CVE-2019-15291 Explained : Impact and Mitigation
Discover the impact of CVE-2019-15291, a Linux kernel vulnerability allowing a NULL pointer dereference with malicious USB devices. Learn about affected systems, exploitation, and mitigation steps.
A problem has been identified in the Linux kernel up to version 5.2.9. The flexcop_usb_probe function in the drivers/media/usb/b2c2/flexcop-usb.c driver is vulnerable to a NULL pointer dereference when subjected to a malevolent USB device.
Understanding CVE-2019-15291
An issue was discovered in the Linux kernel through version 5.2.9, leading to a NULL pointer dereference due to a malicious USB device in the flexcop_usb_probe function.
What is CVE-2019-15291?
This CVE identifies a vulnerability in the Linux kernel that allows a NULL pointer dereference when a malicious USB device is used with the flexcop_usb_probe function.
The Impact of CVE-2019-15291
The vulnerability can be exploited by an attacker using a specially crafted USB device to trigger a NULL pointer dereference, potentially leading to a denial of service or arbitrary code execution.
Technical Details of CVE-2019-15291
The following technical details provide insight into the vulnerability and its implications.
Vulnerability Description
The flexcop_usb_probe function in the drivers/media/usb/b2c2/flexcop-usb.c driver in the Linux kernel up to version 5.2.9 is susceptible to a NULL pointer dereference when exposed to a malicious USB device.
Affected Systems and Versions
- Linux kernel versions up to 5.2.9 are impacted by this vulnerability.
Exploitation Mechanism
The vulnerability can be exploited by an attacker inserting a specially crafted USB device, triggering the NULL pointer dereference in the flexcop_usb_probe function.
Mitigation and Prevention
Protecting systems from CVE-2019-15291 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by the Linux kernel maintainers to mitigate the vulnerability.
- Monitor for any unusual USB device activity on the system.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version to ensure all security patches are applied.
- Implement strict USB device usage policies to prevent the connection of untrusted devices.
Patching and Updates
- Stay informed about security advisories and updates from Linux distributions and vendors to promptly address any new vulnerabilities.