Intel Microcode Vulnerability: Information Disclosure Risk in Ubuntu Packages
Summary
UBUNTU-CVE-2022-21127: Incomplete cleanup in specific special register read operations for some Intel(R) Processors may allow an authenticated 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 system stability and performance. It is crucial for ensuring that the CPU operates correctly and securely. This package is particularly important for users running Ubuntu LTS versions, as it helps mitigate hardware vulnerabilities and improve overall system security.
Vulnerability Detail
The vulnerability identified as CVE-2022-21127 involves incomplete cleanup in specific special register read operations for some Intel processors. This flaw could allow an authenticated user to potentially enable information disclosure via local access. The vulnerability poses a risk of exposing sensitive information, which could be exploited by malicious actors with local access to the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the available updates as soon as possible.
Conclusion
The intel-microcode vulnerability (CVE-2022-21127) poses a significant risk of information disclosure for users of affected Ubuntu versions. It is crucial to apply the necessary updates to mitigate this risk. Users can utilize tools like Vulert to monitor and alert for open-source vulnerabilities in their software, ensuring ongoing security.
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FAQ
CVE-2022-21127 is a vulnerability in the intel-microcode package that allows for potential information disclosure due to incomplete cleanup in specific register read operations.
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 of this vulnerability is 5.5, indicating a medium severity level.
For Ubuntu 18.04, no subscription is required to access the fixed version of the intel-microcode package.
If you cannot update the package immediately, ensure that you limit local access to the system and monitor for any unusual activity until the update can be applied.
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