CVE-2021-23346 Explained : Impact and Mitigation

A detailed overview of CVE-2021-23346, a vulnerability affecting html-parse-stringify and html-parse-stringify2 packages.

Understanding CVE-2021-23346

This CVE involves a Regular Expression Denial of Service (ReDoS) vulnerability that impacts versions of html-parse-stringify and html-parse-stringify2.

What is CVE-2021-23346?

CVE-2021-23346 is a vulnerability that allows attackers to freeze a process by sending specific input to the affected packages, causing a regular expression to backtrack.

The Impact of CVE-2021-23346

The impact of this vulnerability is rated as MEDIUM with a CVSS base score of 4.8. It can result in service disruption due to high attack complexity through the network.

Technical Details of CVE-2021-23346

This section provides in-depth technical details about the vulnerability.

Vulnerability Description

The vulnerability exists in html-parse-stringify versions prior to 2.0.1 and all versions of html-parse-stringify2. It occurs when certain input triggers a regular expression to backtrack, leading to process freezing.

Affected Systems and Versions

html-parse-stringify: Versions before 2.0.1
html-parse-stringify2: All versions

Exploitation Mechanism

Attackers can exploit this vulnerability by sending malicious input to the affected packages, causing a regular expression to backtrack and freeze the process.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-23346.

Immediate Steps to Take

Users are advised to update the affected packages to a patched version to prevent exploitation of this vulnerability.

Long-Term Security Practices

Maintain awareness of security updates for vulnerable packages and regularly apply patches to address known vulnerabilities.

Patching and Updates

Stay informed about security releases and apply updates promptly to ensure that your systems are protected against potential attacks.