Vulnerability in Kernel: cfg80211: call cfg80211_leave_ocb when switching away from OCB
Summary
GSD-2021-1001110: cfg80211: call cfg80211_leave_ocb when switching away from OCB. Affects Kernel versions < 24e2441b102db48bf8eec1f6b789db49b5e86adb. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The cfg80211 module within the Kernel is responsible for handling wireless network configuration and management. It provides APIs for wireless drivers and supports various wireless protocols.
However, a vulnerability has been identified in the cfg80211 module that can be exploited when switching away from OCB (Outside Context of a BSS) mode. OCB is a wireless mode that allows devices to communicate directly with each other without the need for an access point. The vulnerability arises from a failure to call the cfg80211_leave_ocb function when switching away from OCB mode, potentially leaving the system in an inconsistent state and leading to security issues.
Vulnerability Detail
The vulnerability in the cfg80211 module occurs when switching away from OCB mode without properly invoking the cfg80211_leave_ocb function. This oversight can result in a variety of security issues, although the exact impact and attack vectors have not been proven. An attacker may be able to exploit this vulnerability to gain unauthorized access, execute arbitrary code, or disrupt wireless network functionality. It is crucial to address this vulnerability promptly to mitigate potential risks and maintain the security of the system.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in the cfg80211 module of the Kernel, which arises when switching away from OCB mode without invoking the cfg80211_leave_ocb function, can lead to potential security risks. To mitigate these risks, it is crucial to update the Linux Kernel to version v4.19.196 or later, which includes the necessary fix. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The cfg80211 module is a component of the Linux Kernel that handles wireless network configuration and management. It provides APIs for wireless drivers and supports various wireless protocols.
OCB (Outside Context of a BSS) mode is a wireless mode that allows devices to communicate directly with each other without the need for an access point.
The exact risks depend on the specific attack vectors that may be discovered in the future. However, potential risks include unauthorized access, execution of arbitrary code, and disruption of wireless network functionality.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.19.196 or later. This update includes the necessary fix for the cfg80211 module.
No specific workaround has been provided for this vulnerability. It is essential to update the Kernel to the patched version to address the issue effectively.
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