CVE-2023-40026 Explained : Impact and Mitigation
Learn about CVE-2023-40026, a path traversal vulnerability in Argo CD < 2.3, allowing out-of-bound Helm chart leaks. Take immediate steps to update to secure versions.
This article provides detailed information about CVE-2023-40026, a vulnerability that allows path traversal and leaking out-of-bound Helm charts from Argo CD repo-server.
Understanding CVE-2023-40026
This section covers the impact and technical details of CVE-2023-40026.
What is CVE-2023-40026?
CVE-2023-40026 relates to a path traversal vulnerability in Argo CD versions prior to 2.3, allowing the leaking of out-of-bound Helm charts from the repo-server.
The Impact of CVE-2023-40026
The vulnerability exposed values and files from external Helm charts, potentially leading to unauthorized data access within affected systems.
Technical Details of CVE-2023-40026
Here we dive deeper into the vulnerability specifics.
Vulnerability Description
Argo CD pre-2.3 versions, when processing specially-crafted Helm files, could reference external Helm charts from the same repo-server, thus leaking values and files due to predictable Helm paths.
Affected Systems and Versions
The vulnerability affects Argo CD versions prior to 2.3, particularly impacting instances using Helm versions before 2.3 with predictable paths for Helm resources.
Exploitation Mechanism
By adding a malicious Helm chart pointing to predictable paths, an attacker could access and extract data from existing Helm charts on the repo-server without necessary permissions.
Mitigation and Prevention
To secure systems against CVE-2023-40026, follow these best practices.
Immediate Steps to Take
Users are advised to update Argo CD to version 2.3 or newer to mitigate the path traversal vulnerability. If updating is not feasible, consider disabling Helm chart rendering or employing separate repo-servers for each Helm chart.
Long-Term Security Practices
Regularly monitor for security advisories and updates from Argo CD to stay informed about potential vulnerabilities and patches.
Patching and Updates
Stay proactive in applying security patches and updates provided by Argo CD to mitigate vulnerabilities and enhance system security.