CVE-2021-28169 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-28169 impacting Eclipse Jetty.

Understanding CVE-2021-28169

This section provides insights into the vulnerability, its impact, technical details, and mitigation steps.

What is CVE-2021-28169?

CVE-2021-28169 affects Eclipse Jetty versions <= 9.4.40, <= 10.0.2, and <= 11.0.2, allowing access to protected resources within the WEB-INF directory through a ConcatServlet with a doubly encoded path.

The Impact of CVE-2021-28169

The vulnerability can expose sensitive information of a web application's implementation by enabling access to protected resources.

Technical Details of CVE-2021-28169

This section delves into the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

Requests to the ConcatServlet with a doubly encoded path can lead to unauthorized access to protected resources within the WEB-INF directory.

Affected Systems and Versions

Eclipse Jetty versions <= 9.4.40, <= 10.0.2, and <= 11.0.2 are affected by this vulnerability.

Exploitation Mechanism

Exploiting this vulnerability involves sending requests with a specially crafted path to access protected resources.

Mitigation and Prevention

Learn how to mitigate the risks posed by CVE-2021-28169 through immediate and long-term security practices.

Immediate Steps to Take

Apply relevant security patches, monitor network traffic, and implement strict access controls to limit exposure.

Long-Term Security Practices

Regularly update software, conduct security audits, and educate users on safe browsing practices to enhance overall security.

Patching and Updates

Stay informed about security advisories and promptly apply patches provided by Eclipse Jetty to address this vulnerability.