CVE-2020-29556 Explained : Impact and Mitigation
Learn about CVE-2020-29556, a critical path-traversal vulnerability in Grav CMS allowing attackers to access sensitive files on the server. Find mitigation steps and best practices here.
Grav CMS through 1.7.0-rc.17 is vulnerable to a path-traversal attack that allows an attacker to read arbitrary local files on the server.
Understanding CVE-2020-29556
This CVE describes a security vulnerability in Grav CMS that enables attackers to access sensitive files on the server.
What is CVE-2020-29556?
The Backup functionality in Grav CMS through version 1.7.0-rc.17 allows both authenticated and unauthenticated attackers to exploit a path-traversal technique, leading to unauthorized access to local files on the server.
The Impact of CVE-2020-29556
The vulnerability poses a significant risk as it can be leveraged by attackers to retrieve sensitive information stored on the server, compromising data confidentiality and potentially leading to further exploitation.
Technical Details of CVE-2020-29556
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The Backup feature in Grav CMS up to version 1.7.0-rc.17 is susceptible to a path-traversal attack, enabling attackers to read arbitrary local files on the server. Additionally, the lack of Cross-Site Request Forgery (CSRF) protection further exacerbates the exploitability of this vulnerability.
Affected Systems and Versions
- Product: Grav CMS
- Versions: up to 1.7.0-rc.17
Exploitation Mechanism
Attackers can exploit this vulnerability by manipulating file paths within the Backup functionality, allowing them to traverse directories and access files that should be restricted.
Mitigation and Prevention
Protecting systems from CVE-2020-29556 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable or restrict access to the Backup functionality in Grav CMS if not essential for operations.
- Implement proper input validation to prevent path-traversal attacks.
- Regularly monitor and review server logs for any suspicious activities.
Long-Term Security Practices
- Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
- Stay informed about security updates and patches released by Grav CMS to mitigate known vulnerabilities.
Patching and Updates
- Apply patches and updates provided by Grav CMS promptly to address the vulnerability and enhance system security.