CVE-2019-19529 : Exploit Details and Defense Strategies
Learn about CVE-2019-19529, a critical use-after-free vulnerability in Linux kernel USB driver versions prior to 5.3.11. Find out the impact, affected systems, exploitation details, and mitigation steps.
A use-after-free vulnerability exists in the Linux kernel versions prior to 5.3.11, specifically in the drivers/net/can/usb/mcba_usb.c driver. This flaw can be exploited by a malicious USB device identified as CID-4d6636498c41.
Understanding CVE-2019-19529
This CVE describes a critical vulnerability in the Linux kernel that allows for a use-after-free attack vector through a specific USB driver.
What is CVE-2019-19529?
A use-after-free vulnerability in the Linux kernel's USB driver can be abused by a malicious USB device to potentially execute arbitrary code or crash the system.
The Impact of CVE-2019-19529
This vulnerability could lead to a security breach, system compromise, or denial of service if exploited by an attacker. It poses a significant risk to systems running affected Linux kernel versions.
Technical Details of CVE-2019-19529
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The use-after-free bug in the drivers/net/can/usb/mcba_usb.c driver of Linux kernels before 5.3.11 can be triggered by a malicious USB device, allowing for potential exploitation.
Affected Systems and Versions
- Vulnerable: Linux kernel versions prior to 5.3.11
- Driver: drivers/net/can/usb/mcba_usb.c
Exploitation Mechanism
The vulnerability can be exploited by a specially crafted USB device, identified as CID-4d6636498c41, to manipulate memory allocation and potentially execute malicious code.
Mitigation and Prevention
Protecting systems from CVE-2019-19529 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Update to Linux kernel version 5.3.11 or later to mitigate the vulnerability.
- Monitor USB device connections for any suspicious activity.
Long-Term Security Practices
- Regularly update the Linux kernel and system components to patch known vulnerabilities.
- Implement device control policies to restrict USB device access.
Patching and Updates
- Apply security patches provided by the Linux kernel maintainers promptly to address this vulnerability.