Vulnerability in Kernel: net: do not keep the dst cache when uncloning an skb dst and its metadata
Summary
GSD-2022-1000317: net: do not keep the dst cache when uncloning an skb dst and its metadata. Affects Kernel versions >= d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8, < 040e92ea3d7d6f27c1b71d6502e35c54a0939cb7. 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 acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the security and stability of the system. The vulnerability in question affects the networking subsystem of the Kernel, specifically the handling of the destination (dst) cache when uncloning a socket buffer (skb) dst and its metadata.
Vulnerability Detail
The vulnerability arises from a flaw in the implementation of the skb dst uncloning process. When uncloning an skb dst and its associated metadata, the dst cache is not properly cleared, leading to potential security issues. An attacker could exploit this vulnerability to manipulate or corrupt the dst cache, potentially resulting in unauthorized access, information disclosure, or denial of service. The vulnerability was introduced in version v4.6 of the Linux Kernel and has been fixed in version v4.19.230.
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. The recommended approach is to apply the fix by updating the Linux Kernel to the patched version.
Conclusion
The vulnerability in the Kernel's networking subsystem, specifically related to the handling of the dst cache when uncloning an skb dst and its metadata, poses potential security risks. It is crucial to update the Linux Kernel to version v4.19.230 or later to mitigate these risks. By applying the fix, users can ensure the security and stability of their systems. For additional support and guidance, please contact DevNack.com.
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FAQ
The vulnerability could potentially allow an attacker to manipulate or corrupt the dst cache, leading to unauthorized access, information disclosure, or denial of service.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the tool will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there are no known public exploits targeting this specific vulnerability. However, it is important to apply the fix promptly to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if the affected system is exposed to untrusted network traffic. It is crucial to update the Linux Kernel to the fixed version to prevent any potential remote exploitation.
For further support and assistance in remediating this vulnerability, you can reach out to info@devnack.com. Our team of experts will be happy to assist you.
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