CVE-2020-19138 : Security Advisory and Response

DotCMS v5.2.3 and earlier versions are vulnerable to an Unrestricted File Upload issue that allows remote attackers to execute arbitrary code.

Understanding CVE-2020-19138

This CVE identifies a critical security vulnerability in DotCMS versions prior to v5.2.3.

What is CVE-2020-19138?

The vulnerability allows malicious actors to upload files with dangerous types, leading to the execution of arbitrary code.

The Impact of CVE-2020-19138

Exploitation of this vulnerability can result in remote code execution, potentially compromising the entire system.

Technical Details of CVE-2020-19138

DotCMS v5.2.3 and earlier versions are susceptible to a critical security flaw.

Vulnerability Description

The issue arises from the unrestricted upload of files with dangerous types, enabling attackers to execute malicious code.

Affected Systems and Versions

DotCMS v5.2.3 and earlier versions

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading malicious files through the component "/src/main/java/com/dotmarketing/filters/CMSFilter.java".

Mitigation and Prevention

It is crucial to take immediate action to secure systems against CVE-2020-19138.

Immediate Steps to Take

Update DotCMS to the latest version that includes a patch for this vulnerability.
Implement file upload restrictions and validation to prevent unauthorized file uploads.
Monitor file upload activities for suspicious behavior.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities.
Educate users on safe file handling practices and the risks associated with file uploads.

Patching and Updates

Apply security patches provided by DotCMS promptly to mitigate the risk of exploitation.