net: systemport: Add global locking for descriptor lifecycle
Summary
GSD-2021-1002623: net: systemport: Add global locking for descriptor lifecycle. Affects Kernel versions >= 80105befdb4b8cea924711b40b2462b87df65b62, < de57f62f76450b934de8203711bdc4f7953c3421. 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 essential services for the computer's hardware and software to communicate. The net subsystem in the Linux Kernel handles network-related functionality, including network protocols, socket handling, and network device drivers. Within the net subsystem, the systemport component manages the lifecycle of descriptors. Descriptors are data structures used to represent network connections and handle network traffic. The vulnerability in the systemport component arises from a lack of global locking, which can lead to race conditions and potential security vulnerabilities.
Vulnerability Detail
The vulnerability in the systemport component of the Linux Kernel allows for potential security vulnerabilities due to the absence of global locking for descriptor lifecycle management. This lack of locking can result in race conditions, where multiple threads or processes access and modify descriptors concurrently, leading to inconsistent or corrupted data. Attackers may exploit these race conditions to manipulate network connections, intercept or modify network traffic, or cause denial-of-service conditions. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. However, users can consider applying general security practices such as restricting access to vulnerable systems, implementing network segmentation, and monitoring network traffic for any suspicious activity.
Conclusion
The net: systemport: Add global locking for descriptor lifecycle vulnerability in the Linux Kernel's net subsystem highlights the importance of proper synchronization and serialization in managing network descriptors. Users are advised to update their Linux Kernel to the fixed version to ensure the security and stability of their systems. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is an open-source monolithic Unix-like computer operating system kernel that provides essential services for hardware and software communication.
The net subsystem in the Linux Kernel handles network-related functionality, including network protocols, socket handling, and network device drivers.
The systemport component in the net subsystem manages the lifecycle of descriptors, which are data structures used to represent network connections and handle network traffic.
The impact of the vulnerability is not yet proven. However, it could potentially lead to security vulnerabilities, such as manipulation of network connections, interception or modification of network traffic, or denial-of-service conditions.
The vulnerability can be mitigated by updating the Linux Kernel to version v4.9.294 or later, which includes the fix for the lack of global locking in the systemport component.
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