CVE-2023-0628: Docker Desktop RCE Vulnerability

CVE-2023-0628 Overview

CVE-2023-0628 is a command injection vulnerability affecting Docker Desktop versions prior to 4.17.0. This vulnerability allows an attacker to execute arbitrary commands inside a Dev Environments container during initialization by tricking a user into opening a crafted malicious docker-desktop:// URL. The attack leverages the custom URL protocol handler to inject commands that execute within the container context.

Critical Impact
Successful exploitation enables arbitrary command execution within Docker Dev Environments containers, potentially compromising containerized workloads and sensitive data accessed during development workflows.

Affected Products

Docker Desktop versions prior to 4.17.0
All platforms supporting Docker Desktop with Dev Environments feature enabled

Discovery Timeline

2023-03-13 - CVE-2023-0628 published to NVD
2024-11-21 - Last updated in NVD database

Technical Details for CVE-2023-0628

Vulnerability Analysis

This vulnerability is classified as CWE-77 (Improper Neutralization of Special Elements used in a Command - Command Injection). The flaw exists in how Docker Desktop processes custom docker-desktop:// protocol URLs when initializing Dev Environments containers. When a user clicks on a maliciously crafted URL, Docker Desktop fails to properly sanitize the input parameters before passing them to the container initialization process.

The attack requires local access and user interaction, as the victim must be tricked into clicking the malicious URL. However, once triggered, the attacker gains the ability to execute arbitrary commands with the privileges of the Dev Environments container, which may have access to mounted volumes, network resources, and development secrets.

Root Cause

The root cause of CVE-2023-0628 lies in insufficient input validation within the docker-desktop:// URL protocol handler. When processing URL parameters for Dev Environments initialization, the application fails to properly escape or sanitize special characters that could be interpreted as command delimiters or injection payloads. This allows an attacker to break out of the intended command context and inject additional commands.

Attack Vector

The attack vector for this vulnerability involves social engineering combined with local execution. An attacker must craft a malicious docker-desktop:// URL containing command injection payloads and convince the target user to click on it. This could be accomplished through:

Embedding the malicious URL in a phishing email or malicious website
Including the crafted URL in a seemingly legitimate document or chat message
Exploiting auto-link features in collaboration tools

The malicious URL, when clicked, is handled by Docker Desktop's protocol handler, which processes the embedded parameters during Dev Environments container initialization. The injected commands execute within the container context, potentially allowing data exfiltration, backdoor installation, or lateral movement within the development environment.

Detection Methods for CVE-2023-0628

Indicators of Compromise

Unexpected process spawning within Docker Dev Environments containers
Unusual network connections originating from development containers
Modified or newly created files within container volumes that don't match expected development activity
Docker Desktop log entries showing suspicious docker-desktop:// URL handling

Detection Strategies

Monitor for unusual command-line arguments passed to Docker Desktop processes
Implement URL filtering to detect and block suspicious docker-desktop:// protocol requests
Deploy endpoint detection solutions that can identify anomalous container initialization patterns
Review Docker Desktop application logs for malformed or suspicious URL handling events

Monitoring Recommendations

Enable verbose logging for Docker Desktop to capture URL handler activity
Monitor process creation events within Dev Environments containers for unexpected commands
Implement network monitoring to detect unusual outbound connections from development containers
Configure alerts for Docker Desktop spawning unexpected child processes

How to Mitigate CVE-2023-0628

Immediate Actions Required

Upgrade Docker Desktop to version 4.17.0 or later immediately
Educate users about the risks of clicking unknown docker-desktop:// links
Consider disabling Dev Environments feature if not required for development workflows
Review any recently accessed docker-desktop:// URLs for suspicious parameters

Patch Information

Docker has addressed this vulnerability in Docker Desktop version 4.17.0. The fix implements proper input validation and sanitization for the docker-desktop:// URL protocol handler, preventing command injection during Dev Environments container initialization. Users should refer to the Docker Desktop Release Notes for complete patch details and upgrade instructions.

Workarounds

Disable or restrict the docker-desktop:// URL protocol handler at the operating system level until patching is possible
Implement browser security policies to block or warn on custom protocol URLs
Use application allowlisting to prevent unauthorized execution through Docker Desktop
Train development teams to be cautious of unsolicited links, especially those using custom protocols

bash

# Verify Docker Desktop version
docker version --format '{{.Client.Version}}'

# Upgrade Docker Desktop (manual download required from docker.com)
# After upgrade, verify the version is 4.17.0 or higher