mptcp: Fix sk_forward_memory corruption on retransmission in Kernel
Summary
GSD-2021-1000794: mptcp: fix sk_forward_memory corruption on retransmission. Affects Kernel versions >= 64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25, < b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that provides essential services and functions to enable the execution of software applications. It acts as an intermediary between the hardware and software layers, managing system resources and facilitating communication between different components. The vulnerability in question affects the Kernel's implementation of the Multipath TCP (MPTCP) protocol. MPTCP is an extension to TCP that allows for the simultaneous use of multiple network paths, improving performance and reliability. However, a flaw in the MPTCP implementation can lead to sk_forward_memory corruption during retransmission.
Vulnerability Detail
The vulnerability arises from a specific scenario in which sk_forward_memory corruption occurs during retransmission in the MPTCP implementation. This corruption can potentially be exploited by an attacker to execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in version v5.12 of the Linux Kernel by commit 64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25 and has been fixed in version v5.12.10 by commit b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3.
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
In conclusion, the vulnerability in the Kernel's MPTCP implementation can lead to sk_forward_memory corruption during retransmission. While the impact and attack plausibility have not been proven, it is crucial to update the Kernel to version v5.12.10 or later to mitigate any potential risks. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is currently unknown, as the attack plausibility has not been proven. However, if successfully exploited, it could lead to arbitrary code execution or a denial-of-service condition.
You can use the Vulert Playground (https://vulert.com/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 are currently no known exploits for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
While there is no specific workaround mentioned for this vulnerability, it is generally recommended to follow security best practices, such as implementing network segmentation, using firewalls, and regularly monitoring system logs for any suspicious activity.
You can find more information about this vulnerability, including the specific commits that introduced and fixed it, in the GSD-2021-1000794 JSON file available on the GitHub repository of the Cloud Security Alliance's GSD Database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000794.json).
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