CVE-2021-21602 : Vulnerability Insights and Analysis

A detailed overview of CVE-2021-21602 focusing on the impact, technical details, and mitigation strategies.

Understanding CVE-2021-21602

This section delves into the nature of the vulnerability and its implications.

What is CVE-2021-21602?

CVE-2021-21602 relates to Jenkins versions 2.274 and earlier, LTS 2.263.1 and earlier, enabling unauthorized access to files through symbolic links in workspaces and archived artifacts.

The Impact of CVE-2021-21602

The vulnerability facilitates unauthorized file viewing, potentially exposing sensitive information and compromising system integrity.

Technical Details of CVE-2021-21602

Explore the specifics of the vulnerability, including its description, affected systems, and exploitation methods.

Vulnerability Description

Jenkins versions 2.274 and below, LTS 2.263.1 and below, are susceptible to file browsing attacks through symlinks, allowing unauthorized data access.

Affected Systems and Versions

Users with Jenkins instances running versions <= 2.274 and <= LTS 2.263.1 are at risk of file exposure due to symlink traversal.

Exploitation Mechanism

By leveraging symbolic links, threat actors can navigate file systems beyond their intended access, potentially compromising confidential information.

Mitigation and Prevention

Discover actionable steps to mitigate risks associated with CVE-2021-21602 and fortify system security.

Immediate Steps to Take

Users should update Jenkins to versions beyond 2.274 or LTS 2.263.1 to prevent unauthorized file access and enhance system protection.

Long-Term Security Practices

Implement access controls, regularly monitor file access permissions, and conduct security audits to prevent similar vulnerabilities and enhance overall system security.

Patching and Updates

Stay informed about Jenkins security advisories and promptly apply patches and updates to address known vulnerabilities and bolster system defenses.