Keymaker before version 0.2.0 is prone to a Path Traversal vulnerability (CVE-2021-21269) that could allow an attacker to access unauthorized files. Learn about the impact and mitigation of this security issue.
Keymaker, a Mastodon Community Finder based Matrix Community serverlist page Server, is vulnerable to Path Traversal before version 0.2.0. This vulnerability could allow an attacker to perform a Path Traversal attack, potentially leading to unauthorized file access. Here's what you need to know about CVE-2021-21269:
Understanding CVE-2021-21269
Keymaker's vulnerability lies in its assets endpoint before version 0.2.0. The lack of extension validation in this endpoint could be exploited through a Path Traversal attack.
What is CVE-2021-21269?
In Keymaker versions prior to 0.2.0, the assets endpoint did not validate extensions, enabling a Path Traversal attack. By exploiting the rust
join
method without proper input validation, an attacker could access more files than intended.
The Impact of CVE-2021-21269
This vulnerability has a CVSS v3.1 base score of 7.7, classifying it as a high severity issue. It affects confidentiality with a high impact while requiring low privileges and user interaction, making it exploitable over a network without user interaction.
Technical Details of CVE-2021-21269
The technical details of CVE-2021-21269 include:
Vulnerability Description
The vulnerability arises from Keymaker's assets endpoint not checking for file extensions, potentially leading to a Path Traversal attack.
Affected Systems and Versions
Keymaker versions prior to 0.2.0 are affected by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by utilizing the rust
join
method without validating user input, enabling unauthorized file access.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-21269, consider the following steps:
Immediate Steps to Take
Update Keymaker to version 0.2.0 or higher to address this vulnerability. Verify and sanitize user input to prevent Path Traversal attacks.
Long-Term Security Practices
Adopt secure coding practices, conduct regular security assessments, and stay informed about software vulnerabilities.
Patching and Updates
Stay informed about security advisories and updates related to Keymaker to ensure timely patching of vulnerabilities.