Vulnerability in Kernel Package: sit: do not call ipip6_dev_free() from sit_init_net()
Summary
GSD-2021-1002678: sit: do not call ipip6_dev_free() from sit_init_net(). Affects Kernel versions >= cf124db566e6b036b8bcbe8decbed740bdfac8c6, < ad0ed314d6167b212939e3839428ba0c8bb16adb. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system that provides the core functionality and interfaces for various hardware and software components. It manages system resources, facilitates communication between hardware and software, and enables the execution of user programs. The sit module within the Kernel package is responsible for handling IPv6-in-IPv4 tunneling. This vulnerability specifically affects the sit_init_net() function, which erroneously calls the ipip6_dev_free() function, leading to potential security issues.
Vulnerability Detail
The vulnerability arises from the improper invocation of the ipip6_dev_free() function within the sit_init_net() function. This can result in various security risks, although the exact impact and attack vectors have not been proven. The vulnerability was introduced in version v4.12 of the Linux Kernel and has been fixed in version v5.4.168. It is crucial to update to the fixed version to mitigate the potential risks associated with this vulnerability.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the sit module if it is not required for their specific use case. This can be achieved by modifying the Kernel configuration and rebuilding the Kernel without the sit module. However, this workaround should only be considered if the sit module is not essential for the system's functionality.
Conclusion
In conclusion, the sit: do not call ipip6_dev_free() from sit_init_net() vulnerability in the Kernel package poses potential security risks. It is crucial to update to the fixed version of the Linux Kernel (v5.4.168 or later) to mitigate these risks. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel package is a critical component of the Linux operating system that provides core functionality and interfaces for various hardware and software components.
The sit module is responsible for handling IPv6-in-IPv4 tunneling within the Kernel package.
The exact impact and attack vectors of this vulnerability have not been proven. However, it has the potential to introduce security risks.
To fix this vulnerability, it is recommended to update the Linux Kernel package to version v5.4.168 or later.
Yes, users can disable the sit module if it is not required for their specific use case.
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