CVE-2018-19824 : Exploit Details and Defense Strategies
Learn about CVE-2018-19824, a vulnerability in the Linux kernel up to version 4.19.6 that allows local users to exploit a use-after-free issue in the ALSA driver by manipulating a USB Sound device.
A vulnerability in the Linux kernel up to version 4.19.6 allows a local user to exploit a use-after-free issue in the ALSA driver by manipulating a USB Sound device. This manipulation can lead to mishandling in the usb_audio_probe function found in sound/usb/card.c.
Understanding CVE-2018-19824
This CVE entry describes a vulnerability in the Linux kernel that could be exploited by a local user through a specific USB Sound device manipulation.
What is CVE-2018-19824?
In the Linux kernel up to version 4.19.6, a local user can trigger a use-after-free vulnerability in the ALSA driver by providing a manipulated USB Sound device with zero interfaces, leading to mishandling in the usb_audio_probe function.
The Impact of CVE-2018-19824
The vulnerability could allow a local user to execute arbitrary code or escalate privileges on a vulnerable system.
Technical Details of CVE-2018-19824
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability exists in the Linux kernel up to version 4.19.6, where a local user can exploit a use-after-free issue in the ALSA driver by manipulating a specific USB Sound device.
Affected Systems and Versions
- Linux kernel up to version 4.19.6
Exploitation Mechanism
- By providing a manipulated USB Sound device with zero interfaces, the user triggers mishandling in the usb_audio_probe function.
Mitigation and Prevention
Protecting systems from this vulnerability requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply relevant patches provided by the Linux kernel maintainers.
- Monitor vendor advisories for updates and apply them promptly.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version.
- Implement least privilege access controls to limit the impact of potential exploits.
Patching and Updates
- Stay informed about security updates from the Linux kernel community and apply them as soon as they are available.