Vulnerability in Linux Kernel: gso: do not skip outer ip header in case of ipip and net_failover
Summary
GSD-2022-1000914: gso: do not skip outer ip header in case of ipip and net_failover. Affects Kernel versions >= cb32f511a70be8967ac9025cf49c44324ced9a39, < e9ffbe63f6f32f526a461756309b61c395168d73. 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 between the operating system and the computer's hardware components. The vulnerability in question affects the Linux Kernel and specifically relates to the handling of outer IP headers in the presence of IP-in-IP (IPIP) and net_failover configurations.
Vulnerability Detail
The vulnerability arises from a flaw in the gso (generic segmentation offload) implementation of the Linux Kernel. In certain scenarios involving IP-in-IP encapsulation and net_failover, the outer IP header is erroneously skipped, leading to potential security issues. The impact and attack plausibility of this vulnerability have not been proven yet. However, it is crucial to address this issue to ensure the integrity and security of affected systems.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.19.232 or later. The fix for this vulnerability was implemented in commit e9ffbe63f6f32f526a461756309b61c395168d73. It is advisable to follow the official update process provided by the Linux Kernel maintainers to ensure a proper and secure update.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the Linux Kernel related to gso and the handling of outer IP headers in the presence of IPIP and net_failover configurations can potentially lead to security issues. It is crucial to update the Linux Kernel to version v4.19.232 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is a critical component of the Linux operating system, responsible for managing system resources and providing various functionalities.
gso (generic segmentation offload) is a feature in the Linux Kernel that allows network packets to be segmented and reassembled efficiently, offloading this task from the CPU to the network hardware.
IP-in-IP (IPIP) encapsulation is a technique used to encapsulate IP packets within another IP packet, allowing for tunneling of IP traffic over an existing IP network.
net_failover is a network configuration that provides failover capabilities by automatically switching to a backup network interface in case of primary interface failure.
To update the Linux Kernel, it is recommended to follow the official update process provided by the Linux Kernel maintainers. This typically involves downloading the latest kernel version and applying the necessary patches or using package management tools to update the kernel.
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