Vulnerability in Kernel: tunnels: do not assume mac header is set in skb_tunnel_check_pmtu()
Summary
GSD-2022-1004223: tunnels: do not assume mac header is set in skb_tunnel_check_pmtu(). Affects Kernel versions >= 4cb47a8644cc9eb8ec81190a50e79e6530d0297f, < 32dcf62efa0003f92a976aea0c57f118e689de8b. 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 vulnerability in question affects the Kernel's handling of tunnels and specifically the function skb_tunnel_check_pmtu().
Vulnerability Detail
The vulnerability arises from an incorrect assumption made in the skb_tunnel_check_pmtu() function within the Kernel. It assumes that the mac header is always set, which may not be the case in certain scenarios. This can lead to potential security vulnerabilities, although the exact impact and plausibility of an attack have not been proven. The vulnerability was introduced in version v5.9 of the Linux Kernel and has been fixed in version v5.18.10.
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
In conclusion, the vulnerability in the Kernel's skb_tunnel_check_pmtu() function can potentially introduce security vulnerabilities in affected versions. It is recommended to update the Kernel to version v5.18.10 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it has the potential to introduce security vulnerabilities in the affected Kernel versions.
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 Vulert will analyze it in real-time.
There is no known exploit for this vulnerability at the moment. However, it is always recommended to apply security patches and updates to mitigate potential risks.
No, only versions from v5.9 to v5.18.9 of the Linux Kernel are affected. The vulnerability has been fixed in version v5.18.10.
You can find more information about this vulnerability in the official GitHub repository of the Cloud Security Alliance's GSD Database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1004xxx/GSD-2022-1004223.json).
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