Denial of Service Risk in Intel Microcode: CVE-2024-31068
Summary
CVE-2024-31068: Improper Finite State Machines (FSMs) in Hardware Logic for some Intel(R) Processors may allow privileged user to potentially enable denial of service via local access. Affects intel-ucode versions < 20250211-r0. Fixed in 20250211-r0. 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 execute instructions efficiently and securely. It plays a significant role in maintaining system stability and performance. However, certain versions of Intel microcode across Debian ecosystems (Debian 11, 12, and 13) are vulnerable to a flaw that could allow a privileged user to cause a denial of service through improper finite state machine (FSM) handling.
Vulnerability Detail
The vulnerability identified as CVE-2024-31068 arises from improper handling of finite state machines (FSMs) in the hardware logic of some Intel processors. This flaw can potentially be exploited by a privileged user with local access to the system, leading to a denial of service condition. The ramifications include system instability and potential downtime, which could affect critical applications relying on the affected processors. The vulnerability is particularly concerning for environments that require high availability and reliability.
How To Fix
Minimum fixed version
20250211-r0
This is the first release that contains the fix.
sudo apk add --upgrade intel-ucodeTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can limit local access to the system to mitigate the risk of exploitation. Additionally, monitoring system logs for unusual activity may help in identifying potential attempts to exploit this vulnerability.
Conclusion
CVE-2024-31068 presents a significant risk to systems using Intel microcode across various Debian distributions. Users are strongly advised to update their systems to the latest patched versions to mitigate the risk of denial of service attacks. Utilizing tools like Vulert can help in monitoring and identifying vulnerabilities in your software.
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FAQ
CVE-2024-31068 is a vulnerability in Intel microcode that allows a privileged user to potentially cause a denial of service via improper finite state machine handling.
The vulnerability affects Intel microcode on Debian 11, 12, and 13 systems.
You can use Vulert, which monitors open-source vulnerabilities in real-time. By uploading your manifest file like package-lock.json, you can check if your application is affected by this vulnerability.
Yes, patches are available for the Intel microcode package in the latest updates for Debian 11, 12, and 13.
If immediate updates are not possible, consider restricting local access to the system and monitoring for any suspicious activity as a temporary workaround.
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