CVE-2021-27191 Explained : Impact and Mitigation

The get-ip-range package before 4.0.0 for Node.js is vulnerable to denial of service (DoS) if the range is untrusted input. An attacker could send a large range (such as 128.0.0.0/1) that causes resource exhaustion.

Understanding CVE-2021-27191

This section will provide insights into the vulnerability and its impact.

What is CVE-2021-27191?

The CVE-2021-27191 vulnerability affects the get-ip-range package before version 4.0.0 for Node.js. It can be exploited for denial of service (DoS) attacks when untrusted input is provided.

The Impact of CVE-2021-27191

The vulnerability can lead to resource exhaustion due to a large range input, allowing attackers to disrupt service availability.

Technical Details of CVE-2021-27191

Explore the specifics of the vulnerability to understand affected systems and exploitation methods.

Vulnerability Description

The vulnerability arises when untrusted input ranges are handled by the get-ip-range package, potentially triggering a DoS condition.

Affected Systems and Versions

The get-ip-range package versions prior to 4.0.0 for Node.js are susceptible to this vulnerability.

Exploitation Mechanism

Attackers can exploit CVE-2021-27191 by sending a large range input, such as 128.0.0.0/1, to exhaust resources and disrupt services.

Mitigation and Prevention

Discover the necessary steps to mitigate the risks posed by CVE-2021-27191.

Immediate Steps to Take

Developers should update the get-ip-range package to version 4.0.0 or newer to prevent exploitation of this vulnerability.

Long-Term Security Practices

Implement input validation mechanisms and security best practices to ensure that untrusted input doesn't lead to service disruptions.

Patching and Updates

Stay informed about security advisories and regularly apply updates to address vulnerabilities like CVE-2021-27191.