mac80211: Fix skb length check in ieee80211_scan_rx()
Summary
GSD-2021-1001054: mac80211: fix skb length check in ieee80211_scan_rx(). Affects Kernel versions >= cd418ba63f0c2f6157f35a41c9accc6ecb52590a, < d1b949c70206178b12027f66edc088d40375b5cb. 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 scanning, authentication, and data transmission. The vulnerability in question affects the skb length check in the ieee80211_scan_rx() function.
Vulnerability Detail
The vulnerability arises from a flawed skb length check in the ieee80211_scan_rx() function of the mac80211 package. This flaw could potentially allow an attacker to manipulate the length of a network packet, leading to buffer overflows or other memory corruption issues. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v5.12.13 by commit d1b949c70206178b12027f66edc088d40375b5cb. The vulnerability was introduced in version v5.10 by commit cd418ba63f0c2f6157f35a41c9accc6ecb52590a.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in mac80211's ieee80211_scan_rx() function has been fixed in Linux Kernel version v5.12.13. Users are advised to update their Linux Kernel to this version or later to mitigate the risk. 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.
The impact of this vulnerability is not yet proven. However, it could potentially lead to buffer overflows or other memory corruption issues.
To fix this vulnerability, update your Linux Kernel to version v5.12.13 or later.
There is no known workaround for this vulnerability. It is recommended to update the Linux Kernel.
You can find more information about this vulnerability in the Linux Kernel repository and the provided references link.
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