tipc: skb_linearize the head skb when reassembling msgs
Summary
GSD-2021-1000690: tipc: skb_linearize the head skb when reassembling msgs. Affects Kernel versions >= 45c8b7b175ceb2d542e0fe15247377bf3bce29ec, < 5489f30bb78ff0dafb4229a69632afc2ba20765c. 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 core functionalities and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and ensures the stability and security of the system. The vulnerability in focus affects the tipc module within the Kernel. TIPC (Transparent Inter-Process Communication) is a protocol used for communication between processes running on different nodes in a cluster. It allows applications to exchange messages and data reliably and efficiently. However, a flaw in the implementation of the tipc module can lead to a security vulnerability.
Vulnerability Detail
The vulnerability arises from the failure to skb_linearize the head skb when reassembling messages in the tipc module. This can result in memory corruption or information disclosure. An attacker may exploit this vulnerability to execute arbitrary code, escalate privileges, or obtain sensitive information. The vulnerability was introduced in version v4.3 of the Linux Kernel and has been fixed in version v4.9.271.
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 vulnerability in the tipc module of the Linux Kernel can lead to memory corruption or information disclosure. It is crucial to update the Kernel to the fixed version v4.9.271 or later to mitigate this vulnerability. Regularly updating the Kernel is recommended to ensure the system is protected against the latest security threats. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can potentially allow an attacker to execute arbitrary code, escalate privileges, or obtain sensitive information.
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 is no information available regarding exploitation of this vulnerability in the wild at the moment.
The recommended mitigation is to update the Linux Kernel to the fixed version v4.9.271 or later.
You can refer to the vulnerability details in the GSD Database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000690.json) for more information.
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