mac80211: Use-after-free in CCMP/GCMP RX
Summary
GSD-2021-1001598: mac80211: fix use-after-free in CCMP/GCMP RX. Affects Kernel versions >= c8b3a6150dc8ac78d5fdd5fbdfc4806249ef8b2c, < 50149e0866a82cef33e680ee68dc380a5bc75d32. 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 and handling various operations related to wireless communication. This vulnerability affects the mac80211 package in the Linux Kernel.
Vulnerability Detail
The vulnerability identified in the mac80211 package is a use-after-free issue in the CCMP/GCMP RX functionality. This vulnerability allows an attacker to exploit a race condition, leading to a use-after-free scenario. By manipulating specific network packets, an attacker can trigger the use-after-free condition, potentially resulting in a system crash or arbitrary code execution. The vulnerability was introduced in version v5.4.124 of the Linux Kernel and was fixed in version v5.4.151.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
The mac80211 package in the Linux Kernel is vulnerable to a use-after-free issue in the CCMP/GCMP RX functionality. This vulnerability can be exploited by an attacker to potentially crash the system or execute arbitrary code. It is crucial to update the Linux Kernel to version v5.4.151 or later to mitigate this vulnerability. For further support on 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.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed, leading to potential crashes or arbitrary code execution.
An attacker can exploit this vulnerability by sending specially crafted network packets to the target system, triggering a race condition and causing a use-after-free scenario.
The impact of this vulnerability can range from system crashes to potential arbitrary code execution, depending on how it is exploited.
To mitigate this vulnerability, it is recommended to update the Linux Kernel to version v5.4.151 or later, which includes the necessary fix.
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