks should reference the guidance provided in the Recommended Actions section to protect their systems.
Recommended Actions
The following recommendations do not mitigate the vulnerability but can be used to reduce the risk of exploitation until the security update... |
| Summary:
Microsoft was notified that an elevation of privilege vulnerability exists in Windows based systems supporting Virtualization Based Security (VBS), including a subset of Azure Virtual Machine SKUS. This vulnerability enables an attacker with administrator privileges to replace current versions of Windows system files with outdated versions. By exploiting this vulnerability, an attacker could reintroduce previously mitigated vulnerabilities, circumvent some features of VBS, and exfiltrate data protected by VBS.
Microsoft is developing a security update to mitigate this threat, but it is not yet available. Guidance to help customers reduce the risks associated with this vulnerability and to protect their systems until the mitigation is available in a Windows security update is provided in the Recommended Actions section of this CVE.
This CVE will be updated when the mitigation is available in a Windows security update. We highly encourage customers to subscribe to Security Update Guide notifications to receive an alert when this update occurs.
Update: August 13, 2024
Microsoft has released the August 2024 security updates that include an opt-in revocation policy mitigation to address this vulnerability. Customers running affected versions of Windows are encouraged to review KB5042562: Guidance for blocking rollback of virtualization-based security related updates to assess if this opt-in policy meets the needs of their environment before implementing this mitigation. There are risks associated with this mitigation that should be understood prior to applying it to your systems. Detailed information about these risks is also available in KB5042562.
Details:
A security researcher informed Microsoft of an elevation of privilege vulnerability in Windows 10, Windows 11, Windows Server 2016, and higher based systems including Azure Virtual Machines (VM) that support VBS. For more information on Windows versions and VM SKUs supporting VBS, reference: Virtualization-based Security (VBS) | Microsoft Learn.
The vulnerability enables an attacker with administrator privileges on the target system to replace current Windows system files with outdated versions. Successful exploitation provides an attacker with the ability to reintroduce previously mitigated vulnerabilities, circumvent VBS security features, and exfiltrate data protected by VBS.
Microsoft is developing a security update that will revoke outdated, unpatched VBS system files to mitigate this... |
| Windows Smart Card Resource Management Server Security Feature Bypass Vulnerability |
| Internet Connection Sharing (ICS) Remote Code Execution Vulnerability |
| Windows Initial Machine Configuration Elevation of Privilege Vulnerability |
| Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability |
| Windows Update Stack Elevation of Privilege Vulnerability |
| Windows Kernel-Mode Driver Elevation of Privilege Vulnerability |
| Windows Kernel-Mode Driver Elevation of Privilege Vulnerability |
| Windows Kernel-Mode Driver Elevation of Privilege Vulnerability |
| Windows SmartScreen Security Feature Bypass Vulnerability |
| Security Center Broker Information Disclosure Vulnerability |
| Windows Kernel Elevation of Privilege Vulnerability |
| Windows OLE Remote Code Execution Vulnerability |
| Windows Kernel Information Disclosure Vulnerability |
| Windows DWM Core Library Elevation of Privilege Vulnerability |
| Microsoft DWM Core Library Elevation of Privilege Vulnerability |
