CVE-2020-5281 Explained : Impact and Mitigation

In Perun before version 3.9.1, a vulnerability allows VO or group managers to modify the LDAP extSource configuration, potentially leading to LDAP injection. This issue was addressed in version 3.9.1 through input sanitization.

Understanding CVE-2020-5281

This CVE involves an LDAP connector injection vulnerability in Perun, impacting versions prior to 3.9.1.

What is CVE-2020-5281?

CVE-2020-5281 is a security vulnerability in Perun that enables VO or group managers to manipulate the LDAP extSource configuration, potentially resulting in LDAP injection attacks.

The Impact of CVE-2020-5281

The vulnerability's impact is rated as medium severity with a CVSS base score of 6.2. It poses a high confidentiality impact and requires high privileges for exploitation.

Technical Details of CVE-2020-5281

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability allows unauthorized modification of LDAP extSource configuration, leading to potential LDAP injection attacks.

Affected Systems and Versions

Product: Perun
Vendor: CESNET
Versions Affected: < 3.9.1

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Privileges Required: High
User Interaction: Required
Scope: Changed

Mitigation and Prevention

Protect your systems from CVE-2020-5281 with these mitigation strategies.

Immediate Steps to Take

Update Perun to version 3.9.1 or newer to mitigate the vulnerability.
Monitor LDAP configurations for any unauthorized changes.

Long-Term Security Practices

Implement input validation and sanitization to prevent injection attacks.
Regularly review and update access controls to limit configuration modifications.

Patching and Updates

Apply security patches promptly to ensure protection against known vulnerabilities.