CVE-2022-21670 : What You Need to Know

markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with a length greater than 50 thousand characters could significantly slow down the parser. Users are advised to upgrade to version 12.3.2 to receive a patch without any known workarounds.

Understanding CVE-2022-21670

This section provides an overview of the CVE-2022-21670 vulnerability in markdown-it.

What is CVE-2022-21670?

The CVE-2022-21670 vulnerability in markdown-it is related to uncontrolled resource consumption, affecting versions prior to 12.3.2. It can lead to a significant slowdown in the parser due to special patterns exceeding a length of 50 thousand characters.

The Impact of CVE-2022-21670

The impact of this vulnerability is rated as MEDIUM with a CVSS base score of 5.3. It has a low attack complexity, affects availability to a low extent, and requires no privileges or user interaction.

Technical Details of CVE-2022-21670

Explore the technical aspects of CVE-2022-21670 in markdown-it.

Vulnerability Description

The vulnerability allows special patterns with excessive length to cause a notable performance decrease in the parser, impacting system efficiency.

Affected Systems and Versions

markdown-it versions prior to 12.3.2 are affected by this vulnerability, emphasizing the importance of updating to the patched version.

Exploitation Mechanism

Attackers could exploit the vulnerability by crafting special patterns exceeding 50 thousand characters to trigger a slowdown in the parser.

Mitigation and Prevention

Discover how to mitigate the risks associated with CVE-2022-21670 in markdown-it.

Immediate Steps to Take

Users are strongly recommended to upgrade their markdown-it installation to version 12.3.2 to apply the necessary patch and eliminate the vulnerability.

Long-Term Security Practices

Maintain a proactive approach to security by staying updated on software vulnerabilities and promptly applying patches to prevent exploitation.

Patching and Updates

Regularly check for software updates and security advisories to ensure the timely application of patches and enhancements.