Critical Vulnerability in Linux Kernel: s390/pkey Key Management Flaw
Summary
DEBIAN-CVE-2024-42155: In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Wipe copies of protected- and secure-keys Although the clear-key of neither protected- nor secure-keys is accessible, this key material shoul... Affects linux versions < 6.9.9-1. Fixed in 6.9.9-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interaction. It is known for its stability, performance, and security features. However, vulnerabilities can arise, impacting the integrity and confidentiality of sensitive data. This specific vulnerability affects the key management system within the s390 architecture, which is crucial for secure operations.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the s390/pkey subsystem, where copies of protected and secure keys are not adequately wiped from the stack after use. Although the clear-key of neither protected nor secure keys is accessible, this key material should only be visible to the calling process. Failure to properly manage these keys could lead to unauthorized access to sensitive information, potentially compromising system security.
How To Fix
Minimum fixed version
6.9.9-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds provided for this vulnerability. It is highly recommended to apply the patch as soon as it becomes available to mitigate any potential risks.
Conclusion
The vulnerability identified in the Linux kernel's s390/pkey subsystem poses a significant risk due to improper management of sensitive key material. It is crucial for users to update their systems to the patched version to mitigate potential security threats. Regular monitoring using tools like Vulert can help maintain awareness of vulnerabilities in open-source software.
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FAQ
The vulnerability involves inadequate management of protected and secure keys in the s390/pkey subsystem of the Linux kernel, leading to potential exposure of sensitive key material.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By simply using a manifest file like package-lock.json, you can check for vulnerabilities without needing to install any software.
If exploited, this vulnerability could allow unauthorized access to sensitive information, compromising the security of the system and potentially leading to further attacks.
Yes, the vulnerability is fixed in version 6.9.9-1 of the Linux package. It is crucial to update to this version to ensure protection against the vulnerability.
Detailed information about this vulnerability can be found in the Debian CVE database, which provides insights into the nature of the issue and the affected packages.
References
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