CVE-2021-23413 : Security Advisory and Response

A detailed overview of CVE-2021-23413 affecting the package jszip before version 3.7.0, with a focus on the Denial of Service (DoS) vulnerability.

Understanding CVE-2021-23413

CVE-2021-23413 is a Denial of Service (DoS) vulnerability found in the jszip package before version 3.7.0, impacting the integrity of the affected systems.

What is CVE-2021-23413?

This vulnerability allows attackers to manipulate zip files by setting filenames to specific values, resulting in a modified prototype instance and potential service disruption.

The Impact of CVE-2021-23413

The impact of CVE-2021-23413 is rated as 'MEDIUM' with a CVSS base score of 5.3. It can lead to a Denial of Service (DoS) condition with low complexity attacks over the network.

Technical Details of CVE-2021-23413

Understanding the vulnerability description, affected systems, versions, and exploitation mechanism of CVE-2021-23413.

Vulnerability Description

Crafting a new zip file with filenames set to Object prototype values (e.g., proto, toString) leads to a modified prototype instance, posing a security risk.

Affected Systems and Versions

The vulnerability affects jszip versions prior to 3.7.0. Systems using these versions are susceptible to the Denial of Service (DoS) exploit.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the filenames of zip files, triggering the altered prototype behavior and causing a potential DoS attack.

Mitigation and Prevention

Guidance on immediate steps to take, long-term security practices, and the importance of patching and updates in addressing CVE-2021-23413.

Immediate Steps to Take

Users are advised to upgrade jszip to version 3.7.0 or later to mitigate the vulnerability. Avoiding untrusted zip files can also reduce the risk of exploitation.

Long-Term Security Practices

Implement secure coding practices, regularly update dependencies, and conduct security assessments to strengthen the overall security posture of the system.

Patching and Updates

Stay informed about security patches released by jszip and promptly apply them to secure the software against potential security threats.