CVE-2021-41276 Explained : Impact and Mitigation

Tuleap is a Libre and Open Source tool for end-to-end traceability of application and system developments. In affected versions, Tuleap is vulnerable to indirect LDAP injection, potentially allowing a malicious user to manipulate user accounts.

Understanding CVE-2021-41276

In this CVE, Tuleap versions prior to Tuleap Community Edition 13.2.99.31, Tuleap Enterprise Edition 13.1-5, and Tuleap Enterprise Edition 13.2-3 are susceptible to an indirect LDAP injection vulnerability that could lead to account manipulation.

What is CVE-2021-41276?

CVE-2021-41276 is an indirect LDAP injection vulnerability in Tuleap, where improper sanitization of the search filter from the ldap_id attribute during daily synchronization can be exploited by a malicious user.

The Impact of CVE-2021-41276

The CVSS v3.1 base score for this vulnerability is 6.7, indicating a medium severity issue with high confidentiality and integrity impacts. A malicious user with site administrator or LDAP operator capabilities could suspend accounts or take over other accounts.

Technical Details of CVE-2021-41276

In-depth technical insights into the CVE.

Vulnerability Description

Improper sanitization of the search filter built from the ldap_id attribute during daily synchronization.

Affected Systems and Versions

Tuleap versions prior to 13.2.99.31, 13.1-5, and 13.2-3.

Exploitation Mechanism

A malicious user with specific capabilities can manipulate accounts via the ldap_id attribute.

Mitigation and Prevention

Measures to address the CVE.

Immediate Steps to Take

Update Tuleap to the patched versions: Community Edition 13.2.99.31, Enterprise Edition 13.1-5, or Enterprise Edition 13.2-3.
Review and restrict administrator and LDAP operator privileges.

Long-Term Security Practices

Regularly audit and monitor user account activities.
Implement least privilege access controls.

Patching and Updates

Regularly update Tuleap to the latest secure versions.