CVE-2023-40584 Information

Description

Argo CD is a declarative continuous deployment for Kubernetes. All versions of ArgoCD starting from v2.4 have a bug where the ArgoCD repo-server component is vulnerable to a Denial-of-Service attack vector. Specifically the said component extracts a user-controlled tar.gz file without validating the size of its inner files. As a result a malicious low-privileged user can send a malicious tar.gz file that exploits this vulnerability to the repo-server thereby harming the system’s functionality and availability. Additionally the repo-server is susceptible to another vulnerability due to the fact that it does not check the extracted file permissions before attempting to delete them. Consequently an attacker can craft a malicious tar.gz archive in a way that prevents the deletion of its inner files when the manifest generation process is completed. A patch for this vulnerability has been released in versions 2.6.15 2.7.14 and 2.8.3. Users are advised to upgrade. The only way to completely resolve the issue is to upgrade however users unable to upgrade should configure RBAC (Role-Based Access Control) and provide access for configuring applications only to a limited number of administrators. These administrators should utilize trusted and verified Helm charts.

Reference

https://github.com/argoproj/argo-cd/commit/b8f92c4ff226346624f43de3f25d81dac6386674 https://github.com/argoproj/argo-cd/security/advisories/GHSA-g687-f2gx-6wm8