CVE-2018-1111 Explained : Impact and Mitigation

A security weakness in DHCP packages in Red Hat Enterprise Linux 6 and 7, Fedora 28, and earlier versions allows for command injection via NetworkManager integration script.

Understanding CVE-2018-1111

This CVE involves a vulnerability in DHCP packages that can be exploited to run unauthorized commands as root on systems using NetworkManager.

What is CVE-2018-1111?

The vulnerability in DHCP packages in Red Hat Enterprise Linux 6 and 7, Fedora 28, and prior versions enables command injection when a malicious DHCP server or attacker on the local network impersonates DHCP responses.

The Impact of CVE-2018-1111

The vulnerability poses a high risk, allowing attackers to execute unauthorized commands with root privileges on affected systems.

Technical Details of CVE-2018-1111

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability allows for command injection in DHCP packages used by NetworkManager, leading to unauthorized command execution.

Affected Systems and Versions

Red Hat Enterprise Linux 6 and 7
Fedora 28

Exploitation Mechanism

The flaw can be exploited by a malicious DHCP server or attacker on the local network impersonating DHCP responses to execute unauthorized commands as root.

Mitigation and Prevention

Protecting systems from CVE-2018-1111 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by Red Hat and Fedora promptly
Implement network segmentation to limit exposure
Monitor network traffic for any suspicious DHCP activities

Long-Term Security Practices

Regularly update and patch all software and systems
Conduct security audits and penetration testing to identify vulnerabilities
Educate users on network security best practices

Patching and Updates

Red Hat and Fedora have released patches to address the vulnerability
Ensure all affected systems are updated with the latest patches