Vulnerability in Linux Kernel: net: do not keep the dst cache when uncloning an skb dst and its metadata
Summary
GSD-2022-1000287: net: do not keep the dst cache when uncloning an skb dst and its metadata. Affects Kernel versions >= d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8, < cbb43514c830cdf0f021ea74e7375a29baf80f8f. No fix is published. How to fix ↓
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Background
The Linux Kernel is a critical component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software components. It provides essential functionalities such as process management, memory management, and device drivers. The vulnerability in question affects the networking subsystem of the Linux Kernel, specifically the handling of destination (dst) cache when uncloning a socket buffer (skb) dst and its metadata.
Vulnerability Detail
The vulnerability arises from a flaw in the Linux Kernel's networking subsystem. When uncloning an skb dst and its metadata, the dst cache is not properly cleared, leading to potential security vulnerabilities. Although the impact and attack plausibility have not been proven, this vulnerability could potentially be exploited by malicious actors to gain unauthorized access, execute arbitrary code, or cause denial-of-service conditions. The vulnerability was introduced in Linux Kernel version v4.6 and has been fixed in version v4.9.302 by commit cbb43514c830cdf0f021ea74e7375a29baf80f8f.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
The vulnerability in the Linux Kernel's networking subsystem could potentially lead to unauthorized access, arbitrary code execution, or denial-of-service attacks. It is crucial to update the Linux Kernel to version v4.9.302 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it could potentially allow unauthorized access, arbitrary code execution, or denial-of-service attacks.
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 Vulert will analyze it in real-time.
Yes, a patch has been released in Linux Kernel version v4.9.302. It is recommended to update to this version or a later one to fix the vulnerability.
The recommended approach is to update the Linux Kernel to the fixed version. However, if updating is not immediately feasible, you can consider implementing additional security measures such as network segmentation, access controls, and intrusion detection systems to reduce the risk.
For more information about this vulnerability, you can refer to the vulnerability details in the GSD Database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1000xxx/GSD-2022-1000287.json).
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