Critical Vulnerability in Intel Microcode: Escalation of Privilege Risk
Summary
UBUNTU-CVE-2023-45745: Improper input validation in some Intel(R) TDX module software before version 1.5.05.46.698 may allow a privileged user to potentially enable escalation of privilege via local access. Affects intel-microcode versions 1.20130906.1ubuntu2 – 3.20210608.0ubuntu0.14.04.1+esm1. No fix is published. How to fix ↓
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Background
Intel Microcode is a crucial component that provides low-level control over Intel processors, enabling them to function correctly and securely. It is responsible for implementing fixes and improvements to the processor's functionality. The vulnerability identified as CVE-2023-45745 affects various versions of Intel Microcode across multiple Ubuntu LTS distributions, exposing systems to potential privilege escalation attacks.
Vulnerability Detail
The vulnerability arises from improper input validation in some Intel(R) TDX module software prior to version 1.5.05.46.698. This flaw allows a privileged user to potentially escalate their privileges through local access, which could lead to unauthorized access to sensitive data or system controls. The severity of this vulnerability is underscored by its CVSS score of 7.9, indicating a high risk to affected systems.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds provided for this vulnerability. The best course of action is to apply the available updates as soon as they are released.
Conclusion
The vulnerability CVE-2023-45745 in Intel Microcode poses a significant risk of privilege escalation for users of affected Ubuntu LTS distributions. It is essential to apply the necessary updates to mitigate this risk and ensure the security of your systems.
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FAQ
CVE-2023-45745 is a vulnerability in Intel Microcode that allows for potential escalation of privileges due to improper input validation.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
If exploited, this vulnerability could allow a privileged user to gain unauthorized access to sensitive data or system controls, leading to severe security breaches.
Yes, patches are available for various versions of Intel Microcode across supported Ubuntu distributions. Users should update to the latest version to mitigate the risk.
While there are no specific workarounds, it is crucial to monitor your systems closely and apply the patch as soon as possible to protect against potential exploitation.
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