mac80211: Use-after-free in CCMP/GCMP RX
Summary
UVI-2021-1001500: mac80211: fix use-after-free in CCMP/GCMP RX. Affects Kernel versions >= 608b0a2ae928a74a2f89e02227339dd79cdb63cf, < 447d001b875d0e7f211c4ba004916028da994258. 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 as UVI-2021-1001500 is a use-after-free issue in the CCMP/GCMP RX functionality of the mac80211 package. This vulnerability allows an attacker to exploit a race condition, leading to a use-after-free scenario. By sending specially crafted network packets, 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 v4.4.271 of the Linux Kernel and is fixed in version v4.4.286.
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 apply the provided fix by updating the Linux Kernel to the patched version.
Conclusion
The use-after-free vulnerability in the mac80211 package of the Linux Kernel can be exploited by an attacker to execute arbitrary code or crash the system. To mitigate this vulnerability, it is recommended to update the Linux Kernel to version v4.4.286 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 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. This can lead to various security issues, including arbitrary code execution or system crashes.
An attacker can exploit this vulnerability by sending specially crafted network packets, triggering a race condition and leading to a use-after-free scenario.
The potential consequences of this vulnerability include arbitrary code execution or system crashes, which can result in a compromised system or denial of service.
No, there is no known workaround for this vulnerability. It is crucial to update the Linux Kernel to the patched version.
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