CVE-2019-13057 : Vulnerability Insights and Analysis

OpenLDAP Server Vulnerability

Understanding CVE-2019-13057

A vulnerability in OpenLDAP server versions prior to 2.4.48 allows a rootDN to seek authorization as an identity from another database, impacting multi-tenant deployments.

What is CVE-2019-13057?

OpenLDAP server versions before 2.4.48 have a flaw where rootDN can request authorization as an identity from another database during a SASL bind or using a proxyAuthz control.
Uncommon configuration where server and DB administrators have different trust levels.

The Impact of CVE-2019-13057

Attackers can exploit this vulnerability to gain unauthorized access to sensitive data in multi-tenant environments.

Technical Details of CVE-2019-13057

Vulnerability in OpenLDAP Server

Vulnerability Description

OpenLDAP server fails to prevent rootDN from seeking authorization as an identity from another database during a SASL bind or proxyAuthz control.

Affected Systems and Versions

OpenLDAP versions prior to 2.4.48 are affected.

Exploitation Mechanism

Attackers can abuse the vulnerability to impersonate identities from other databases, compromising data isolation.

Mitigation and Prevention

Protecting Against CVE-2019-13057

Immediate Steps to Take

Upgrade OpenLDAP server to version 2.4.48 or later to mitigate the vulnerability.
Review and adjust server configurations to ensure proper isolation and access controls.

Long-Term Security Practices

Regularly review and update access control policies to prevent unauthorized access.
Conduct security audits to identify and address any misconfigurations that could lead to similar vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by OpenLDAP to address vulnerabilities like CVE-2019-13057.