mptcp: Fix Possible Stall on recvmsg() in Linux Kernel
Summary
GSD-2021-1002092: mptcp: fix possible stall on recvmsg(). Affects Kernel versions >= 7a6a6cbc3e592e339ad23e4e8ede9a3f6160bda8, < 1a4554e94f0deff9fc1dc5addf93fa579cc29711. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system. It provides essential functionality, such as managing system resources, handling hardware devices, and facilitating communication between software components. The MultiPath TCP (mptcp) is an extension to the TCP protocol that enables the simultaneous use of multiple network paths for a single TCP connection. This feature enhances network performance and resilience.
However, a vulnerability has been discovered in the mptcp implementation that could lead to a possible stall on the recvmsg() function. This vulnerability affects Linux Kernel versions 5.6 to 5.14.14.
Vulnerability Detail
The vulnerability arises from a flaw in the mptcp implementation, specifically in the recvmsg() function. An attacker could exploit this vulnerability to cause a stall in the function, resulting in a denial-of-service condition. The impact of this vulnerability has not been proven, but it has the potential to disrupt network communication and affect system availability.
The vulnerability was introduced in Linux Kernel version 5.6 and has been fixed in version 5.14.14 by commit 1a4554e94f0deff9fc1dc5addf93fa579cc29711.
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.
Conclusion
The mptcp vulnerability in the Linux Kernel, which could lead to a possible stall on the recvmsg() function, has been identified and fixed in version 5.14.14. It is crucial to update the kernel to the fixed version to ensure system security and stability. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability has not been proven, but it has the potential to disrupt network communication and affect system availability.
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 Vulert will analyze it for any open-source vulnerabilities, including this one.
There is no known exploit for this vulnerability at the moment. However, it is always recommended to apply security patches promptly to mitigate potential risks.
The recommended approach is to update the Linux Kernel to the fixed version. However, if updating is not immediately feasible, it is advisable to follow security best practices, such as implementing network segmentation and access controls, to minimize the potential impact of this vulnerability.
You can find more information about this vulnerability in the Open Source Vulnerability Database (OSVDB) entry at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002092.json.
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