CVE-2023-20569: AMD: CVE-2023-20569 Return Address Predictor

Overview

Severity
N/A
Category
Information Disclosure
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2023-Aug
Released
2023-08-08
Last Updated
2023-08-15
EPSS Score
0.63% (percentile: 70.4%)

FAQ

Why is this AMD CVE included in the Security Update Guide? The vulnerability assigned to this CVE is in certain processor models offered by AMD. The mitigation for this vulnerability requires a Windows update. This CVE is being documented in the Security Update Guide to announce that the latest builds of Windows enable the mitigation and provide protection against the vulnerability. Please see the following for more information: AMD-SB-7005 Are any additional steps required to protect my system after installing the August Windows updates? Customers who allow untrusted users to execute arbitrary code might wish to implement some extra security features within their systems. These features protect against the intra-process disclosure vectors that this speculative execution vulnerability describes. See the following for more information. Microsoft Windows client customers: See Microsoft Knowledge Base Article 4073119. Microsoft Windows Server/Azure Stack HCI customers: See Microsoft Knowledge Base Article 4072698 for additional information, including workarounds. Microsoft Azure has taken steps to address the security vulnerabilities at the hypervisor level to protect VMs running in Azure. More information can be found here. Can I expect any performance impact after I configure the registry keys? In some cases, installing these updates will have a performance impact. In testing Microsoft has seen some performance impact with these mitigations, in particular when hyperthreading is disabled. Microsoft values the security of its software and services and has made the decision to implement certain mitigation strategies in an effort to better secure our products. In some cases, mitigations are not enabled by default to allow users and administrators to evaluate the performance impact and risk exposure before deciding to enable the mitigations. We continue to work with hardware vendors to improve performance while maintaining a high level of security. Are Microsoft Azure

Affected Products (32)

Windows

  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows 11 version 21H2 for x64-based Systems
  • Windows 11 version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows 10 Version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows 11 Version 22H2 for ARM64-based Systems
  • Windows 11 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for ARM64-based Systems
  • Windows 10 Version 22H2 for 32-bit Systems
  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)

Azure

  • Azure Virtual Machines

ESU

  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)

Security Updates (16)

Revision History

  • 2023-08-08: Information published.
  • 2023-08-15: Revised the Affected Products table to include Azure Virtual Machines as customers who use custom maintenance controls are affected by CVE-2023-20569 and are required to take action to protect their resources. Microsoft has notified the customers using Azure Virtual Machines with custom maintenance controls through Azure Service Health in the Azure Portal.