Vulnerability in Kernel: cfg80211: call cfg80211_leave_ocb when switching away from OCB
Summary
GSD-2021-1001140: cfg80211: call cfg80211_leave_ocb when switching away from OCB. Affects Kernel versions < a64b6a25dd9f984ed05fade603a00e2eae787d2f. 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 the system's core functions, including hardware, memory, and process management. It provides an interface between the hardware and the software, allowing applications to communicate with the underlying system. The cfg80211 module within the Kernel is responsible for handling wireless network configuration and management. It provides various functions and APIs for wireless drivers and applications to interact with the wireless subsystem. However, a vulnerability has been discovered in the cfg80211 module that can lead to potential security issues.
Vulnerability Detail
The vulnerability in the cfg80211 module arises when switching away from OCB (Outside Context of a BSS) mode. OCB mode allows devices to communicate directly with each other without the need for an access point. When switching away from OCB mode, the cfg80211_leave_ocb function should be called to properly clean up the OCB-related state. However, this function is not called in certain scenarios, leaving the system in an inconsistent state. An attacker could potentially exploit this vulnerability to gain unauthorized access, disrupt network communication, or execute arbitrary code. It is important to note that the actual impact and attack plausibility have not yet been proven.
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
In conclusion, the vulnerability in the Kernel's cfg80211 module can lead to potential security issues when switching away from OCB mode. It is crucial to update the Kernel to version v5.13 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that manages the system's core functions, including hardware, memory, and process management.
The cfg80211 module is responsible for handling wireless network configuration and management in the Kernel.
OCB (Outside Context of a BSS) mode allows devices to communicate directly with each other without the need for an access point.
The impact of this vulnerability could include unauthorized access, network disruption, or arbitrary code execution.
Yes, the vulnerability has been fixed in the Linux Kernel version v5.13.
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