CVE-2019-3831 Explained : Impact and Mitigation

A security flaw in vdsm versions 4.19 to 4.30.3 and 4.30.5 to 4.30.8 allows unauthorized commands with root privileges.

Understanding CVE-2019-3831

This CVE involves a vulnerability in the vdsm software that could lead to the execution of unauthorized commands with elevated privileges.

What is CVE-2019-3831?

CVE-2019-3831 is a security flaw found in vdsm versions 4.19 through 4.30.3 and 4.30.5 through 4.30.8. It resides in the systemd_run function accessible to the vdsm system user, enabling the execution of unauthorized commands with root privileges.

The Impact of CVE-2019-3831

The vulnerability has a CVSS base score of 6.4, indicating a medium severity issue with high impacts on confidentiality, integrity, and availability. The attack complexity is high, requiring local access and elevated privileges.

Technical Details of CVE-2019-3831

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability in vdsm allows the vdsm system user to run unauthorized commands with root privileges, posing a significant security risk.

Affected Systems and Versions

Affected Versions: 4.19 to 4.30.3, 4.30.5 to 4.30.8
Product: vdsm
Vendor: [UNKNOWN]

Exploitation Mechanism

The systemd_run function in the affected vdsm versions can be exploited by the system user to execute arbitrary commands as root, compromising system security.

Mitigation and Prevention

Protect your systems from CVE-2019-3831 with the following steps:

Immediate Steps to Take

Update vdsm to a non-vulnerable version.
Monitor system logs for any suspicious activities.
Restrict access to vulnerable services.

Long-Term Security Practices

Implement the principle of least privilege for user access.
Regularly audit and update system configurations.
Conduct security training for system users to prevent unauthorized actions.

Patching and Updates

Apply patches provided by the vendor to fix the vulnerability.
Stay informed about security updates and best practices to enhance system security.