CVE-2021-22885 : What You Need to Know

A possible information disclosure / unintended method execution vulnerability in Action Pack >= 2.0.0 when using the

redirect_to

or

polymorphic_url

helper with untrusted user input.

Understanding CVE-2021-22885

This CVE involves an information disclosure and unintended method execution vulnerability in Action Pack.

What is CVE-2021-22885?

The CVE-2021-22885 is related to a vulnerability in Action Pack where untrusted user input can lead to information disclosure and unintended method execution when using certain helpers.

The Impact of CVE-2021-22885

This vulnerability could allow attackers to disclose sensitive information or execute unintended methods, potentially leading to further exploitation of the system.

Technical Details of CVE-2021-22885

This section provides more insights into the vulnerability.

Vulnerability Description

The vulnerability exists in Action Pack when utilizing the

redirect_to

or

polymorphic_url

helper functions with untrusted user input, potentially enabling information disclosure and unintended method execution.

Affected Systems and Versions

The affected versions include Rails versions 6.1.3.1, 6.0.3.7, 5.2.4.6, and 5.2.6.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing malicious input to the

redirect_to

or

polymorphic_url

helper, triggering unintended actions or revealing sensitive data.

Mitigation and Prevention

It is crucial to take immediate action to mitigate the risks associated with CVE-2021-22885.

Immediate Steps to Take

Update to a patched version of Rails to safeguard against this vulnerability.
Avoid using user input directly in helper functions to prevent potential exploits.

Long-Term Security Practices

Regularly update your software to the latest versions to address known vulnerabilities.
Educate developers on secure coding practices to minimize the risk of similar issues in the future.

Patching and Updates

Refer to the provided references for patching information and stay informed about any security advisories related to CVE-2021-22885.