CVE-2021-43812 : Vulnerability Insights and Analysis
Learn about CVE-2021-43812 affecting Auth0 Next.js SDK versions < 1.6.2. Discover its impact, technical details, and mitigation steps to address the open redirect vulnerability.
The Auth0 Next.js SDK is vulnerable to an open redirect issue in versions prior to 1.6.2, potentially exposing applications to security risks.
Understanding CVE-2021-43812
The vulnerability in the nextjs-auth0 library allows malicious actors to conduct open redirect attacks, endangering user security.
What is CVE-2021-43812?
The Auth0 Next.js SDK, versions before 1.6.2, fail to properly filter certain parameter values in the login URL, leading to an open redirect vulnerability that enables attackers to redirect users to malicious websites.
The Impact of CVE-2021-43812
This vulnerability poses a moderate risk to confidentiality, integrity, and availability, with a CVSS v3.1 base score of 6.4 (Medium severity). It necessitates immediate attention to prevent potential security breaches.
Technical Details of CVE-2021-43812
The technical aspects of the vulnerability provide insights into its implications and potential risks.
Vulnerability Description
The issue stems from inadequate filtering of returnTo parameter values in the login URL, leaving applications susceptible to open redirect attacks.
Affected Systems and Versions
- Product: nextjs-auth0
- Vendor: auth0
- Versions Affected: < 1.6.2
Exploitation Mechanism
Attackers can exploit this vulnerability by manipulating the returnTo parameter values in the login URL to redirect users to malicious sites, compromising user security.
Mitigation and Prevention
Taking immediate action and implementing long-term security practices are crucial in addressing and mitigating the risks associated with CVE-2021-43812.
Immediate Steps to Take
- Upgrade to version 1.6.2 or higher to eliminate the vulnerability.
- Monitor and validate all redirection URLs within the application for authenticity and safety.
Long-Term Security Practices
- Conduct regular security assessments and audits to identify vulnerabilities proactively.
- Educate developers and users about the risks of open redirect attacks and best security practices.
Patching and Updates
- Stay informed about security advisories and updates from Auth0 to address vulnerabilities promptly.