UAF Vulnerability in Kernel package
Summary
GSD-2021-1002099: can: peak_pci: peak_pci_remove(): fix UAF. Affects Kernel versions >= e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd, < 0e5afdc2315b0737edcf55bede4ee1640d2d464d. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system. It provides the core functionality and acts as an interface between the hardware and software layers. The Kernel package handles various tasks, including device drivers, memory management, process scheduling, and system calls. It is widely used across different Linux distributions and versions.
Vulnerability Detail
The UAF (Use-After-Free) vulnerability in the Kernel package, specifically in the 'peak_pci_remove()' function of the 'peak_pci' module, allows an attacker to exploit a use-after-free condition. This vulnerability was introduced in version v3.4 of the Linux Kernel and was fixed in version v5.14.15. By triggering this vulnerability, an attacker could potentially execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability arises due to improper handling of resources during the removal of the 'peak_pci' module.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable or unload the 'peak_pci' module if it is not required for their system's functionality. This can be achieved by executing the following command as root or with sudo privileges:
rmmod peak_pci
However, it is important to note that this workaround may impact the functionality of any devices or applications relying on the 'peak_pci' module.
Conclusion
The UAF vulnerability in the Kernel package, specifically in the 'peak_pci_remove()' function, poses a potential security risk to systems running affected versions of the Linux Kernel. It is crucial to update to version v5.14.15 or later to mitigate this vulnerability. Users can also utilize the Vulert Playground at https://vulert.com/scanner to check if their systems are affected and receive real-time alerts for open-source vulnerabilities. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can potentially allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition on a system running an affected version of the Kernel package.
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 provide real-time alerts for open-source vulnerabilities, including this UAF vulnerability in the Kernel package.
Yes, the UAF vulnerability in the Kernel package has been fixed in version v5.14.15. It is recommended to update to this version or a later one to mitigate the vulnerability.
Yes, as a temporary workaround, you can disable or unload the 'peak_pci' module if it is not required for your system's functionality. However, this may impact the functionality of any devices or applications relying on the 'peak_pci' module.
You can obtain the updated Kernel package from the official Linux Kernel repository or through your respective Linux distribution's package manager. Make sure to update to version v5.14.15 or a later one.
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