CVE-2019-15924 : Exploit Details and Defense Strategies
Discover the impact of CVE-2019-15924, a Linux kernel vulnerability before version 5.0.11 causing a NULL pointer dereference. Learn about affected systems, exploitation, and mitigation steps.
A problem was found in the Linux kernel version prior to 5.0.11. The function fm10k_init_module experiences a NULL pointer dereference due to an alloc_workqueue operation failure.
Understanding CVE-2019-15924
This CVE relates to a vulnerability in the Linux kernel that can lead to a NULL pointer dereference.
What is CVE-2019-15924?
This CVE describes an issue in the Linux kernel before version 5.0.11, specifically in the function fm10k_init_module in the file drivers/net/ethernet/intel/fm10k/fm10k_main.c. The vulnerability arises from the absence of an -ENOMEM error code when an alloc_workqueue operation fails.
The Impact of CVE-2019-15924
The vulnerability can be exploited to cause a NULL pointer dereference, potentially leading to a denial of service (DoS) condition or other security implications.
Technical Details of CVE-2019-15924
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The issue in the Linux kernel results in a NULL pointer dereference due to the lack of proper error handling upon a failed alloc_workqueue operation.
Affected Systems and Versions
- Affected System: Linux kernel versions prior to 5.0.11
- Affected Function: fm10k_init_module
- File Path: drivers/net/ethernet/intel/fm10k/fm10k_main.c
Exploitation Mechanism
The vulnerability can be exploited by triggering the specific conditions that lead to the failure of the alloc_workqueue operation, causing the NULL pointer dereference.
Mitigation and Prevention
Protecting systems from CVE-2019-15924 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply relevant security patches provided by the Linux kernel maintainers.
- Monitor official sources for updates and advisories related to the Linux kernel.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version to mitigate known vulnerabilities.
- Implement proper error handling mechanisms in kernel code to prevent similar NULL pointer dereference issues.
Patching and Updates
- Ensure timely installation of security patches released by the Linux kernel development team.