Data Races in ipv4 Package: Fix for sysctl_fib_multipath_hash_fields
Summary
GSD-2022-1004108: ipv4: Fix data-races around sysctl_fib_multipath_hash_fields. Affects Kernel versions >= ce5c9c20d364f156c885efed8c71fca2945db00f, < 548d6678c4a3d43667e59686665f8674b82440a3. No fix is published. How to fix ↓
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Background
The ipv4 package is a component of the Linux Kernel, which is responsible for handling Internet Protocol version 4 (IPv4) networking. It provides the necessary functionality for routing and transmitting IPv4 packets across networks. The sysctl_fib_multipath_hash_fields feature within the package allows users to configure the fields used for hashing multipath routes. However, a vulnerability has been discovered in this feature that can lead to data races.
Vulnerability Detail
The vulnerability in the ipv4 package arises from data races around the sysctl_fib_multipath_hash_fields feature. Data races occur when multiple threads or processes access shared data concurrently without proper synchronization. In this case, the vulnerability can result in inconsistent or incorrect data being accessed or modified, leading to potential security risks. 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. It is advised to apply the fix by updating the Linux Kernel to the recommended version.
Conclusion
In conclusion, the ipv4 package in the Linux Kernel is vulnerable to data races around the sysctl_fib_multipath_hash_fields feature. This vulnerability can potentially lead to security risks due to inconsistent or incorrect data access or modification. It is recommended to update the Linux Kernel to version v5.18.15 or later to fix this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven. However, data races can potentially lead to inconsistent or incorrect data being accessed or modified, which may result in security risks.
You can use tools like Vulert (https://vulert.com) to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
Yes, a patch is available for this vulnerability. It is recommended to update the Linux Kernel to version v5.18.15 or later to apply the fix.
There are no known exploits for this vulnerability at the moment. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
You can refer to the vulnerability details in the Open Source Vulnerability format provided by the Cloud Security Alliance's GSD database. The details include the commit IDs, affected versions, and references for further information.
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