mac80211: Limit Injected VHT MCS/NSS in ieee80211_parse_tx_radiotap
Summary
UVI-2021-1001561: mac80211: limit injected vht mcs/nss in ieee80211_parse_tx_radiotap. Affects Kernel versions >= 646e76bb5daf4ca38438c69ffb72cccb605f3466, < 76538c7b4df314bb937e44c5cb1782f37d47443c. 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 communication between devices. The vulnerability in mac80211 arises from a limitation in the parsing of transmitted radiotap headers, specifically related to the injected VHT (Very High Throughput) MCS (Modulation and Coding Scheme) and NSS (Number of Spatial Streams).
Vulnerability Detail
The vulnerability allows an attacker to inject malicious VHT MCS/NSS values in the radiotap header, potentially leading to various security issues. By manipulating these values, an attacker could exploit vulnerabilities in the wireless network stack, compromise network security, or cause denial-of-service conditions. The vulnerability was introduced in version v4.7 of the Linux Kernel and has been fixed in version v4.19.209.
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 vulnerability allows for the injection of malicious VHT MCS/NSS values in the radiotap header, potentially leading to various security issues. It is crucial to update the Linux Kernel to version v4.19.209 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 radiotap header is a structure used in wireless packet capture to provide additional information about the radio signal.
VHT MCS stands for Very High Throughput Modulation and Coding Scheme. It defines the modulation and coding scheme used for transmitting data at very high speeds in Wi-Fi networks.
NSS stands for Number of Spatial Streams. It refers to the number of independent data streams transmitted simultaneously in a Wi-Fi network.
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