net: ll_temac: Fix TX BD buffer overwrite in Kernel
Summary
GSD-2021-1001004: net: ll_temac: Fix TX BD buffer overwrite. Affects Kernel versions >= 84823ff80f7403752b59e00bb198724100dc611c, < cfe403f209b11fad123a882100f0822a52a7630f. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. The ll_temac module is a driver for the Xilinx TEMAC Ethernet MAC, which provides Ethernet connectivity for Xilinx FPGA-based systems. This vulnerability affects the TX BD (Transmit Buffer Descriptor) buffer in the ll_temac module, potentially leading to buffer overwrites.
Vulnerability Detail
The vulnerability in the ll_temac module allows for a buffer overwrite in the TX BD buffer. An attacker could exploit this issue to overwrite critical data in the buffer, potentially leading to a denial-of-service condition or arbitrary code execution. The vulnerability was introduced in version v5.6 of the Linux Kernel and was fixed in version v5.10.46. The specific commit that addressed this vulnerability is cfe403f209b11fad123a882100f0822a52a7630f.
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 ll_temac module in the Linux Kernel is vulnerable to a TX BD buffer overwrite, which could result in a denial-of-service condition or arbitrary code execution. It is crucial to update the Kernel to version v5.10.46 or later to address this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability could potentially lead to a denial-of-service condition 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 manifest file (e.g., package-lock.json) and the playground will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there are no known exploits for this vulnerability. However, it is important to apply the recommended fix to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if the affected system is accessible over the network.
The recommended solution is to update the Linux Kernel to the fixed version. However, if updating the Kernel is not feasible, you can consider implementing additional network security measures to mitigate the risk of exploitation.
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