CVE-2017-8028 : Security Advisory and Response

In November 2017, CVE-2017-8028 was published, affecting Spring-LDAP versions 1.3.0 to 2.3.1. This CVE highlights a vulnerability that allows authentication with an arbitrary password under specific conditions.

Understanding CVE-2017-8028

CVE-2017-8028 pertains to a security issue in Pivotal Spring-LDAP versions 1.3.0 to 2.3.1, enabling unauthorized authentication under certain LDAP server configurations.

What is CVE-2017-8028?

This CVE involves a flaw in the LDAP BindAuthenticator when used with a specific authentication strategy, allowing authentication with any password if the username is correct due to a requirement for explicit operation by certain LDAP vendors.

The Impact of CVE-2017-8028

The vulnerability in Spring-LDAP versions 1.3.0 to 2.3.1 could lead to unauthorized access to systems and sensitive information, posing a significant security risk.

Technical Details of CVE-2017-8028

CVE-2017-8028 involves the following technical aspects:

Vulnerability Description

The issue arises when establishing a connection to LDAP servers without additional attributes bound
LDAP BindAuthenticator used with a specific authentication strategy
Allows authentication with any password if the username is correct

Affected Systems and Versions

Product: Spring-LDAP versions 1.3.0 to 2.3.1
Vendor: N/A

Exploitation Mechanism

LDAP BindAuthenticator with org.springframework.ldap.core.support.DefaultTlsDirContextAuthenticationStrategy
UserSearch configuration
Requirement of explicit operation for LDAP bind to take effect by certain LDAP vendors

Mitigation and Prevention

To address CVE-2017-8028, consider the following steps:

Immediate Steps to Take

Update to a patched version of Spring-LDAP that addresses the vulnerability
Implement strong password policies and multi-factor authentication

Long-Term Security Practices

Regularly monitor and audit LDAP authentication logs
Conduct security training for users on best practices to prevent unauthorized access

Patching and Updates

Apply security patches provided by the vendor promptly
Stay informed about security advisories and updates from relevant sources