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CVE-2021-36782 is a cleartext storage of sensitive information vulnerability in SUSE Rancher affecting versions prior to 2.5.16 and 2.6.7. Rancher API objects and cluster.management.cattle.io resources stored sensitive credentials in plaintext, allowing authenticated users with sufficient read access—such as Cluster Owners, Cluster Members, Project Owners, Project Members, and User Base roles—to retrieve secrets through the Kubernetes API or Rancher API endpoints. Exposed data could include passwords, API keys, and Rancher service account tokens.
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This repository contains a single Metasploit auxiliary module targeting Rancher (up to versions 2.5.15 and 2.6.6) affected by CVE-2021-36782. The module exploits an information disclosure vulnerability where Rancher stores sensitive credentials (passwords, API keys, service account tokens) in plaintext within Kubernetes objects accessible via the Rancher API. The exploit requires valid credentials for a Rancher user with API access. Upon successful authentication, it queries multiple API endpoints to enumerate and extract sensitive fields from the returned JSON data. The module is written in Ruby and leverages the Metasploit framework's HTTP client capabilities. The structure is typical for a Metasploit module, with clear separation of initialization, authentication, and exploitation logic. The main exploit capability is authenticated extraction of plaintext secrets from Rancher-managed Kubernetes objects via the API.
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