CVE-2018-1000134: Weak Password Requirements in UnboundID LDAP SDK

com.unboundid:unboundid-ldapsdk Updated 02 Oct 2025

Summary

13/05/2022

Disclosed on

CVE-2018-1000134

CVE

Yes i

Fix available

Critical

Severity

9.8

CVSS Score

CVE-2018-1000134: Weak Password Requirements in UnboundID LDAP SDK. Affects com.unboundid:unboundid-ldapsdk versions >= 1.1.0, < 4.0.5. Fixed in 4.0.5. How to fix ↓

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Background

The UnboundID LDAP SDK is a Java library that provides a high-level API for interacting with Lightweight Directory Access Protocol (LDAP) servers. It allows developers to perform various LDAP operations, such as searching, adding, modifying, and deleting entries in an LDAP directory. The UnboundID LDAP SDK is commonly used in Java applications that require LDAP functionality.

Vulnerability Detail

The UnboundID LDAP SDK version from commit 801111d8b5c732266a5dbd4b3bb0b6c7b94d7afb up to commit 8471904a02438c03965d21367890276bc25fa5a6 contains a vulnerability in the process function of the SimpleBindRequest class. This vulnerability arises from the failure to check for an empty password when running in synchronous mode. An attacker can exploit this vulnerability by providing a valid username and an empty password against servers that do not perform additional validation. The impact of this vulnerability is the ability to impersonate any valid user. The vulnerability has a CVSS score of 9.8 (Critical).

How To Fix

Minimum fixed version

4.0.5

This is the first release that contains the fix.

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Workaround

There is no known workaround for this vulnerability. It is necessary to update to the fixed version of the UnboundID LDAP SDK to address the issue.

Conclusion

The UnboundID LDAP SDK version from commit 801111d8b5c732266a5dbd4b3bb0b6c7b94d7afb up to commit 8471904a02438c03965d21367890276bc25fa5a6 is vulnerable to a weakness in password requirements. This vulnerability allows an attacker to impersonate any valid user by providing a valid username and an empty password. To mitigate this vulnerability, it is crucial to update to version 4.0.5 or later of the UnboundID LDAP SDK. For further support on vulnerability remediation, please contact DevNack.com.

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