UAF bug in ax25_send_control() in Kernel
Summary
GSD-2022-1001097: ax25: fix UAF bug in ax25_send_control(). Affects Kernel versions >= 534156dd4ed768e30a43de0036f45dca7c54818f, < 01619aa347d35ac8b79751757784ec6f507a3215. 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 system to operate. It is responsible for managing hardware resources, providing system calls, and facilitating communication between software and hardware components. The ax25_send_control() function is part of the AX.25 network protocol implementation in the Kernel. AX.25 is a data link layer protocol used for packet radio communication. This vulnerability affects the Kernel and specifically the ax25_send_control() function.
Vulnerability Detail
The UAF (Use-After-Free) bug in ax25_send_control() allows an attacker to exploit a memory corruption issue. By manipulating certain parameters, an attacker can trigger the use of freed memory, leading to a potential crash or arbitrary code execution. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v5.17.2.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.17.2 or later. This can be done by downloading the updated Kernel source code from the official Git repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compiling it according to the provided instructions.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The UAF bug in ax25_send_control() in the Kernel is a potential security vulnerability that can be mitigated by updating to Linux Kernel version v5.17.2 or later. It is important to stay updated with the latest security patches to ensure the integrity and security of the system. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven. However, if successfully exploited, it could lead to a crash or arbitrary code execution.
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 the Vulert Playground will provide real-time alerts for open-source vulnerabilities.
Yes, a patch is available in Linux Kernel version v5.17.2. It is recommended to update to this version or later to fix the vulnerability.
The remote exploitability of this vulnerability has not been determined yet. Further analysis is required to assess the potential for remote exploitation.
You can find more information about this vulnerability in the GSD-2022-1001097.json file available in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1001xxx/GSD-2022-1001097.json).
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