CVE-2023-0629 : Exploit Details and Defense Strategies

This CVE-2023-0629 for Docker Desktop highlights a significant vulnerability that allows an unprivileged user to bypass Enhanced Container Isolation (ECI) restrictions before version 4.17.0.

Understanding CVE-2023-0629

This vulnerability in Docker Desktop poses a threat as it enables unauthorized users to circumvent security measures and launch containers without the additional hardening features provided by ECI.

What is CVE-2023-0629?

The vulnerability in Docker Desktop allows unprivileged users to bypass Enhanced Container Isolation (ECI) restrictions by setting the Docker host to specific configurations, enabling the launch of containers with reduced security measures. This issue particularly affects Docker Business customers in environments where users do not have local root or Administrator privileges.

The Impact of CVE-2023-0629

The impact of CVE-2023-0629 is rated as high severity with a CVSS base score of 7.1, highlighting the potential for confidentiality and integrity impacts. The vulnerability falls under the category of Functionality Bypass (CAPEC-554), presenting a critical security concern for affected systems.

Technical Details of CVE-2023-0629

Diving deeper into the technical aspects of CVE-2023-0629 provides insights into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

Docker Desktop before version 4.17.0 allows an unprivileged user to bypass Enhanced Container Isolation (ECI) restrictions by manipulating Docker host settings, thereby launching containers with reduced hardening features, ultimately compromising system security.

Affected Systems and Versions

The vulnerability impacts Docker Desktop versions from 4.13.0 before 4.17.0, exposing systems with this specific configuration to the risk of unauthorized container launches.

Exploitation Mechanism

The exploitation of CVE-2023-0629 involves setting the Docker host to docker.raw.sock, or npipe:////.pipe/docker_engine_linux on Windows, using the -H (--host) CLI flag or the DOCKER_HOST environment variable. This allows users to launch containers without the necessary ECI restrictions in place.

Mitigation and Prevention

Addressing CVE-2023-0629 requires immediate action to secure vulnerable systems and prevent potential attacks. Here are some essential steps to mitigate the risk posed by this vulnerability:

Immediate Steps to Take

Upgrade Docker Desktop to version 4.17.0 or newer to ensure the fix for this vulnerability is applied.
Review and adjust Docker host settings to prevent unauthorized users from bypassing ECI restrictions.
Implement least privilege access controls to restrict user capabilities within Docker Desktop.

Long-Term Security Practices

Regularly monitor and update Docker Desktop software to stay protected against emerging vulnerabilities.
Educate users on secure container deployment practices to minimize the risk of exploitation.
Conduct security assessments and audits to identify and address potential weaknesses in Docker Desktop configurations.

Patching and Updates

Refer to the Docker Desktop release notes for version 4.17.0 to understand the specific security enhancements and bug fixes implemented to address CVE-2023-0629. Implementing timely updates and patches is crucial for maintaining a secure container environment.