Learn about CVE-2019-5612 affecting FreeBSD versions before 12.0-RELEASE-p10, 11.3-RELEASE-p3, and 11.2-RELEASE-p14. Discover the impact, technical details, and mitigation steps for this kernel driver vulnerability.
A vulnerability in the FreeBSD kernel driver for /dev/midistat allows unauthorized access to kernel memory. Attackers can exploit this flaw to manipulate races in the handler, potentially leading to security breaches.
Understanding CVE-2019-5612
This CVE affects FreeBSD versions before 12.0-RELEASE-p10, 11.3-RELEASE-p3, and 11.2-RELEASE-p14.
What is CVE-2019-5612?
Prior to specific releases in FreeBSD, a vulnerability exists in the kernel driver for /dev/midistat due to a non-thread-safe read handler. This flaw can be exploited by multi-threaded programs to access kernel memory beyond the data buffer limits.
The Impact of CVE-2019-5612
The vulnerability can result in unauthorized access to kernel memory, potentially leading to security breaches and exploitation by malicious actors.
Technical Details of CVE-2019-5612
The technical aspects of this CVE are as follows:
Vulnerability Description
The kernel driver for /dev/midistat in FreeBSD is susceptible to unauthorized access due to a non-thread-safe read handler.
Affected Systems and Versions
Exploitation Mechanism
Attackers can exploit the vulnerability by using multi-threaded programs to manipulate races in the handler, allowing unauthorized access to kernel memory.
Mitigation and Prevention
To address CVE-2019-5612, consider the following steps:
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates