CVE-2019-5418 : Security Advisory and Response

An issue related to File Content Disclosure has been identified in Action View versions 5.2.2.1, 5.1.6.2, 5.0.7.2, 4.2.11.1, and v3. This vulnerability occurs when deliberately manipulated accept headers are used, leading to the potential exposure of the contents of any file located on the target system's filesystem.

Understanding CVE-2019-5418

This CVE involves a File Content Disclosure vulnerability in Action View versions 5.2.2.1, 5.1.6.2, 5.0.7.2, 4.2.11.1, and v3, allowing exposure of arbitrary file contents.

What is CVE-2019-5418?

The vulnerability arises from specially crafted accept headers that can expose the contents of arbitrary files on the target system's filesystem.

The Impact of CVE-2019-5418

Attackers can potentially access sensitive information stored in files on the affected system.
Unauthorized disclosure of confidential data may occur due to this vulnerability.

Technical Details of CVE-2019-5418

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability allows attackers to view the contents of arbitrary files on the target system by manipulating accept headers.

Affected Systems and Versions

Rails versions 5.2.2.1, 5.1.6.2, 5.0.7.2, and 4.2.11.1 are affected by this vulnerability.

Exploitation Mechanism

Attackers exploit this vulnerability by using specially crafted accept headers to access and expose the contents of files on the target system.

Mitigation and Prevention

Protect your systems from CVE-2019-5418 with the following steps:

Immediate Steps to Take

Update Rails to a patched version that addresses the vulnerability.
Monitor system logs for any suspicious activity that may indicate exploitation.
Implement strict input validation to prevent header manipulation.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Conduct security audits and penetration testing to identify and address potential weaknesses.
Educate users and developers on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Ensure that all affected systems are updated with the latest patches provided by Rails to fix the File Content Disclosure vulnerability.