CVE-2019-5595 : What You Need to Know
Discover the impact of CVE-2019-5595, a FreeBSD kernel vulnerability exposing sensitive data. Learn about affected versions, exploitation risks, and mitigation steps.
CVE-2019-5595 pertains to a vulnerability in FreeBSD versions before 11.2-STABLE (r343782), 11.2-RELEASE-p9, 12.0-STABLE (r343781), and 12.0-RELEASE-p3. The issue involves inadequate sanitization of kernel callee-save registers before returning from system calls, potentially exposing sensitive kernel data.
Understanding CVE-2019-5595
This section provides insights into the nature and impact of the CVE-2019-5595 vulnerability.
What is CVE-2019-5595?
CVE-2019-5595 is a vulnerability in FreeBSD kernels that could lead to the exposure of certain kernel data utilized in system calls due to insufficient sanitization of callee-save registers.
The Impact of CVE-2019-5595
The vulnerability could allow attackers to access sensitive kernel data, potentially leading to unauthorized disclosure or manipulation of information.
Technical Details of CVE-2019-5595
Explore the technical aspects of the CVE-2019-5595 vulnerability.
Vulnerability Description
The vulnerability arises from the lack of proper sanitization of kernel callee-save registers before returning from system calls, creating a risk of exposing critical kernel data.
Affected Systems and Versions
- Affected Product: FreeBSD
- Vulnerable Versions: FreeBSD 11.2 before 11.2-RELEASE-p9 and 12.0 before 12.0-RELEASE-p3
Exploitation Mechanism
The vulnerability could be exploited by malicious actors to access sensitive kernel data by leveraging the inadequate sanitization of callee-save registers.
Mitigation and Prevention
Learn how to mitigate the risks associated with CVE-2019-5595.
Immediate Steps to Take
- Apply the recommended patches provided by FreeBSD promptly.
- Monitor official FreeBSD channels for updates and security advisories.
Long-Term Security Practices
- Regularly update FreeBSD systems to the latest stable releases.
- Implement strong access controls and monitoring mechanisms to detect unauthorized access.
Patching and Updates
Ensure timely installation of security patches and updates released by FreeBSD to address the CVE-2019-5595 vulnerability.