CVE-2020-13450 : What You Need to Know

A directory traversal vulnerability in file upload function of Gotenberg through 6.2.1 allows an attacker to upload and overwrite any writable files outside the intended folder. This can lead to DoS, a change to program behavior, or code execution.

Understanding CVE-2020-13450

This CVE involves a directory traversal vulnerability in the file upload function of Gotenberg, potentially enabling unauthorized access and file manipulation.

What is CVE-2020-13450?

CVE-2020-13450 is a security vulnerability in Gotenberg versions up to 6.2.1 that permits attackers to upload and overwrite files beyond the designated directory, posing risks of DoS attacks, altering program behavior, or executing malicious code.

The Impact of CVE-2020-13450

The exploitation of this vulnerability can result in severe consequences, including denial of service, unauthorized data access, unauthorized code execution, and potential compromise of the entire system's security.

Technical Details of CVE-2020-13450

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

Vulnerability Description

The vulnerability allows threat actors to bypass file upload restrictions in Gotenberg, enabling them to upload and overwrite files located outside the intended directory, leading to various security risks.

Affected Systems and Versions

Gotenberg versions up to 6.2.1 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the file upload function to traverse directories and access or modify files outside the intended scope, potentially causing significant harm.

Mitigation and Prevention

Protecting systems from CVE-2020-13450 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Gotenberg to a patched version that addresses the directory traversal vulnerability.
Implement proper input validation and file upload restrictions to prevent unauthorized access.
Monitor file upload activities for any suspicious behavior.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Educate users and developers on secure coding practices and the importance of secure file handling.

Patching and Updates

Stay informed about security updates and patches released by Gotenberg to address known vulnerabilities and enhance system security.