CVE-2021-32645 : What You Need to Know

Open Redirect in tenancy is a vulnerability found in the Tenancy multi-tenant open source controller for the Laravel web framework. This CVE allows attackers to craft URLs that redirect users to malicious sites.

Understanding CVE-2021-32645

This section will cover what CVE-2021-32645 is, its impact, technical details, and mitigation strategies.

What is CVE-2021-32645?

CVE-2021-32645, known as Open Redirect in tenancy, occurs due to open redirects in multi-tenant installations using default Hostname Identification and tenants with 'force_https' enabled. Attackers can exploit this to redirect users to arbitrary sites.

The Impact of CVE-2021-32645

The CVSS base score for CVE-2021-32645 is 4.3, indicating a medium severity issue. Although no privilege escalation or data confidentiality breach is involved, the integrity of affected systems is at risk.

Technical Details of CVE-2021-32645

Let's delve into the technical aspects of CVE-2021-32645, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability enables attackers to conduct URL redirection to untrusted sites, allowing them to trick users into visiting malicious pages.

Affected Systems and Versions

The vulnerability affects multi-tenant installations with 'force_https' enabled on versions >=5.6.0 and < 5.7.2 of the tenancy controller.

Exploitation Mechanism

Attackers can exploit this vulnerability by creating specially crafted URLs that leverage the open redirect flaw to redirect users to malicious websites.

Mitigation and Prevention

Discover how to address and prevent CVE-2021-32645, from immediate steps to long-term security practices and the significance of patching and updates.

Immediate Steps to Take

Users can mitigate the risk by applying the patches provided in version 5.7.2 or by setting the 'force_https' parameter to 'false' for every tenant.

Long-Term Security Practices

To enhance security, consider implementing secure coding practices, conducting regular security audits, and educating users about phishing risks.

Patching and Updates

Regularly update the tenancy multi-tenant controller to the latest version to ensure that security patches are applied and vulnerabilities are mitigated.