net: ieee802154: at86rf230: Stop leaking skb's in Kernel
Summary
GSD-2022-1000309: net: ieee802154: at86rf230: Stop leaking skb's. Affects Kernel versions < af649e5c95f56df64363bc46f6746b87819f9c0d. No fix is published. How to fix ↓
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Background
The Kernel is a critical 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 ieee802154 module within the Kernel is responsible for supporting wireless communication protocols, including the at86rf230 driver. This driver enables communication with IEEE 802.15.4 compliant devices, such as wireless sensor networks. However, a vulnerability has been identified in the at86rf230 driver that leads to the leakage of skb's (socket buffers).
Vulnerability Detail
The vulnerability in the at86rf230 driver allows for the unintended leakage of skb's, which are used for data transmission between network layers. This leakage can potentially result in information disclosure or unauthorized access to sensitive data. The issue originates from a programming error within the driver's code, which fails to properly handle skb's and release them after use. As a result, skb's accumulate in memory, leading to resource exhaustion and potential security risks. The vulnerability has been addressed in Linux Kernel version v4.14.268 by commit af649e5c95f56df64363bc46f6746b87819f9c0d.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the ieee802154 module or the at86rf230 driver if they are not required for their system's functionality. This can be achieved by modifying the Kernel configuration and rebuilding it without the affected module or driver. However, this workaround should only be considered if the module or driver is not essential for the system's operation.
Conclusion
The vulnerability in the at86rf230 driver of the Kernel can lead to the leakage of skb's, potentially resulting in information disclosure and resource exhaustion. It is crucial to update the Linux Kernel to version v4.14.268 or later to mitigate this vulnerability. Alternatively, users can disable the affected module or driver if they are not required. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can potentially lead to information disclosure or unauthorized access to sensitive data. It may also result in resource exhaustion, impacting the system's performance and stability.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) to the playground, and it will analyze the dependencies and alert you if any vulnerable versions are detected.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to apply the necessary updates or workarounds to mitigate the risk.
No, the fix for this vulnerability is implemented in the Linux Kernel version v4.14.268 or later. To address the issue, it is necessary to update the Kernel to the recommended version.
At the moment, updating the Linux Kernel to the fixed version is the recommended solution. However, you can also consider disabling the ieee802154 module or the at86rf230 driver if they are not essential for your system's operation.
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