Vulnerability in Kernel package: rxrpc: Fix listen() setting the bar too high for the prealloc rings
Summary
GSD-2022-1003889: rxrpc: Fix listen() setting the bar too high for the prealloc rings. Affects Kernel versions >= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61, < 4a3a78b7918bdd723d8c7c9786522ca969bffcc4. No fix is published. How to fix ↓
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Background
The Kernel package is an essential component of the Linux operating system, responsible for managing the system's core functions and providing an interface between hardware and software. It includes various subsystems and drivers that enable the proper functioning of the system. One of these subsystems is rxrpc, which is used for establishing and managing network connections. However, a vulnerability has been identified in the listen() function of rxrpc, which sets the bar too high for the prealloc rings.
Vulnerability Detail
The vulnerability in the rxrpc listen() function allows an attacker to exploit the prealloc rings, potentially leading to a denial-of-service (DoS) attack. By setting the bar too high, the function can exhaust system resources, causing the system to become unresponsive or crash. This vulnerability was introduced in version v4.9 of the Linux Kernel and has been fixed in version v4.19.247.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the rxrpc listen() function of the Kernel package can be exploited to launch a denial-of-service (DoS) attack. It is crucial to update the Linux Kernel to version v4.19.247 or later to fix this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The vulnerability can be exploited to launch a denial-of-service (DoS) attack, potentially causing the system to become unresponsive or crash.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the playground will analyze it for any open-source vulnerabilities, including this one.
Yes, a patch has been released in version v4.19.247 of the Linux Kernel. It is recommended to update to this version or a later one to fix the vulnerability.
Yes, this vulnerability can be exploited remotely if the affected system is accessible over the network.
There are no known instances of this vulnerability being exploited in the wild. However, it is still important to apply the patch to mitigate the risk.
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