CVE-2019-15119 : Exploit Details and Defense Strategies

A vulnerability in cnlh nps version 0.23.2 allows local users to overwrite critical files due to incorrect file permissions.

Understanding CVE-2019-15119

This CVE identifies a security issue in the cnlh nps software version 0.23.2.

What is CVE-2019-15119?

The file permissions for /usr/local/bin/nps and/or /usr/bin/nps in lib/install/install.go within cnlh nps version 0.23.2 are set to 0777, enabling a local user to overwrite these files.

The Impact of CVE-2019-15119

The vulnerability can be exploited by a local user to manipulate critical files, potentially leading to unauthorized access or system compromise.

Technical Details of CVE-2019-15119

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue arises from the incorrect permission settings (0777) for specific files in the cnlh nps software, allowing local users to overwrite them.

Affected Systems and Versions

Product: cnlh nps
Vendor: n/a
Versions affected: 0.23.2

Exploitation Mechanism

By leveraging the excessively permissive file permissions, a local user can overwrite essential files, potentially causing system instability or unauthorized access.

Mitigation and Prevention

Protect your systems from CVE-2019-15119 by following these mitigation strategies.

Immediate Steps to Take

Monitor file permissions and restrict unnecessary write access.
Regularly audit and review file permissions to ensure proper security measures.

Long-Term Security Practices

Implement the principle of least privilege to limit user access rights.
Conduct regular security training for users to raise awareness about file security practices.

Patching and Updates

Apply patches or updates provided by the software vendor to rectify the file permission issue and enhance system security.