af_netlink: Fix shift out of bounds in group mask calculation in Kernel
Summary
GSD-2022-1002238: af_netlink: Fix shift out of bounds in group mask calculation. Affects Kernel versions >= f7fa9b10edbb9391bdd4ec8e8b3d621d0664b198, < 41249fff507387c3323b198d0052faed08b14de4. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that provides core services for managing system resources and facilitating communication between hardware and software. It is responsible for tasks such as memory management, process scheduling, and device drivers. The af_netlink module is a part of the Kernel's networking subsystem and is used for communication between user-space processes and the kernel. It allows processes to send and receive messages over Netlink sockets.
The vulnerability in af_netlink arises from a shift out of bounds in the group mask calculation. This can lead to unexpected behavior and potential security risks. The vulnerability was introduced in version v2.6.14 of the Linux Kernel and has been fixed in version v5.4.189.
Vulnerability Detail
The vulnerability in af_netlink is caused by a shift out of bounds in the group mask calculation. This means that when calculating the group mask, the shift operation exceeds the valid range, resulting in undefined behavior. An attacker could potentially exploit this vulnerability to manipulate the group mask and gain unauthorized access or perform other malicious actions.
The impact and attack plausibility of this vulnerability have not been proven yet, but it is important to address it to ensure the security and stability of the system.
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. The recommended approach is to update the Linux Kernel to the fixed version.
Conclusion
The af_netlink vulnerability in the Linux Kernel can be addressed by updating to version v5.4.189 or later. This will ensure that the shift out of bounds issue in the group mask calculation is fixed, protecting the system from potential exploits. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The af_netlink module is a part of the Linux Kernel's networking subsystem. It allows user-space processes to communicate with the kernel by sending and receiving messages over Netlink sockets.
The exact exploitation method for this vulnerability is not known. However, an attacker could potentially manipulate the group mask calculation to gain unauthorized access or perform other malicious actions.
The impact of this vulnerability is not yet proven. However, if successfully exploited, it could lead to unauthorized access, privilege escalation, or other security breaches.
Yes, this vulnerability has been fixed in Linux Kernel version v5.4.189. It is recommended to update the Kernel to this version or later to ensure the system is protected.
You can find more information about this vulnerability in the Open Source Vulnerability database maintained by the Cloud Security Alliance. The vulnerability ID is GSD-2022-1002238.
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