CVE-2021-26028 : Security Advisory and Response
Discover the impact of CVE-2021-26028, a path traversal vulnerability in Joomla! CMS versions 3.0.0 to 3.9.24, allowing unauthorized file writes outside intended paths. Learn how to mitigate and prevent exploitation.
An overview of CVE-2021-26028, a vulnerability in Joomla! CMS versions 3.0.0 to 3.9.24 that allows files to be written outside the intended path.
Understanding CVE-2021-26028
This section dives into the impact, technical details, and mitigation strategies of CVE-2021-26028.
What is CVE-2021-26028?
CVE-2021-26028 is a path traversal vulnerability discovered in Joomla! CMS versions 3.0.0 through 3.9.24. It enables the extraction of specifically crafted zip packages to write files outside the intended directory.
The Impact of CVE-2021-26028
The vulnerability could be exploited by a malicious actor to overwrite critical system files or plant malicious files on the server, potentially leading to unauthorized access or system compromise.
Technical Details of CVE-2021-26028
Let's explore the technical aspects of this security issue.
Vulnerability Description
The issue allows an attacker to manipulate zip packages to traverse beyond the expected storage directory, leading to unauthorized file writes outside the intended path.
Affected Systems and Versions
Joomla! CMS versions 3.0.0 to 3.9.24 are affected by this vulnerability, exposing websites and servers leveraging these versions to potential attacks.
Exploitation Mechanism
Malicious actors exploit this vulnerability by crafting zip packages in a specific manner to maneuver file writing activities outside the intended directory.
Mitigation and Prevention
Protecting systems and data from CVE-2021-26028 requires immediate actions and long-term security practices.
Immediate Steps to Take
Website administrators are advised to apply patches promptly, restrict file permissions, and monitor system activities for any signs of unauthorized file writes.
Long-Term Security Practices
Incorporating strict input validation mechanisms, employing access controls, and staying updated with security advisories can help prevent path traversal vulnerabilities.
Patching and Updates
It is crucial to regularly update Joomla! CMS to the latest secure versions and implement security best practices to mitigate the risk of path traversal attacks.