Vulnerability in Kernel package: rxrpc: Fix call timer start racing with call destruction
Summary
GSD-2022-1001432: rxrpc: Fix call timer start racing with call destruction. Affects Kernel versions >= a158bdd3247b9656df36ba133235fff702e9fdc3, < 54df5a37f1d951ed27fd47bf9b15a42279582110. 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 functionality. It provides an interface between hardware and software, allowing applications to communicate with the computer's hardware. The rxrpc module within the Kernel package is responsible for handling remote procedure calls (RPC) over UDP/IP. RPC allows processes to execute code on remote systems as if they were local. However, a vulnerability has been discovered in the rxrpc module that could lead to a race condition between the start of a call timer and the destruction of the call itself.
Vulnerability Detail
The vulnerability in the rxrpc module occurs when a call timer is started concurrently with the destruction of the call. This race condition can result in various issues, including memory corruption or use-after-free vulnerabilities. An attacker could potentially exploit this vulnerability to execute arbitrary code, escalate privileges, or cause a denial-of-service condition. The vulnerability was introduced in version v4.15 of the Linux Kernel and has been fixed in version v5.16.19.
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. It is recommended to apply the fix by updating the Kernel package to the latest version.
Conclusion
The vulnerability in the rxrpc module of the Kernel package could lead to various security issues, including memory corruption and arbitrary code execution. To mitigate this vulnerability, it is crucial to update the Kernel package to version v5.16.19 or later. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel package is a crucial component of the Linux operating system, responsible for managing the system's core functionality and providing an interface between hardware and software.
The rxrpc module is a part of the Kernel package that handles remote procedure calls (RPC) over UDP/IP. It allows processes to execute code on remote systems as if they were local.
A race condition is a situation in which the behavior of a system depends on the relative timing of events. In this vulnerability, a race condition occurs between the start of a call timer and the destruction of the call.
The potential consequences of this vulnerability include memory corruption, use-after-free vulnerabilities, arbitrary code execution, privilege escalation, and denial-of-service conditions.
To fix this vulnerability, it is recommended to update the Linux Kernel package to version v5.16.19 or later. Regularly updating the Kernel package is also advisable to apply the latest security patches.
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