CVE-2023-40029
CRITICALArgo CD 2.2.0-2.6.15 - Sensitive Information Exposure via kubectl.kubernetes.io/last-applied-configuration Annotation
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2023-40029. PoCs published by guobei233.
AI-analyzed exploit summary This script exploits CVE-2023-40028 (incorrectly referenced as CVE-2023-40029 in the repo) to perform arbitrary file reads in Ghost CMS by leveraging a symlink attack via a crafted ZIP upload. It authenticates, generates a malicious payload, and retrieves file contents through the vulnerable endpoint.
Description
Argo CD is a declarative continuous deployment for Kubernetes. Argo CD Cluster secrets might be managed declaratively using Argo CD / kubectl apply. As a result, the full secret body is stored in`kubectl.kubernetes.io/last-applied-configuration` annotation. pull request #7139 introduced the ability to manage cluster labels and annotations. Since clusters are stored as secrets it also exposes the `kubectl.kubernetes.io/last-applied-configuration` annotation which includes full secret body. In order to view the cluster annotations via the Argo CD API, the user must have `clusters, get` RBAC access. **Note:** In many cases, cluster secrets do not contain any actually-secret information. But sometimes, as in bearer-token auth, the contents might be very sensitive. The bug has been patched in versions 2.8.3, 2.7.14, and 2.6.15. Users are advised to upgrade. Users unable to upgrade should update/deploy cluster secret with `server-side-apply` flag which does not use or rely on `kubectl.kubernetes.io/last-applied-configuration` annotation. Note: annotation for existing secrets will require manual removal.
Exploits (1)
This script exploits CVE-2023-40028 (incorrectly referenced as CVE-2023-40029 in the repo) to perform arbitrary file reads in Ghost CMS by leveraging a symlink attack via a crafted ZIP upload. It authenticates, generates a malicious payload, and retrieves file contents through the vulnerable endpoint.
References (3)
Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L