Intel Microcode Vulnerability: Information Disclosure Risk in Intel Processors
Summary
UBUNTU-CVE-2023-38575: Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure 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
The 'intel-microcode' package provides microcode updates for Intel processors, enhancing their performance and security. It is crucial for maintaining system stability and security by ensuring that the processors operate with the latest fixes for known issues. However, certain versions of this package are susceptible to a vulnerability that may allow unauthorized information disclosure.
Vulnerability Detail
The vulnerability identified as CVE-2023-38575 arises from non-transparent sharing of return predictor targets between contexts in some Intel processors. This flaw could enable an authorized user to potentially access sensitive information through local access, posing a significant risk to data confidentiality. The vulnerability affects various versions of the 'intel-microcode' package across multiple Ubuntu LTS distributions.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, no specific workarounds have been provided for this vulnerability. The best course of action is to apply the available updates as soon as possible.
Conclusion
The intel-microcode vulnerability (CVE-2023-38575) poses a risk of information disclosure in certain Intel processors. Users are advised to update their packages to the latest versions to mitigate this risk. Regular monitoring and timely updates are essential for maintaining system security.
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FAQ
CVE-2023-38575 is a vulnerability in the intel-microcode package that allows potential information disclosure due to non-transparent sharing of return predictor targets in Intel processors.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The CVSS score for this vulnerability is 5.5, indicating a medium severity level.
Yes, there are patched versions available for the affected intel-microcode package across various Ubuntu LTS distributions.
If you are unable to update your package, it is recommended to monitor your system for any suspicious activity and consider implementing additional security measures until the update can be applied.
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