Improvement of Audit Queue Handling in Linux Kernel
Summary
GSD-2021-1002648: audit: improve robustness of the audit queue handling. Affects Kernel versions >= 5b52330bbfe63b3305765354d6046c9f7f89c011, < 8389f50ceb854cb437fefb9330d5024ed3c7c1f5. 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 providing an interface for applications to interact with the hardware. It is widely used in various devices, including servers, desktops, and embedded systems. The audit subsystem in the Linux Kernel is responsible for recording system events for security and compliance purposes. It maintains an audit queue to store these events before they are processed. However, a vulnerability has been identified in the audit queue handling, which could potentially lead to security issues.
Vulnerability Detail
The vulnerability in the audit queue handling of the Linux Kernel could be exploited by an attacker to manipulate or disrupt the audit subsystem. This could result in the loss or alteration of important system event records, impacting the ability to monitor and investigate security incidents. The vulnerability was introduced in version v4.11 of the Linux Kernel and has been fixed in version v4.19.222. The exact impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.19.222 or later. This can be done by obtaining the updated kernel source code from the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compiling it for the target system. Alternatively, users can wait for their Linux distribution to provide an updated package containing the fixed version of the kernel.
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Workaround
There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by ensuring that their systems have appropriate security measures in place, such as access controls and monitoring solutions, to detect and respond to potential security incidents.
Conclusion
The vulnerability in the audit queue handling of the Linux Kernel could have serious implications for system security and compliance. It is crucial to update the Linux Kernel to version v4.19.222 or later to mitigate the risk. Additionally, implementing appropriate security measures and monitoring solutions can help enhance the overall security posture of the system. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability could include the loss or alteration of important system event records, affecting the ability to monitor and investigate security incidents.
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 to the playground, and it will alert you in real-time if any open-source vulnerabilities, including this one, are found.
Yes, a patch for this vulnerability is available in version v4.19.222 of the Linux Kernel. It is recommended to update to this version or a later one to fix the vulnerability.
While there is no specific workaround mentioned for this vulnerability, you can enhance the security of your system by implementing access controls, monitoring solutions, and other security measures to detect and respond to potential security incidents.
You can find more information about this vulnerability in the GSD-2021-1002648 entry of the GSD database maintained by the Cloud Security Alliance. The source of this information can be accessed on GitHub: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002648.json
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