UAF bugs in ax25 timers in Kernel
Summary
GSD-2022-1002153: ax25: Fix UAF bugs in ax25 timers. Affects Kernel versions < a83a18c4c9033fb6604c587f52a2d78857cf0ac2. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages the system's resources and facilitates communication between hardware and software. It provides essential functionality for the system's operation, including device drivers, memory management, and process scheduling. The ax25 module in the Kernel is responsible for implementing the AX.25 protocol, which is used for packet radio communication. This vulnerability affects the ax25 timers in the Kernel, which are used to handle various timing operations in the AX.25 protocol stack.
Vulnerability Detail
The UAF (Use-After-Free) bugs in ax25 timers can lead to potential security vulnerabilities. Use-After-Free is a type of memory corruption bug where a program continues to use a pointer after the memory it points to has been freed. In the context of ax25 timers, this vulnerability could be exploited by an attacker to manipulate the timers and potentially execute arbitrary code or cause a denial-of-service condition. 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
There is no specific workaround mentioned for this vulnerability.
Conclusion
The UAF bugs in ax25 timers in the Kernel can potentially lead to security vulnerabilities. It is recommended to update the Kernel to the latest version that includes the fix to mitigate the risk. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of these UAF bugs is not yet proven, but they have the potential to be exploited by attackers to execute arbitrary code or cause 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 to the playground, and it will analyze the dependencies and alert you if any vulnerabilities, including this one, are found.
Yes, a patch for the UAF bugs in ax25 timers has been included in the Linux Kernel version v5.4.190. Users are advised to update their Kernel to the latest version that includes the fix.
The remote exploitability of this vulnerability has not been determined yet. However, it is always recommended to keep your system up to date with the latest security patches to mitigate potential risks.
There are no known instances of this vulnerability being exploited in the wild at the time of this report. However, it is important to apply the necessary updates and patches to ensure the security of your system.
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