Vulnerability in Kernel: rxrpc listen() Prealloc Rings
Summary
GSD-2022-1004007: rxrpc: Fix listen() setting the bar too high for the prealloc rings. Affects Kernel versions >= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61, < 616f76498d5ddf26b997caf64a95cda3c8a55533. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and supports various subsystems. The vulnerability affects the rxrpc module, which is responsible for providing a reliable, sequenced, and acknowledged datagram service over UDP. The issue arises from a flaw in the listen() function, which sets the bar too high for the preallocated rings.
Vulnerability Detail
The vulnerability in the rxrpc module's listen() function allows an attacker to exploit the preallocated rings, potentially leading to denial-of-service (DoS) attacks or memory corruption. By setting the bar too high, the function fails to properly handle incoming connections, causing resource exhaustion or memory corruption. This can result in system instability, crashes, or unauthorized access to sensitive information. The vulnerability was introduced in Kernel version v4.9 and fixed in v4.14.283.
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, as a general best practice, it is advisable to implement proper network security measures, such as firewall rules and network segmentation, to mitigate the risk of potential attacks.
Conclusion
The vulnerability in the Kernel's rxrpc module's listen() function can lead to various security and stability issues. It is crucial to update the Linux Kernel to version v4.14.283 or later to mitigate the risk. Implementing proper network security measures is also recommended. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to denial-of-service (DoS) attacks, system instability, crashes, or unauthorized access to sensitive information.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and it will provide real-time monitoring and alerts for open-source vulnerabilities.
Yes, the vulnerability has been fixed in Linux Kernel version v4.14.283. It is recommended to update to this version or later to mitigate the risk.
At the time of this report, no known exploits for this vulnerability have been reported. However, it is important to apply the necessary updates and security measures to protect against potential attacks.
The vulnerability was discovered by the Linux Kernel security team during routine security audits and was subsequently fixed in the Kernel's codebase.
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