CVE-2021-37699 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-37699, an open redirect vulnerability in Next.js versions < 11.1.0. Learn about the exploitation mechanism, affected systems, and mitigation steps.
Next.js, an open-source website development framework by Vercel, was found to have a vulnerability in versions below 11.1.0 that could lead to an open redirect attack. This CVE-2021-37699 affects the security of websites developed using Next.js.
Understanding CVE-2021-37699
This CVE reveals a flaw in how specially encoded paths could be utilized in Next.js, potentially resulting in an open redirect to an external site when pages/_error.js is statically generated. This vulnerability has been addressed in version 11.1.0 of Next.js.
What is CVE-2021-37699?
Next.js, used with React library, allowed specially encoded paths to be exploited, leading to an open redirect to an external site, which could be leveraged for phishing attacks.
The Impact of CVE-2021-37699
While the open redirect itself may not directly harm users, it can facilitate phishing attacks by redirecting them to malicious domains from trusted ones. It is crucial to upgrade to the patched version.
Technical Details of CVE-2021-37699
The vulnerability in Next.js below version 11.1.0 allows attackers to exploit specially encoded paths for open redirects, impacting the confidentiality of user data.
Vulnerability Description
Specially encoded paths could be used to trigger an open redirect to an external site when pages/_error.js was statically generated, potentially endangering user security.
Affected Systems and Versions
Next.js versions below 11.1.0 are susceptible to this vulnerability.
Exploitation Mechanism
Attackers can craft encoded paths to trigger an open redirect, redirecting users to malicious sites.
Mitigation and Prevention
To safeguard your system from CVE-2021-37699, immediate actions and long-term security practices are crucial.
Immediate Steps to Take
Upgrade to Next.js version 11.1.0 or higher to eliminate the vulnerability and prevent potential attacks.
Long-Term Security Practices
Regularly update Next.js to the latest versions, implement security best practices, and stay informed about potential vulnerabilities.
Patching and Updates
Refer to the Next.js release notes and security advisories for patch releases and updates to address security concerns.