CVE-2020-29555 : What You Need to Know

Grav CMS through 1.7.0-rc.17 is vulnerable to an attack that allows an authenticated or unauthenticated attacker to delete arbitrary files on the server.

Understanding CVE-2020-29555

This CVE involves a vulnerability in the BackupDelete functionality of Grav CMS.

What is CVE-2020-29555?

The BackupDelete feature in Grav CMS up to version 1.7.0-rc.17 permits attackers to delete files on the server through a path-traversal method. The absence of CSRF protection also enables unauthenticated attackers to exploit this flaw.

The Impact of CVE-2020-29555

The vulnerability allows attackers to delete files on the server, potentially leading to data loss, service disruption, or unauthorized access to sensitive information.

Technical Details of CVE-2020-29555

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in Grav CMS enables attackers to delete arbitrary files on the server by leveraging a path-traversal technique, even without authentication due to CSRF protection absence.

Affected Systems and Versions

Product: Grav CMS
Versions: Up to 1.7.0-rc.17

Exploitation Mechanism

Attackers exploit a path-traversal technique to delete files on the server, compromising its integrity and potentially causing severe damage.

Mitigation and Prevention

Protecting systems from CVE-2020-29555 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Grav CMS to the latest version to patch the vulnerability.
Implement proper access controls and authentication mechanisms.
Regularly monitor and audit file deletion activities on the server.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities.
Educate users on secure file management practices and the importance of CSRF protection.

Patching and Updates

Apply security patches promptly to ensure that known vulnerabilities are mitigated and system integrity is maintained.