CVE-2019-19227 : Vulnerability Insights and Analysis
Learn about CVE-2019-19227, a vulnerability in the Linux kernel AppleTalk subsystem before version 5.1, potentially leading to denial of service. Find mitigation steps and long-term security practices.
The Linux kernel prior to version 5.1 contains a vulnerability in the AppleTalk subsystem that can lead to a denial of service.
Understanding CVE-2019-19227
This CVE involves a potential NULL pointer dereference in the AppleTalk subsystem of the Linux kernel.
What is CVE-2019-19227?
In the Linux kernel before version 5.1, a vulnerability exists in the AppleTalk subsystem, specifically in the register_snap_client function. This flaw can result in a NULL pointer dereference, potentially leading to a denial of service in certain files within the net/appletalk directory.
The Impact of CVE-2019-19227
Exploiting this vulnerability can cause a denial of service in the aarp.c and ddp.c files within the net/appletalk directory.
Technical Details of CVE-2019-19227
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability in the AppleTalk subsystem of the Linux kernel before version 5.1 may allow a NULL pointer dereference due to the return of NULL by the register_snap_client function.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The vulnerability can be exploited by triggering the NULL pointer dereference in the register_snap_client function, leading to a denial of service in specific files.
Mitigation and Prevention
Protecting systems from CVE-2019-19227 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches provided by the Linux kernel to address the vulnerability.
- Monitor vendor advisories and apply relevant security updates.
- Implement network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly update and patch the Linux kernel to mitigate known vulnerabilities.
- Conduct security assessments and audits to identify and address weaknesses in the system.
Patching and Updates
- Refer to the Linux kernel's official website for the latest patches and updates to fix CVE-2019-19227.