Data Races in tcp: Fix data-races around sysctl_tcp_recovery
Summary
GSD-2022-1004772: tcp: Fix data-races around sysctl_tcp_recovery. Affects Kernel versions >= 4f41b1c58a32537542f14c1150099131613a5e8a, < c7a492db1f7c37c758a66915908677bd8bc5d368. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for managing system resources, including networking capabilities. The tcp module within the kernel is responsible for handling TCP/IP connections and implementing the TCP protocol. One of the configurable parameters in the tcp module is sysctl_tcp_recovery, which controls the TCP loss recovery algorithm. This vulnerability pertains to data-races around sysctl_tcp_recovery, which can lead to unpredictable behavior and potential security issues.
Vulnerability Detail
The vulnerability arises from data-races in the tcp module related to sysctl_tcp_recovery. Data-races occur when multiple threads or processes access shared data concurrently without proper synchronization. In this case, concurrent access to sysctl_tcp_recovery can result in race conditions, leading to inconsistent or incorrect behavior. Attackers may be able to exploit these race conditions to manipulate the TCP loss recovery algorithm, potentially causing denial-of-service (DoS) conditions, information leaks, or other security vulnerabilities. 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
No specific workaround has been provided for this vulnerability.
Conclusion
The data-races vulnerability in the tcp module related to sysctl_tcp_recovery has been addressed in Linux Kernel version v4.19.254. Users should update their kernel to a version that includes the fix to mitigate the potential security risks. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is an open-source operating system kernel that forms the core of various Linux distributions. It provides essential functionality for managing system resources and enabling communication between hardware and software components.
The tcp module in the Linux Kernel is responsible for handling TCP/IP connections and implementing the TCP protocol. It manages the transmission and reception of data over TCP connections.
sysctl_tcp_recovery is a configurable parameter in the tcp module that controls the TCP loss recovery algorithm. It determines how TCP handles packet loss and retransmission during network communication.
Data-races occur when multiple threads or processes access shared data concurrently without proper synchronization. This can lead to unpredictable behavior and potential security vulnerabilities.
The potential impacts of this vulnerability include denial-of-service (DoS) conditions, information leaks, or other security vulnerabilities. However, the actual impact and attack plausibility have not been proven yet.
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