Null-Pointer Dereference Vulnerability in audit_filter_rules
Summary
GSD-2021-1002107: audit: fix possible null-pointer dereference in audit_filter_rules. Affects Kernel versions >= bf361231c295d92a28ca283ea713f56e93e55796, < 4e9e46a700201b4c85081fd478c99c692a9aaa0d. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system that provides the core functionality and interfaces with hardware devices. It is responsible for managing system resources, executing processes, and facilitating communication between software and hardware. The audit_filter_rules function within the Kernel is designed to handle audit rules and filter them based on specific criteria.
Vulnerability Detail
The audit_filter_rules function in the Kernel is susceptible to a null-pointer dereference vulnerability. This vulnerability arises when the function fails to properly handle a null pointer, leading to a crash or potential code execution. An attacker could exploit this vulnerability by crafting a malicious audit rule that triggers the null-pointer dereference, potentially causing a denial-of-service (DoS) condition or enabling arbitrary code execution.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the audit functionality or restrict access to the affected system to mitigate the risk of exploitation. However, it is strongly advised to apply the official patch or update the Kernel as soon as possible.
Conclusion
The null-pointer dereference vulnerability in audit_filter_rules poses a risk of crashing the system or enabling arbitrary code execution. It is recommended to update the Linux Kernel to version v5.14.15 or later to address this vulnerability. Users can also utilize the Vulert Playground at https://vulert.com/scanner to check if their system is affected and receive real-time alerts for open-source vulnerabilities. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The null-pointer dereference vulnerability in audit_filter_rules can lead to a crash or potential code execution. An attacker could exploit this vulnerability to cause a denial-of-service (DoS) condition or execute arbitrary code.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this null-pointer dereference issue.
Yes, as a temporary workaround, you can disable the audit functionality or restrict access to the affected system. However, it is strongly recommended to apply the official patch or update the Kernel to address the vulnerability.
The official patch for this vulnerability is included in the Linux Kernel version v5.14.15. You can obtain the updated Kernel version from the official Linux Kernel repository.
There are no known instances of this vulnerability being exploited in the wild. However, it is crucial to apply the patch or update the Kernel to mitigate the risk of potential exploitation.
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