Locking Issues with Loops over idev->addr_list in ipv6
Summary
GSD-2022-1003792: ipv6: fix locking issues with loops over idev->addr_list. Affects Kernel versions < 4460066eb2480b9e203c73755e12e2efc820a27e. No fix is published. How to fix ↓
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Background
The Linux Kernel is an open-source monolithic Unix-like computer operating system kernel. It provides the essential services for the operating system and allows multiple processes to share hardware resources. The ipv6 module in the Linux Kernel handles the implementation of the Internet Protocol version 6 (IPv6) networking protocol. IPv6 is the successor to IPv4 and is designed to address the exhaustion of IPv4 addresses and provide improved security and network management capabilities. The idev->addr_list structure in the ipv6 module maintains a list of addresses associated with a network interface.
Vulnerability Detail
The vulnerability identified as GSD-2022-1003792 in the Linux Kernel's ipv6 module is related to locking issues with loops over idev->addr_list. The specific details of the vulnerability have not been disclosed, but it is mentioned that the issue has been fixed in Linux Kernel version v5.4.198 by commit 4460066eb2480b9e203c73755e12e2efc820a27e. The impact and attack plausibility of the vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the Linux Kernel's ipv6 module related to locking issues with loops over idev->addr_list has been identified and fixed in Linux Kernel version v5.4.198. It is recommended to update the kernel to the fixed version to ensure the security and stability of the system. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The impact of this vulnerability is currently unknown as the actual attack plausibility has not been proven.
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 Playground will analyze it for any open-source vulnerabilities, including this one.
No known exploit has been disclosed for this vulnerability at the moment.
The recommended approach to mitigate the risk is to update the Linux Kernel to the fixed version. However, if updating is not feasible, you can consider implementing additional security measures such as network segmentation, access controls, and monitoring to reduce the potential impact of the vulnerability.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003792.json) for more information about this vulnerability.
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