CVE-2020-11629 : Exploit Details and Defense Strategies

An issue was discovered in EJBCA before 6.15.2.6 and 7.x before 7.3.1.2 where the External Command Certificate Validator could allow an attacker to upload malicious scripts to the server.

Understanding CVE-2020-11629

This CVE identifies a vulnerability in EJBCA versions prior to 6.15.2.6 and 7.x before 7.3.1.2 that could be exploited by attackers with access to the CA UI.

What is CVE-2020-11629?

The External Command Certificate Validator in EJBCA, designed to save uploaded test certificates, could be manipulated by attackers to upload malicious scripts to the server.

The Impact of CVE-2020-11629

The vulnerability allows attackers with CA UI access to upload harmful scripts, posing a risk if a malicious user gains entry through other means.

Technical Details of CVE-2020-11629

This section delves into the specifics of the vulnerability.

Vulnerability Description

The issue in EJBCA versions before 6.15.2.6 and 7.x before 7.3.1.2 enables attackers to upload malicious scripts via the External Command Certificate Validator.

Affected Systems and Versions

EJBCA versions before 6.15.2.6
EJBCA 7.x before 7.3.1.2

Exploitation Mechanism

Attackers with CA UI access can exploit the validator to upload harmful scripts to the server.

Mitigation and Prevention

Protecting systems from CVE-2020-11629 is crucial for security.

Immediate Steps to Take

Update EJBCA to versions 6.15.2.6 or 7.3.1.2 to patch the vulnerability.
Monitor CA UI access and restrict permissions to prevent unauthorized uploads.

Long-Term Security Practices

Regularly audit and review CA UI activities for suspicious behavior.
Implement multi-factor authentication to enhance access control.

Patching and Updates

Apply security patches promptly to prevent exploitation of known vulnerabilities.