Vulnerability in Kernel: net: stmmac: fix tc flower deletion for VLAN priority Rx steering
Summary
GSD-2021-1002747: net: stmmac: fix tc flower deletion for VLAN priority Rx steering. Affects Kernel versions >= 0e039f5cf86ce2fcb62077a163e7ff3d7b7b7cf3, < 97cb5c82aa1dd85a39b1bd021c8b5f18af623779. 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 between hardware and software. It manages system resources, facilitates communication between different software components, and enables the execution of user programs. The stmmac driver is responsible for handling Ethernet network interfaces in the Kernel. It supports various features, including VLAN priority Rx steering, which allows for efficient traffic management based on VLAN priority tags. However, a vulnerability has been discovered in the stmmac driver that affects the deletion of tc flower rules for VLAN priority Rx steering.
Vulnerability Detail
The vulnerability in the stmmac driver for VLAN priority Rx steering deletion can potentially be exploited by an attacker to manipulate network traffic and bypass security measures. The issue arises from a flaw in the code that handles the deletion of tc flower rules for VLAN priority Rx steering. This flaw can lead to incorrect deletion of rules, resulting in unexpected behavior and potential security vulnerabilities. The impact of this vulnerability may vary depending on the specific network configuration and the presence of other security measures. It is important to note that the actual impact and attack plausibility have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable VLAN priority Rx steering or use alternative network configurations that do not rely on this feature. Disabling VLAN priority Rx steering can be achieved by modifying the network interface configuration or using appropriate network management tools. However, it is important to consider the impact of disabling this feature on network performance and functionality.
Conclusion
In conclusion, a vulnerability has been identified in the Kernel's stmmac driver that affects the deletion of tc flower rules for VLAN priority Rx steering. This vulnerability can potentially be exploited to manipulate network traffic and bypass security measures. It is crucial to update the Linux Kernel to version v5.15.11 or later to mitigate this vulnerability. Alternatively, users can consider disabling VLAN priority Rx steering or using alternative network configurations. For more information and assistance, please contact DevNack.com.
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FAQ
The impact of this vulnerability may vary depending on the specific network configuration and the presence of other security measures. It could potentially allow an attacker to manipulate network traffic and bypass security measures.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.11 or later. This ensures that the vulnerable code is replaced with the patched version.
Yes, users can disable VLAN priority Rx steering or use alternative network configurations that do not rely on this feature. However, it is important to consider the impact of disabling this feature on network performance and functionality.
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 the risk of potential exploitation.
For more information about this vulnerability, you can refer to the provided references link or reach out to info@devnack.com for further support.
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