Vulnerability in Linux Kernel: gso: do not skip outer ip header in case of ipip and net_failover
Summary
GSD-2022-1000861: gso: do not skip outer ip header in case of ipip and net_failover. Affects Kernel versions >= cb32f511a70be8967ac9025cf49c44324ced9a39, < dac2490d9ee0b89dffc72f1172b8bbeb60eaec39. No fix is published. How to fix ↓
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Background
The Linux Kernel is a critical component of the Linux operating system, responsible for managing system resources and providing various functionalities. It serves as the bridge between hardware and software, enabling communication and coordination between different components. The vulnerability in question affects the handling of outer IP headers in the case of IP over IP (IPIP) and network failover (net_failover) scenarios.
Vulnerability Detail
The vulnerability arises from a flaw in the gso (generic segmentation offload) implementation within the Linux Kernel. Specifically, when processing packets with IPIP or net_failover encapsulation, the outer IP header is erroneously skipped. This can lead to various security issues, including potential bypass of security measures, unauthorized access, and information disclosure. The vulnerability was introduced in version v3.13 of the Linux Kernel and has been fixed in version v5.10.103.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can apply a patch or modify the affected code manually to address the issue. However, it is strongly recommended to apply the official fix by updating the Linux Kernel to the latest version.
Conclusion
In conclusion, the vulnerability in the Linux Kernel's gso implementation can lead to security issues when handling outer IP headers in IPIP and net_failover scenarios. It is crucial to update the Kernel to version v5.10.103 or later to mitigate these risks. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can potentially allow attackers to bypass security measures, gain unauthorized access, and disclose sensitive information.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert service will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the fix promptly to mitigate any potential risks.
While applying a patch or modifying the code can serve as a temporary measure, it is strongly recommended to update the Kernel to the fixed version as soon as possible.
For more details about this vulnerability, including its technical aspects and the fix, you can refer to the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and the associated commit history.
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