mld: Fix Panic in mld_newpack() - Kernel
Summary
GSD-2021-1000581: mld: fix panic in mld_newpack(). Affects Kernel versions >= 72e09ad107e78d69ff4d3b97a69f0aad2b77280f, < beb39adb150f8f3b516ddf7c39835a9788704d23. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and ensures the stability and security of the system. The mld module in the Kernel is responsible for handling Multicast Listener Discovery (MLD) packets, which are used for IPv6 multicast group management. MLD allows hosts to join or leave multicast groups and receive multicast traffic. However, a vulnerability has been discovered in the mld_newpack() function, which can lead to a panic in the system.
Vulnerability Detail
The vulnerability in the mld_newpack() function within the Kernel's mld module can result in a system panic. When processing certain MLD packets, the function fails to handle them correctly, leading to an unexpected state that triggers a panic. This vulnerability can be exploited by an attacker sending specially crafted MLD packets to a vulnerable system, causing it to crash and potentially leading to a denial-of-service (DoS) 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 mld_newpack() function in the Kernel's mld module has a vulnerability that can lead to a system panic. To mitigate this issue, it is crucial to update the Linux Kernel to version v5.10.42 or later. This update ensures that the mld_newpack() function correctly handles MLD packets, preventing potential crashes and denial-of-service conditions. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is a potential denial-of-service (DoS) condition, as an attacker can send specially crafted MLD packets to crash the system.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will alert you if the vulnerability is present.
No, there is currently no known exploit for this vulnerability. However, it is still important to update the Kernel to prevent any potential attacks.
Yes, this vulnerability can be remotely exploited by an attacker sending specially crafted MLD packets to a vulnerable system over the network.
The only mitigation for this vulnerability is to update the Linux Kernel to the fixed version, as mentioned in the 'how_to_fix' section.
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