net: systemport: Add global locking for descriptor lifecycle
Summary
GSD-2021-1002754: net: systemport: Add global locking for descriptor lifecycle. Affects Kernel versions >= 80105befdb4b8cea924711b40b2462b87df65b62, < eb4687c7442942e115420a30185f8d83faf37696. No fix is published. How to fix ↓
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Background
The Linux Kernel is an open-source monolithic Unix-like computer operating system kernel. It provides the core functionality for the Linux operating system. The net subsystem in the Linux Kernel is responsible for network-related operations. The systemport component within the net subsystem manages the lifecycle of descriptors. Descriptors are data structures used to represent network connections and other network-related entities. The management of descriptors is critical for the proper functioning of network operations.
Vulnerability Detail
The net: systemport component in the Linux Kernel prior to version v5.15.11 suffers from a vulnerability that allows for a race condition during the lifecycle management of descriptors. This race condition can lead to various security issues, including potential use-after-free vulnerabilities and other memory corruption bugs. An attacker could potentially exploit this vulnerability to gain unauthorized access, execute arbitrary code, or cause a denial-of-service condition.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can apply the patch provided in commit eb4687c7442942e115420a30185f8d83faf37696 manually. This patch adds the necessary global locking mechanism to address the race condition in the descriptor lifecycle management. Applying the patch ensures that the vulnerability is mitigated even without updating the entire kernel. However, it is recommended to update the kernel to the latest version for a comprehensive fix.
Conclusion
The net: systemport component in the Linux Kernel prior to version v5.15.11 suffers from a vulnerability that can lead to various security issues. It is crucial to update the kernel to the latest version or apply the provided patch to mitigate this vulnerability. For further assistance and support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can lead to various security issues, including potential use-after-free vulnerabilities and other memory corruption bugs. An attacker could potentially exploit this vulnerability to gain unauthorized access, execute arbitrary code, or cause a denial-of-service condition.
You can use Vulert's playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software, without requiring access to the code or installation.
Yes, the fix for this vulnerability is available in Linux Kernel version v5.15.11 or later. It is recommended to update the kernel to the latest version to ensure the vulnerability is mitigated.
Yes, a workaround is available in the form of a patch provided in commit eb4687c7442942e115420a30185f8d83faf37696. Applying this patch manually adds the necessary global locking mechanism to address the vulnerability. However, it is still recommended to update the kernel to the latest version for a comprehensive fix.
You can find more information about this vulnerability in the Linux Kernel security advisory or the CVE entry associated with it. Additionally, you can reach out to info@devnack.com for further support on vulnerability remediation.
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