CVE-2019-19519 : Exploit Details and Defense Strategies

OpenBSD 6.6 su -L option allows local users to attain any login class due to a logic flaw in su/su.c.

Understanding CVE-2019-19519

The vulnerability in OpenBSD 6.6 enables local users to exploit the su -L option to gain unauthorized access.

What is CVE-2019-19519?

The su -L option in OpenBSD 6.6 allows local users to attain any login class, typically excluding root, due to a logic flaw present in the main function of su/su.c.

The Impact of CVE-2019-19519

Local users can achieve any login class, usually excluding root, through the su -L option.

Technical Details of CVE-2019-19519

The technical aspects of the vulnerability in OpenBSD 6.6.

Vulnerability Description

Logic flaw in the main function of su/su.c allows local users to gain unauthorized login class.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Version: n/a

Exploitation Mechanism

Local users exploit the su -L option to attain unauthorized login class, typically excluding root.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2019-19519 vulnerability.

Immediate Steps to Take

Monitor for unauthorized access attempts.
Limit user privileges to minimize potential impact.
Apply patches or updates from the vendor.

Long-Term Security Practices

Regularly review and update access control policies.
Conduct security training for users on best practices.

Patching and Updates

Apply the latest patches and updates provided by OpenBSD to address the vulnerability.