Improvement of Audit Queue Handling in Linux Kernel
Summary
GSD-2021-1002691: audit: improve robustness of the audit queue handling. Affects Kernel versions >= 5b52330bbfe63b3305765354d6046c9f7f89c011, < 4cc6badff97f74d0fce65f9784b5df3b64e4250b. No fix is published. How to fix ↓
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Background
The Linux Kernel is a critical component of the Linux operating system that provides core functionalities and manages system resources. It acts as an interface between the hardware and software layers, enabling applications to communicate with the underlying hardware. The audit subsystem in the Linux Kernel is responsible for recording system events for security auditing purposes. It helps track and monitor various activities on the system, such as file access, process creation, and network connections. However, a vulnerability has been identified in the audit queue handling mechanism, which could potentially impact the security and reliability of the system.
Vulnerability Detail
The vulnerability in the audit queue handling mechanism of the Linux Kernel could be exploited by an attacker to disrupt the normal functioning of the audit subsystem. This could lead to the loss or manipulation of critical audit logs, compromising the integrity and traceability of system activities. The vulnerability was introduced in version v4.11 of the Linux Kernel and has been fixed in version v5.10.88. 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.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the audit queue handling mechanism of the Linux Kernel could pose a risk to the integrity and traceability of system activities. It is crucial to update the Linux Kernel to version v5.10.88 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The vulnerability could potentially result in the loss or manipulation of critical audit logs, compromising the integrity and traceability of system activities.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.
Yes, a patch has been released in version v5.10.88 of the Linux Kernel to fix this vulnerability. It is recommended to update to this version or later.
Updating the Linux Kernel to the fixed version is the recommended approach to mitigate the risk associated with this vulnerability. However, if updating is not feasible, implementing additional security measures, such as strict access controls and monitoring, can help reduce the potential impact.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002691.json) for more information about this vulnerability.
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