Critical Privilege Escalation Vulnerability in Intel Microcode Package
Summary
UBUNTU-CVE-2024-23918: Improper conditions check in some Intel(R) Xeon(R) processor memory controller configurations when using Intel(R) SGX 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
The Intel Microcode package is essential for updating the microcode of Intel processors, which helps in optimizing performance and fixing bugs. This package is particularly important for systems running on Ubuntu, as it ensures that the processors operate correctly and securely. However, a recent vulnerability has been identified that could allow unauthorized privilege escalation under certain conditions.
Vulnerability Detail
The vulnerability, identified as CVE-2024-23918, arises from improper conditions checks in specific Intel Xeon processor memory controller configurations when using Intel SGX. This flaw could enable a privileged user to escalate their privileges through local access, potentially compromising the system's integrity and confidentiality. The vulnerability has a CVSS score of 8.8, indicating a high severity level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can limit access to the affected systems to trusted personnel only, thereby reducing the risk of privilege escalation until the package can be updated.
Conclusion
The CVE-2024-23918 vulnerability in the Intel Microcode package poses a significant risk of privilege escalation. Users are strongly advised to update their systems to the latest patched version to mitigate this risk. Additionally, temporary workarounds can help reduce exposure until the update is applied.
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FAQ
CVE-2024-23918 is a vulnerability in the Intel Microcode package that allows for potential privilege escalation due to improper checks in memory controller configurations.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If exploited, this vulnerability could allow a malicious user to gain elevated privileges, potentially leading to unauthorized access to sensitive data and system control.
Yes, a patched version of the Intel Microcode package is available. Users should update to version 3.20241112.0ubuntu0.20.04.1 or later.
If an immediate update is not possible, restrict access to the affected systems to trusted users as a temporary measure.
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