LDAP Injection

LDAP injection is a security vulnerability that occurs when user input is not properly sanitized before being used in LDAP queries. This can allow attackers to manipulate queries, leading to unauthorized access or data manipulation.

Key Points

• LDAP injection is similar to SQL injection but targets LDAP directories.
• Attackers can exploit this vulnerability to bypass authentication, access unauthorized data, or manipulate directory information.
• Common attack vectors include authentication bypass, unauthorized data access, and data manipulation.

Detailed Explanation

What is LDAP Injection?

LDAP injection occurs when user input is not properly sanitized before being used in LDAP queries. This can allow attackers to manipulate queries, leading to unauthorized access or data manipulation.

How Does It Work?

Attackers can exploit this vulnerability by inputting malicious data that alters the LDAP query. For example, an attacker might input a username like *, which, when incorporated into an LDAP query, can result in a condition that always evaluates to true, bypassing authentication mechanisms.

Real-World Application

In corporate environments, LDAP is often used for managing user directories. An LDAP injection vulnerability could allow an attacker to gain unauthorized access to sensitive employee data or administrative functions.

Practical Example

An attacker might input a username like *, which, when incorporated into an LDAP query, can result in a condition that always evaluates to true, bypassing authentication mechanisms.

Key Takeaways

• Always sanitize and validate user inputs to prevent LDAP injection.
• Use parameterized queries or prepared statements to mitigate risks.
• Regularly audit and test LDAP queries to identify potential vulnerabilities.

Learn More

For more information on LDAP injection and how to prevent it, consider the following resources:

• OWASP Guide to LDAP Injection
• Secure Coding Practices