CVE-2021-28092 : Vulnerability Insights and Analysis

A vulnerability has been identified in the is-svg package versions 2.1.0 through 4.2.1 for Node.js, leading to a Regular Expression Denial of Service (ReDoS) risk.

Understanding CVE-2021-28092

This CVE pertains to a regex vulnerability in the is-svg package for Node.js, potentially causing performance issues when processing malicious input.

What is CVE-2021-28092?

The is-svg package versions 2.1.0 through 4.2.1 for Node.js contain a regex vulnerability that can be exploited by attackers to trigger a Regular Expression Denial of Service (ReDoS) condition. When provided with a malicious string, the package may become unresponsive, processing the input for an extensive period.

The Impact of CVE-2021-28092

The impact of this vulnerability lies in the potential for attackers to perform Denial of Service attacks by exploiting the regex flaw in the is-svg package. This could lead to resource exhaustion and significant performance degradation.

Technical Details of CVE-2021-28092

This section dives deeper into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises from a regex implementation in the is-svg package versions 2.1.0 through 4.2.1 for Node.js. The flawed regex allows attackers to craft inputs that trigger a ReDoS condition, causing prolonged processing times.

Affected Systems and Versions

The impacted systems include all installations running is-svg versions 2.1.0 through 4.2.1 in Node.js environments.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing specially crafted inputs containing malicious strings to the affected is-svg package. When processed, these inputs can cause the package to hang indefinitely, affecting system responsiveness.

Mitigation and Prevention

To address CVE-2021-28092, immediate action and long-term security practices are recommended.

Immediate Steps to Take

Users are advised to update the is-svg package to version 4.2.2 or later to mitigate the risk associated with this vulnerability. Additionally, input validation mechanisms should be enforced to prevent malicious inputs.

Long-Term Security Practices

In the long term, developers and administrators should stay vigilant for security updates related to the is-svg package and other dependencies. Regular security assessments and code reviews can help identify and address vulnerabilities proactively.

Patching and Updates

Regularly check for updates and security advisories related to the is-svg package to ensure that your applications are protected against known vulnerabilities.