mac80211: Use-after-free in CCMP/GCMP RX
Summary
GSD-2021-1001732: mac80211: fix use-after-free in CCMP/GCMP RX. Affects Kernel versions >= bf30ca922a0c0176007e074b0acc77ed345e9990, < 27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9. No fix is published. How to fix ↓
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Background
The mac80211 package is a subsystem in the Linux Kernel that provides the implementation of the IEEE 802.11 wireless networking stack. It is responsible for managing wireless network interfaces, handling frame transmission and reception, and implementing various wireless protocols. The vulnerability identified in this package relates to a use-after-free issue in the CCMP/GCMP RX functionality.
Vulnerability Detail
The use-after-free vulnerability in mac80211's CCMP/GCMP RX functionality allows an attacker to exploit a race condition, potentially leading to a system crash or arbitrary code execution. This vulnerability was introduced in version v5.13 of the Linux Kernel and was fixed in version v5.14.10. By leveraging this vulnerability, an attacker could manipulate memory that has already been freed, leading to unpredictable behavior and potential security breaches.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is crucial to apply the provided fix by updating the Linux Kernel to the recommended version.
Conclusion
The use-after-free vulnerability in mac80211's CCMP/GCMP RX functionality poses a significant risk to systems running the affected Linux Kernel versions. It is crucial to update the Linux Kernel to version v5.14.10 or later to mitigate this vulnerability. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
mac80211 is a subsystem in the Linux Kernel that implements the IEEE 802.11 wireless networking stack.
CCMP/GCMP RX is a functionality within mac80211 that handles the reception of CCMP and GCMP encrypted frames in wireless networks.
A use-after-free vulnerability occurs when a program or system continues to reference memory after it has been freed. This can lead to unpredictable behavior and potential security vulnerabilities.
Exploiting this vulnerability could result in a system crash or allow an attacker to execute arbitrary code, potentially leading to further compromise of the system.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time monitoring and alerts for open-source vulnerabilities.
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