Vulnerability in Kernel: net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link
Summary
GSD-2022-1001960: net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link. Affects Kernel versions >= fb3bbdb859891e6bc27fd1afb3a07319f82c2ee4, < 08d5e3e954537931c8da7428034808d202e98299. 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 enables the execution of processes. The stmmac module within the Kernel is responsible for handling Ethernet communication. It includes the altr_tse_pcs function, which is used when a fixed-link configuration is employed. This function has a vulnerability that can be exploited by attackers.
Vulnerability Detail
The altr_tse_pcs function in the stmmac module of the Kernel has a security flaw. This vulnerability was introduced in version v4.8 of the Kernel and was fixed in version v5.10.112. The flaw can be exploited when using a fixed-link configuration. The specific technical details of the vulnerability have not been disclosed, but it is important to note that it has the potential to impact the security and stability of systems utilizing the affected versions of the Kernel.
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 possible workaround is to disable the use of fixed-link configurations. By avoiding the use of fixed-link setups, the vulnerable code path in the altr_tse_pcs function can be bypassed. However, this workaround may not be suitable for all systems and could impact network connectivity or functionality.
Conclusion
The vulnerability in the altr_tse_pcs function of the stmmac module in the Kernel can pose a security risk for systems utilizing affected versions. It is crucial to update the Kernel to version v5.10.112 or later to address this vulnerability. If immediate updating is not feasible, disabling fixed-link configurations 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 system and its configuration. However, it has the potential to be exploited by attackers, potentially leading to unauthorized access, denial of service, or other security breaches.
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 for any known vulnerabilities, including this one.
No, only versions starting from v4.8 up to v5.10.111 are affected. The vulnerability was fixed in version v5.10.112.
There is currently no evidence of this vulnerability being actively exploited in the wild. However, it is still important to apply the necessary updates to ensure system security.
While updating the Kernel is the recommended approach, if immediate updating is not possible, you can mitigate the risk by disabling fixed-link configurations. However, this workaround may have implications for network connectivity and functionality.
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