CVE-2018-6926 Explained : Impact and Mitigation

A vulnerability in the ServersController.php file of MISP version 2.4.87 allowed site administrators to inject arbitrary operating system commands on certain Red Hat Enterprise Linux and CentOS systems.

Understanding CVE-2018-6926

This CVE describes a security issue in MISP version 2.4.87 that could be exploited by site administrators to execute arbitrary OS commands.

What is CVE-2018-6926?

The vulnerability in the ServersController.php file of MISP version 2.4.87 enabled site administrators to override a specific path variable on Red Hat Enterprise Linux and CentOS systems, leading to the injection of arbitrary OS commands.

The Impact of CVE-2018-6926

The impact of this vulnerability was limited to site administrators who had access to the setting, as it was only accessible to them.

Technical Details of CVE-2018-6926

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability allowed site administrators to inject arbitrary OS commands by overriding a specific path variable on certain systems.

Affected Systems and Versions

MISP version 2.4.87
Red Hat Enterprise Linux and CentOS systems with the rh_shell_fix feature enabled

Exploitation Mechanism

Site administrators could exploit this vulnerability by manipulating the path variable, enabling them to inject arbitrary OS commands.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial.

Immediate Steps to Take

Disable the vulnerable feature or setting in MISP version 2.4.87
Regularly monitor and audit administrator actions

Long-Term Security Practices

Implement the principle of least privilege for administrator accounts
Conduct regular security training for administrators

Patching and Updates

Apply patches or updates provided by MISP to address this vulnerability