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CVE-2025-59358: Unauthenticated Access to GraphQL Debugging Server in Chaos Mesh

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Overview

The CVE-2025-59358 vulnerability affects the Chaos Controller Manager in Chaos Mesh. This critical flaw exposes a GraphQL debugging server without authentication to the entire Kubernetes cluster, opening the door for potential system compromise or data leakage. The unauthenticated access allows bad actors to kill arbitrary processes in any Kubernetes pod, consequently leading to a cluster-wide denial of service.

Vulnerability Summary

CVE ID: CVE-2025-59358
Severity: High (7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Cluster-wide denial of service, potential system compromise or data leakage

Affected Products

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Product | Affected Versions

Chaos Mesh | All versions prior to patch

How the Exploit Works

The exploit takes advantage of the lack of authentication on the GraphQL debugging server. An attacker with network access to the Kubernetes cluster can send API commands to this debugging server to kill arbitrary processes in any Kubernetes pod. This can lead to a cluster-wide denial of service and potentially compromise the system or leak data.

Conceptual Example Code

The below conceptual example demonstrates how the vulnerability might be exploited using a GraphQL mutation request:

POST /graphql HTTP/1.1
Host: target-cluster.example.com
Content-Type: application/json
{
"query": "mutation KillProcess($pod: String!) { killProcess(pod: $pod) }",
"variables": { "pod": "target-pod" }
}

In this example, the `killProcess` mutation is used to kill processes in a specific Kubernetes pod identified by the `pod` variable. By repeating this action across multiple pods, an attacker could cause a cluster-wide denial of service.

Countermeasures and Mitigation

Users are advised to apply the vendor patch as soon as it is available. Until that time, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer temporary mitigation. These tools can help block or alert on suspicious network traffic, including the unauthorized GraphQL requests used in this exploit.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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