Vulnerability in Kernel: net: mscc: ocelot: avoid overflowing the PTP timestamp FIFO
Summary
UVI-2021-1002094: net: mscc: ocelot: avoid overflowing the PTP timestamp FIFO. Affects Kernel versions >= 4e3b0468e6d7f3c38ce52320803769b49ba87930, < 3b4241817601a2f59beea471baa51763d7262232. 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 interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and ensures the stability and security of the system. The net: mscc: ocelot module within the Kernel is responsible for handling network-related operations on the Ocelot platform. This vulnerability specifically affects the PTP (Precision Time Protocol) timestamp FIFO, which is used for accurate time synchronization in network applications.
Vulnerability Detail
The vulnerability in the net: mscc: ocelot module allows for the potential overflow of the PTP timestamp FIFO. This can occur when the FIFO is not properly managed, leading to the loss of timestamp data and potential disruption of time synchronization in network applications. The impact of this vulnerability can vary depending on the specific use case, but it has the potential to cause inaccuracies in time-sensitive operations, such as network synchronization and event logging. The vulnerability was introduced in version v5.4 of the Linux Kernel and has been fixed in version v5.14.14.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Kernel is not immediately feasible, a potential workaround is to disable or limit the usage of the net: mscc: ocelot module in the affected system. This can be achieved by modifying the system configuration or disabling relevant network interfaces that rely on this module. However, it is important to note that this workaround may impact the functionality of network-related operations on the Ocelot platform.
Conclusion
The vulnerability in the net: mscc: ocelot module of the Kernel can lead to the overflow of the PTP timestamp FIFO, potentially causing disruptions in time synchronization for network applications. It is crucial to update the Linux Kernel to version v5.14.14 or later to mitigate this vulnerability. If immediate updating is not possible, disabling or limiting the usage of the affected module can serve as a temporary workaround. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the specific use case, but it has the potential to cause inaccuracies in time-sensitive operations, such as network synchronization and event logging.
You can use Vulert's 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 Vulert will analyze it in real-time to identify any open-source vulnerabilities, including this one.
Yes, a potential workaround is to disable or limit the usage of the net: mscc: ocelot module in the affected system. However, this may impact the functionality of network-related operations on the Ocelot platform.
To update the Linux Kernel, you can obtain the latest version from the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and follow the installation instructions provided. It is important to ensure compatibility with your system configuration and update any necessary dependencies.
You can find more information about this vulnerability, including the specific commits that introduced and fixed it, in the vulnerability database maintained by the Cloud Security Alliance. The source link is provided in the database_specific field of the vulnerability details.
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