IPv6 Panic Vulnerability in Linux Kernel
Summary
GSD-2022-1001643: ipv6: fix panic when forwarding a pkt with no in6 dev. Affects Kernel versions >= ccd27f05ae7b8ebc40af5b004e94517a919aa862, < adee01bbf6cb5b3e4ed08be8ff866aac90f13836. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for managing system resources, device drivers, and network protocols. The IPv6 (Internet Protocol version 6) is a network layer protocol that enables the identification and location of devices on the internet. It is an integral part of the Linux Kernel and facilitates communication over IPv6 networks.
Vulnerability Detail
The identified vulnerability in the Linux Kernel affects the handling of IPv6 packets when forwarding them without an in6 dev (IPv6 device). This flaw can lead to a panic condition, causing the system to crash. The vulnerability was introduced in version v5.14 of the Linux Kernel and fixed in version v5.15.35. 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. However, users can mitigate the risk by ensuring that IPv6 forwarding is only performed when an in6 dev is present. This can be achieved by implementing proper network configuration and access control measures.
Conclusion
The IPv6 Panic Vulnerability in the Linux Kernel can lead to system crashes when forwarding IPv6 packets without an in6 dev. It is crucial to update the Linux Kernel to version v5.15.35 or later to mitigate this vulnerability. Users can also implement network configuration and access control measures to minimize the risk. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The vulnerability can lead to a system crash (panic) when forwarding IPv6 packets without an in6 dev. This can result in service disruptions and potential denial-of-service (DoS) scenarios.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert service will analyze it for potential vulnerabilities.
As of now, there is no known exploit for this vulnerability. However, it is important to apply the recommended fix to ensure system security.
While there is no specific workaround mentioned, you can enhance your network configuration and access control to minimize the risk of forwarding IPv6 packets without an in6 dev.
You can refer to the vulnerability details in the GSD Database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1001xxx/GSD-2022-1001643.json) for more technical information and references.
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