CVE-2018-12421 Explained : Impact and Mitigation

LTB (LDAP Tool Box) Self Service Password before version 1.3 allows unauthorized password changes through a crafted POST request.

Understanding CVE-2018-12421

What is CVE-2018-12421?

The vulnerability in LTB Self Service Password allows changing a user's password without knowing the previous one, exploiting a flaw in handling ldap_bind return value and PHP data type.

The Impact of CVE-2018-12421

This vulnerability enables attackers to alter user passwords without authentication, posing a significant security risk to affected systems.

Technical Details of CVE-2018-12421

Vulnerability Description

The issue arises due to mishandling of ldap_bind return value and lack of constraints on PHP data types, allowing unauthorized password changes.

Affected Systems and Versions

Product: LTB (LDAP Tool Box) Self Service Password
Version: Before 1.3

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a carefully crafted POST request to the application, bypassing the authentication requirement.

Mitigation and Prevention

Immediate Steps to Take

Upgrade to version 1.3 or newer to mitigate the vulnerability.
Monitor system logs for any suspicious password change activities.

Long-Term Security Practices

Implement strong password policies and regular password changes.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Regularly update the LTB Self Service Password application to the latest version to patch known security issues.