Sensitive Information Exposure in Intel Microcode: CVE-2024-45332
Summary
CVE-2024-45332: Exposure of sensitive information caused by shared microarchitectural predictor state that influences transient execution in the indirect branch predictors for some Intel(R) Processors may allow an authenticated user to... Affects intel-ucode versions < 20250512-r0. Fixed in 20250512-r0. How to fix ↓
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Background
Intel Microcode is a critical component of Intel processors that provides low-level control and updates to the processor's functionality. It is responsible for implementing various features and optimizations, ensuring the processor operates efficiently and securely. However, certain vulnerabilities can expose sensitive information, particularly through shared microarchitectural states, which can be exploited if not addressed promptly.
Vulnerability Detail
CVE-2024-45332 is a vulnerability that arises from the exposure of sensitive information due to shared microarchitectural predictor state. This state can influence transient execution in the indirect branch predictors of some Intel processors. An authenticated user with local access may exploit this vulnerability to potentially enable information disclosure, leading to unauthorized access to sensitive data. The vulnerability affects multiple versions of the Intel microcode across Debian ecosystems, making it critical for users to be aware and take action.
How To Fix
Minimum fixed version
20250512-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 workaround, users can limit local access to the affected systems and ensure that only trusted users have authenticated access. Additionally, monitoring system logs for unusual activity may help in identifying potential exploitation attempts.
Conclusion
CVE-2024-45332 represents a significant risk for users of Intel Microcode, particularly in Debian environments. It is crucial to update to the latest patched version to mitigate the risk of sensitive information exposure. Users should also consider implementing workarounds to enhance security while awaiting updates.
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FAQ
CVE-2024-45332 is a vulnerability in Intel Microcode that allows for potential information disclosure due to shared microarchitectural predictor state.
Users of Intel processors running the affected versions of Intel Microcode on Debian 11, 12, and 13 are at risk.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
If updating is not possible, consider implementing strict access controls and monitoring for unusual activity as a temporary measure.
More details can be found in the official CVE database and through security advisories related to Intel Microcode.
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