CVE-2024-36265: Apache Submarine Auth Bypass Vulnerability

CVE-2024-36265 Overview

CVE-2024-36265 is an Incorrect Authorization vulnerability affecting Apache Submarine Server Core. This authorization bypass flaw allows attackers to circumvent access controls in the server core component, potentially gaining unauthorized access to protected resources and functionality. The vulnerability is particularly concerning as Apache Submarine is a retired project with no planned security patches.

Critical Impact

This authorization bypass vulnerability in an unsupported product could allow unauthenticated attackers to access sensitive machine learning workflows, experiment data, and infrastructure components with no available patches from the vendor.

Affected Products

• Apache Submarine Server Core version 0.8.0 and later
• Apache Submarine (all versions in the affected range)
• Deployments running Apache Submarine ML platform with Server Core component

Discovery Timeline

• 2024-06-12 - CVE-2024-36265 published to NVD
• 2025-03-19 - Last updated in NVD database

Technical Details for CVE-2024-36265

Vulnerability Analysis

This vulnerability stems from improper authorization checks within Apache Submarine Server Core's request handling mechanisms. The flaw is categorized under CWE-863 (Incorrect Authorization), indicating that the application performs authorization checks but does so incorrectly, allowing unintended access to protected resources.

Apache Submarine is an end-to-end machine learning platform designed to run on Kubernetes, providing capabilities for running training jobs, managing ML experiments, and serving models. The Server Core component handles API requests and manages access to the platform's functionality. The incorrect authorization implementation allows attackers to bypass intended access restrictions.

Since Apache Submarine has been officially retired by the Apache Software Foundation, no security patches will be released to address this vulnerability. Organizations using Apache Submarine must either migrate to alternative platforms or implement strict network-level access controls to mitigate the risk.

Root Cause

The root cause is an Incorrect Authorization (CWE-863) flaw in the Apache Submarine Server Core component. The authorization logic fails to properly validate user permissions when processing certain requests, allowing unauthorized users to access resources or execute operations that should be restricted. This type of vulnerability typically occurs when authorization checks are missing, incomplete, or improperly implemented in the request handling pipeline.

Attack Vector

The vulnerability is exploitable via network-based attacks without requiring authentication or user interaction. An attacker with network access to an Apache Submarine instance can craft requests that bypass the authorization controls in Server Core. Given the network-accessible nature of the attack surface and the lack of required privileges, this vulnerability presents a significant risk to any exposed Apache Submarine deployments.

The exploitation scenario involves sending specially crafted API requests to the Server Core component that circumvent authorization checks, potentially allowing access to:

• ML experiment configurations and results
• Training job management interfaces
• Model serving infrastructure
• Sensitive data processed by the platform

Detection Methods for CVE-2024-36265

Indicators of Compromise

• Unusual API requests to Apache Submarine Server Core endpoints from unexpected sources
• Access to protected resources or administrative functions from unauthenticated sessions
• Anomalous request patterns indicating authorization bypass attempts
• Unexpected modifications to ML experiments, jobs, or model configurations

Detection Strategies

• Monitor Apache Submarine Server Core access logs for requests that bypass normal authentication flows
• Implement network-level monitoring to detect unauthorized access attempts to Submarine API endpoints
• Deploy web application firewalls (WAF) to detect and block suspicious request patterns targeting authorization endpoints
• Use intrusion detection systems to identify exploitation attempts based on known attack signatures

Monitoring Recommendations

• Enable verbose logging on Apache Submarine Server Core components to capture all authorization-related events
• Implement real-time alerting for access to sensitive endpoints without proper authentication tokens
• Monitor network traffic to Apache Submarine instances for anomalous connection patterns
• Review audit logs regularly for evidence of unauthorized access or privilege escalation

How to Mitigate CVE-2024-36265

Immediate Actions Required

• Restrict network access to Apache Submarine instances to trusted users and networks only
• Implement network segmentation to isolate Apache Submarine deployments from untrusted networks
• Deploy reverse proxy or API gateway with additional authentication layers in front of Server Core
• Begin planning migration to an actively maintained ML platform alternative
• Audit existing Apache Submarine deployments for signs of unauthorized access

Patch Information

No patch is available for this vulnerability. Apache Submarine has been officially retired by the Apache Software Foundation, and no security updates will be released. Organizations are strongly advised to migrate to alternative machine learning platforms that are actively maintained and supported. For additional context, see the Apache Thread Discussion and OpenWall OSS Security Discussion.

Workarounds

• Implement strict IP-based access controls limiting access to Apache Submarine to known, trusted IP addresses
• Deploy Apache Submarine behind a VPN to ensure only authenticated users can reach the service
• Add an authentication proxy layer (such as OAuth2 Proxy or similar) in front of the Server Core API
• Disable or restrict external network access to the Apache Submarine deployment entirely
• Consider containerized isolation with strict network policies if running on Kubernetes

# Configuration example - Network restriction using iptables
# Restrict access to Apache Submarine Server Core (default port 8080) to trusted network only
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP

# Kubernetes NetworkPolicy example to restrict access
# kubectl apply -f submarine-network-policy.yaml