CVE-2019-3819 : Exploit Details and Defense Strategies
Learn about CVE-2019-3819, a Linux kernel vulnerability in hid_debug_events_read() function allowing local privileged users to trigger an endless loop, leading to system freeze and denial of service. Find mitigation steps and patching advice here.
This CVE-2019-3819 article provides insights into a vulnerability in the Linux kernel affecting versions from v4.18 onwards.
Understanding CVE-2019-3819
What is CVE-2019-3819?
The Linux kernel vulnerability in the drivers/hid/hid-debug.c file allows a local privileged user to trigger an endless loop, leading to a system freeze and denial of service.
The Impact of CVE-2019-3819
The vulnerability has a CVSS base score of 4.2 (Medium severity) with a high impact on availability.
Technical Details of CVE-2019-3819
Vulnerability Description
The flaw in hid_debug_events_read() function can cause an endless loop when specific parameters are provided from userspace.
Affected Systems and Versions
- Product: kernel
- Vendor: The Linux Foundation
- Versions affected: from v4.18 and newer
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Local
- Privileges Required: High
- User Interaction: Required
Mitigation and Prevention
Immediate Steps to Take
- Apply security updates promptly
- Restrict access to privileged accounts
- Monitor system logs for suspicious activities
Long-Term Security Practices
- Regularly update and patch systems
- Implement the principle of least privilege
Patching and Updates
Regularly check for security advisories and apply patches as soon as they are available.