netlabel: Out-of-Bounds Memory Access in Linux Kernel
Summary
GSD-2022-1002196: netlabel: fix out-of-bounds memory accesses. Affects Kernel versions >= 446fda4f26822b2d42ab3396aafcedf38a9ff2b6, < 5578de4834fe0f2a34fedc7374be691443396d1f. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source monolithic Unix-like computer operating system kernel. It provides essential services for the functioning of the operating system, including managing the system's resources and facilitating communication between hardware and software components. The netlabel subsystem in the Linux Kernel is responsible for implementing network labeling, which allows the classification of network packets based on security attributes. However, a vulnerability has been discovered in the netlabel subsystem that can lead to out-of-bounds memory accesses.
Vulnerability Detail
The netlabel vulnerability in the Linux Kernel arises from out-of-bounds memory accesses. This vulnerability can be exploited by an attacker to corrupt memory, potentially leading to various security issues such as privilege escalation, information disclosure, or denial of service. The vulnerability was introduced in version v2.6.19 of the Linux Kernel and has been fixed in version v5.0. The specific commit that addresses this vulnerability is 5578de4834fe0f2a34fedc7374be691443396d1f. Further technical details and references can be found in the provided source link.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The netlabel vulnerability in the Linux Kernel can lead to out-of-bounds memory accesses, potentially resulting in various security issues. It is recommended to update the Linux Kernel to version v5.0 or later to address this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The netlabel vulnerability can potentially allow an attacker to corrupt memory and exploit it for various malicious purposes, including privilege escalation, information disclosure, or denial of service.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your Linux Kernel version is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will provide real-time alerts for open-source vulnerabilities, including this netlabel vulnerability.
No specific workaround has been provided for this vulnerability. It is recommended to update the Linux Kernel to the fixed version v5.0 or later.
The netlabel vulnerability can potentially be exploited remotely if an attacker can send specially crafted network packets to the affected system.
There are no known instances of this vulnerability being exploited in the wild at the time of this report. However, it is crucial to apply the necessary updates to mitigate the risk.
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