CVE-2021-32651 Explained : Impact and Mitigation

OneDev, versions 4.4.1 and prior, are vulnerable to LDAP injection. Attackers can exploit LDAP external authentication to manipulate user search filters and conduct Blind LDAP Injection, potentially leaking LDAP directory information. This issue was addressed in version 4.4.2.

Understanding CVE-2021-32651

This section provides insights into the impact, technical details, and mitigation strategies related to the LDAP injection vulnerability in OneDev.

What is CVE-2021-32651?

OneDev, an operations platform, suffers from an LDAP injection vulnerability that allows attackers to forge queries, explore LDAP trees, and potentially leak directory information via Blind LDAP Injection techniques.

The Impact of CVE-2021-32651

The vulnerability poses a low-severity risk with a CVSS base score of 3.1. However, the potential leakage of LDAP directory information can have privacy implications and undermine the integrity of the affected system.

Technical Details of CVE-2021-32651

Let's delve deeper into the vulnerability's description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

When LDAP external authentication is active in OneDev versions <= 4.4.1, the attacker can exploit the user search filter to execute forged queries, potentially leading to Blind LDAP Injection and directory information leakage.

Affected Systems and Versions

OneDev versions 4.4.1 and earlier are impacted by this vulnerability. Users of these versions are at risk of LDAP injection attacks if LDAP external authentication is enabled.

Exploitation Mechanism

The vulnerability allows attackers to manipulate the User Search Filter and send malicious queries to the application, enabling them to explore the LDAP tree and extract sensitive directory information.

Mitigation and Prevention

Here, we outline immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Organizations using affected versions should upgrade to OneDev 4.4.2 or later. Disable LDAP external authentication if not required to mitigate the vulnerability's exploitation.

Long-Term Security Practices

Implement secure coding practices and regularly review configurations to prevent similar injection attacks. Conduct security training to raise awareness among developers and administrators.

Patching and Updates

Stay informed about security advisories from OneDev and promptly apply patches and updates to address known vulnerabilities and enhance the platform's security posture.