Vulnerability in Kernel: VLAN Traffic Leaks in mt7530
Summary
UVI-2021-1000551: net: dsa: mt7530: fix VLAN traffic leaks. Affects Kernel versions >= 83163f7dca5684816d01c8ccf4857aa74801e7b7, < 82ae35b6c14feae5f216913d5b433e143c756d4e. 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 functionality and acts as a bridge between hardware and software. It manages system resources, facilitates communication between different software components, and enables the execution of user programs. The mt7530 driver is responsible for handling network traffic on certain DSA (Distributed Switch Architecture) switches. DSA switches are commonly used in network infrastructure to enable the creation of virtual LANs (VLANs) and manage network traffic flow.
Vulnerability Detail
The mt7530 driver in the Kernel is susceptible to VLAN traffic leaks. This vulnerability allows an attacker to intercept and access network traffic from different VLANs, potentially leading to unauthorized access, data leakage, or other malicious activities. The issue arises due to improper handling of VLAN tags, which can result in the incorrect forwarding of packets between VLANs. This vulnerability was introduced in Kernel version v4.16 and has been fixed in version v5.12.9.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, network administrators can implement VLAN isolation techniques to minimize the impact of this vulnerability. This involves configuring the network switches to prevent the forwarding of packets between VLANs, effectively isolating each VLAN from others. However, this workaround may not provide complete protection and should be considered a temporary measure until the Kernel is updated.
Conclusion
The vulnerability in the Kernel's mt7530 driver poses a risk of VLAN traffic leaks, potentially enabling unauthorized access and data leakage. It is crucial to update the Kernel to version v5.12.9 or later to mitigate this vulnerability. Network administrators can also implement VLAN isolation techniques as a temporary workaround. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability allows an attacker to intercept and access network traffic from different VLANs, potentially leading to unauthorized access, data leakage, or other malicious activities.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it in real-time.
Yes, the vulnerability has been fixed in Kernel version v5.12.9. It is recommended to update your Kernel to this version or later to mitigate the risk.
A temporary workaround is to implement VLAN isolation techniques on network switches to prevent the forwarding of packets between VLANs. However, this workaround may not provide complete protection and should be considered a temporary measure.
You can find more information about this vulnerability in the Open Source Vulnerability database maintained by the Cloud Security Alliance. The specific vulnerability ID is UVI-2021-1000551.
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