CVE-2018-1043 : Security Advisory and Response

Moodle 3.x allows attackers to bypass the blocked host list setting by using multiple A record hostnames.

Understanding CVE-2018-1043

This CVE involves an insufficient access control issue in Moodle 3.x that enables bypassing of the blocked host list setting.

What is CVE-2018-1043?

In Moodle 3.x, attackers can exploit the vulnerability to circumvent the blocked host list by leveraging multiple A record hostnames.

The Impact of CVE-2018-1043

This vulnerability could lead to unauthorized access and potential security breaches within Moodle 3.x instances.

Technical Details of CVE-2018-1043

The technical aspects of the CVE-2018-1043 vulnerability are as follows:

Vulnerability Description

The setting for the blocked hosts list in Moodle 3.x can be bypassed by utilizing multiple A record hostnames.

Affected Systems and Versions

Affected Product: Moodle 3.x
Affected Version: Moodle 3.x

Exploitation Mechanism

Attackers can exploit this vulnerability by using multiple A record hostnames to evade the blocked host list setting in Moodle 3.x.

Mitigation and Prevention

To address CVE-2018-1043, consider the following mitigation strategies:

Immediate Steps to Take

Update Moodle 3.x to the latest version that includes a patch for this vulnerability.
Review and adjust the blocked host list settings to enhance security.

Long-Term Security Practices

Regularly monitor and audit the host access controls within Moodle installations.
Educate users on best practices for maintaining secure configurations.

Patching and Updates

Apply security patches and updates promptly to ensure protection against known vulnerabilities.