Vulnerability in wireguard: socket: free skb in send6 when ipv6 is disabled
Summary
GSD-2022-1001437: wireguard: socket: free skb in send6 when ipv6 is disabled. Affects Kernel versions >= e7096c131e5161fa3b8e52a650d7719d2857adfd, < ebcc492f4ba14bae54b898f1016a37b4282558d1. No fix is published. How to fix ↓
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Background
WireGuard is an open-source VPN protocol that aims to provide a secure and efficient way to establish virtual private networks. It is implemented as a kernel module in the Linux Kernel. The vulnerability identified in this report affects the WireGuard module when IPv6 is disabled. This vulnerability allows an attacker to free a socket buffer (skb) in the send6 function, leading to a potential use-after-free vulnerability. This vulnerability was introduced in Linux Kernel version v5.6 and has been fixed in version v5.16.19.
Vulnerability Detail
The vulnerability in wireguard: socket: free skb in send6 when ipv6 is disabled allows an attacker to free a socket buffer (skb) in the send6 function, even when IPv6 is disabled. This can lead to a use-after-free vulnerability, potentially allowing an attacker to execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The vulnerability in wireguard: socket: free skb in send6 when ipv6 is disabled can potentially lead to a use-after-free vulnerability. It is recommended to update the Linux Kernel to version v5.16.19 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
WireGuard is an open-source VPN protocol that provides a secure and efficient way to establish virtual private networks.
The impact of this vulnerability is not yet proven, but it could potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.16.19 or later.
No specific workaround has been mentioned for this vulnerability.
Users can obtain the updated Linux Kernel from the official Linux Kernel repository.
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