af_netlink: Fix shift out of bounds in group mask calculation in Kernel
Summary
GSD-2022-1002497: af_netlink: Fix shift out of bounds in group mask calculation. Affects Kernel versions >= f7fa9b10edbb9391bdd4ec8e8b3d621d0664b198, < e1c5d46f05aa23d740daae5cd3a6472145afac42. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages system resources and provides an interface for applications to interact with the hardware. It is responsible for tasks such as process management, memory management, and device drivers. The af_netlink module is a part of the Kernel's networking subsystem and provides a mechanism for communication between user-space processes and the kernel. It allows user-space processes to send and receive messages to and from the kernel using Netlink sockets. This vulnerability in the af_netlink module can lead to a shift out of bounds in the group mask calculation, potentially resulting in memory corruption or other security issues.
Vulnerability Detail
The vulnerability in the af_netlink module arises from a shift out of bounds in the group mask calculation. This can occur when processing Netlink messages with a specific group ID. An attacker could exploit this vulnerability by sending a specially crafted Netlink message to a vulnerable system, potentially leading to memory corruption or other security issues. The impact and attack plausibility of this vulnerability have not yet been proven. The vulnerability was introduced in version v2.6.14 of the Linux Kernel and is fixed in version v4.9.311.
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.
Conclusion
The af_netlink vulnerability in the Kernel can be mitigated by updating to the latest version of the Linux Kernel. It is important to regularly update the Kernel to ensure the security and stability of the system. For further support on 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 and provides a mechanism for communication between user-space processes and the kernel using Netlink sockets.
The impact of this vulnerability is not yet proven. However, it could potentially lead to memory corruption or other security issues.
An attacker can exploit this vulnerability by sending a specially crafted Netlink message to a vulnerable system.
This vulnerability was introduced in version v2.6.14 of the Linux Kernel.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.9.311 or later.
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