CVE-2019-19543 : Security Advisory and Response
Learn about CVE-2019-19543, a critical use-after-free flaw in the Linux kernel before version 5.1.6. Find out the impact, affected systems, exploitation details, and mitigation steps.
A use-after-free vulnerability was identified in the Linux kernel before version 5.1.6, specifically in the serial_ir_init_module() function located in drivers/media/rc/serial_ir.c.
Understanding CVE-2019-19543
This CVE involves a critical use-after-free flaw in the Linux kernel that could be exploited by attackers.
What is CVE-2019-19543?
This CVE refers to a vulnerability in the serial_ir_init_module() function within the Linux kernel before version 5.1.6. The flaw could allow an attacker to execute arbitrary code or cause a denial of service (DoS) condition.
The Impact of CVE-2019-19543
The exploitation of this vulnerability could lead to a compromised system, unauthorized access, or disruption of services running on affected devices.
Technical Details of CVE-2019-19543
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The use-after-free vulnerability in the serial_ir_init_module() function allows an attacker to manipulate memory after it has been freed, potentially leading to code execution.
Affected Systems and Versions
- The vulnerability affects Linux kernel versions before 5.1.6.
Exploitation Mechanism
- Attackers can exploit this vulnerability by crafting malicious input to trigger the use-after-free condition, leading to potential code execution.
Mitigation and Prevention
Protecting systems from CVE-2019-19543 requires immediate action and long-term security measures.
Immediate Steps to Take
- Update the Linux kernel to version 5.1.6 or later to mitigate the vulnerability.
- Monitor for any unusual system behavior that could indicate exploitation.
Long-Term Security Practices
- Regularly apply security patches and updates to ensure system resilience.
- Implement strong access controls and network segmentation to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security advisories and promptly apply patches released by the Linux kernel maintainers to address known vulnerabilities.