mac80211: Use-after-free in CCMP/GCMP RX
Summary
GSD-2021-1001514: mac80211: fix use-after-free in CCMP/GCMP RX. Affects Kernel versions >= d0f613fe6de344dc17ba04a88921a2094c13d3fa, < 31de381aef0ab1b342f62485118dc8a19363dc78. 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 sending specially crafted packets to a vulnerable system, an attacker can trigger the use-after-free condition, potentially resulting in arbitrary code execution or a system crash. The vulnerability was introduced in version v4.9.271 of the Linux Kernel and is fixed in version v4.9.285.
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 essential to update the Linux Kernel to the fixed version to mitigate the risk of exploitation.
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 execute arbitrary code or crash the system. To mitigate the risk, it is crucial to update the Linux Kernel to version v4.9.285 or later. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
mac80211 is a subsystem in the Linux Kernel that provides the implementation of the IEEE 802.11 wireless networking stack. It manages wireless network interfaces and handles wireless communication operations.
A use-after-free vulnerability occurs when a program continues to use a memory area after it has been freed. This can lead to various security issues, including arbitrary code execution or system crashes.
An attacker can exploit this vulnerability by sending specially crafted packets to a vulnerable system. By triggering the use-after-free condition, the attacker can potentially execute arbitrary code or crash the system.
The vulnerability was introduced in version v4.9.271 of the Linux Kernel. Versions prior to v4.9.285 are affected.
Yes, the vulnerability is fixed in version v4.9.285 of the Linux Kernel. It is recommended to update to this version or later to mitigate the risk.
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