CVE-2021-36716 Explained : Impact and Mitigation
Discover the details of CVE-2021-36716, a ReDoS flaw in Segment's is-email package prior to 1.0.1 for Node.js. Learn about the impact, affected systems, exploitation mechanism, and mitigation steps.
A ReDoS (regular expression denial of service) vulnerability has been identified in the Segment is-email package prior to version 1.0.1 for Node.js. This flaw could be exploited by an attacker to cause high CPU consumption in the targeted application.
Understanding CVE-2021-36716
This section provides insights into the nature and impact of CVE-2021-36716.
What is CVE-2021-36716?
The CVE-2021-36716 CVE ID refers to a ReDoS vulnerability in the Segment is-email package prior to version 1.0.1 for Node.js. Attackers could abuse this flaw to trigger excessive CPU utilization by providing malicious input to the isEmail(input) function.
The Impact of CVE-2021-36716
CVE-2021-36716 poses a threat where attackers could carry out Denial of Service (DoS) attacks by exploiting the ReDoS vulnerability, hampering the performance of affected applications.
Technical Details of CVE-2021-36716
Explore the technical aspects of the CVE-2021-36716 vulnerability in this section.
Vulnerability Description
The vulnerability stems from improper input validation in the isEmail(input) function, allowing attackers to construct malicious input that leads to CPU exhaustion.
Affected Systems and Versions
The vulnerable versions include all releases of the Segment is-email package prior to version 1.0.1 for Node.js.
Exploitation Mechanism
By providing specially crafted input to the isEmail(input) function, threat actors can trigger long-running regular expressions, causing the targeted application to consume excessive CPU resources.
Mitigation and Prevention
Learn about the essential steps to mitigate the risks associated with CVE-2021-36716 and prevent potential exploitation.
Immediate Steps to Take
Update the Segment is-email package to version 1.0.1 or above to remediate the ReDoS vulnerability and prevent DoS attacks in your Node.js applications.
Long-Term Security Practices
Adopt secure coding practices, perform regular security audits, and stay informed about vulnerabilities and patches to enhance the overall security posture of your applications.
Patching and Updates
Stay vigilant for security advisories and updates from Segment regarding CVE-2021-36716. Timely patching and maintaining up-to-date dependencies are crucial in mitigating risks from known vulnerabilities.