CVE-2024-41110

Comprehensive Technical Analysis of CVE-2024-41110

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-41110

Description: The vulnerability affects certain versions of Docker Engine, allowing an attacker to bypass authorization plugins (AuthZ) under specific circumstances. This issue arises from a regression where a fix from Docker Engine v18.09.1 was not carried forward to later major versions. The vulnerability enables an attacker to make the daemon forward an API request or response to an authorization plugin without the body, potentially leading to unauthorized actions, including privilege escalation.

CVSS Score: 9.9

Severity Evaluation: The CVSS score of 9.9 indicates a critical vulnerability. This high score is due to the potential for privilege escalation and unauthorized actions, which can have severe impacts on the security and integrity of containerized environments.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Specially-Crafted API Requests: An attacker can send a specially-crafted API request to the Docker Engine, which bypasses the authorization plugin by omitting the request or response body.
• Privilege Escalation: Once the authorization plugin is bypassed, the attacker can perform actions that would normally be denied, leading to privilege escalation.

Exploitation Methods:

• API Manipulation: The attacker manipulates the API request to omit the body, causing the authorization plugin to fail in making an accurate access control decision.
• Unauthorized Actions: The attacker can then perform unauthorized actions, such as creating or modifying containers, accessing sensitive data, or executing malicious code within the container environment.

3. Affected Systems and Software Versions

Affected Versions:

• Docker Engine versions that do not include the patches merged into the master, 19.03, 20.0, 23.0, 24.0, 25.0, 26.0, and 26.1 release branches.

Unaffected Versions:

• Docker EE v19.03.x
• All versions of Mirantis Container Runtime
• docker-ce v27.1.1 (contains the patch)

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Avoid Using AuthZ Plugins: If immediate patching is not possible, avoid using authorization plugins that introspect the request and/or response body.
• Restrict API Access: Follow the principle of least privilege by restricting access to the Docker API to trusted parties only.

Long-Term Mitigation:

• Upgrade Docker Engine: Upgrade to docker-ce v27.1.1 or apply the patches to the affected versions.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues promptly.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Increased Risk of Unauthorized Access: Organizations relying on Docker Engine for containerization are at risk of unauthorized access and privilege escalation.
• Potential Data Breaches: Sensitive data within containers could be accessed or modified by unauthorized users.

Long-Term Impact:

• Trust in Container Security: This vulnerability highlights the importance of robust security measures in containerized environments, potentially affecting trust in container security solutions.
• Need for Continuous Monitoring: The incident underscores the need for continuous monitoring and prompt patching of containerization platforms.

6. Technical Details for Security Professionals

Technical Overview:

• Vulnerability Mechanism: The vulnerability arises from the Docker Engine daemon forwarding API requests or responses to the authorization plugin without the body, leading to incorrect access control decisions.
• Regression Issue: The fix implemented in Docker Engine v18.09.1 was not carried forward to later versions, resulting in a regression that reintroduced the vulnerability.

Detection and Response:

• Log Analysis: Monitor Docker Engine logs for unusual API requests or unauthorized actions.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious activities within the container environment.
• Incident Response Plan: Develop and maintain an incident response plan specific to container security, including steps for isolating affected containers and mitigating the impact of unauthorized actions.

Patching and Updates:

• Patch Management: Ensure that all Docker Engine instances are patched with the latest security updates.
• Automated Updates: Consider implementing automated update mechanisms to ensure timely application of security patches.

Conclusion: CVE-2024-41110 represents a critical vulnerability in Docker Engine that requires immediate attention. Organizations should prioritize patching affected systems and implementing robust security measures to mitigate the risk of unauthorized access and privilege escalation. Continuous monitoring and regular security audits are essential to maintain the integrity and security of containerized environments.