forked from claude-did-this/claude-hub
fix: Prevent command injection vulnerability in Docker execution
- Replace string-based command construction with array-based execFileAsync - Add comprehensive pattern-based credential redaction - Implement least-privilege container security with configurable capabilities - Add resource limits for Docker containers - Add tests for Docker command execution security - Use file-based handling for long commands 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
ClaudeBot
@@ -83,12 +83,12 @@ For real functionality, please configure valid GitHub and Claude API tokens.`;
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}
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// Build Docker image if it doesn't exist
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const dockerImageName = 'claude-code-runner:latest';
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const dockerImageName = process.env.CLAUDE_CONTAINER_IMAGE || 'claude-code-runner:latest';
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try {
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execFileSync('docker', ['inspect', dockerImageName], { stdio: 'ignore' });
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logger.info('Docker image already exists');
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logger.info({ dockerImageName }, 'Docker image already exists');
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} catch (e) {
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logger.info('Building Docker image for Claude Code runner');
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logger.info({ dockerImageName }, 'Building Docker image for Claude Code runner');
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execFileSync('docker', ['build', '-f', 'Dockerfile.claudecode', '-t', dockerImageName, '.'], {
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cwd: path.join(__dirname, '../..'),
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stdio: 'pipe'
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@@ -179,34 +179,100 @@ Please complete this task fully and autonomously.`;
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'Starting Claude Code container'
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);
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const dockerCommand = `docker run --rm --privileged --cap-add=NET_ADMIN --cap-add=NET_RAW --cap-add=SYS_TIME --cap-add=DAC_OVERRIDE --cap-add=AUDIT_WRITE --cap-add=SYS_ADMIN --name ${containerName} ${envArgs} ${dockerImageName}`;
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// Build docker run command as an array to prevent command injection
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const dockerArgs = [
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'run',
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'--rm'
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];
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// Apply container security constraints based on environment variables
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if (process.env.CLAUDE_CONTAINER_PRIVILEGED === 'true') {
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dockerArgs.push('--privileged');
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} else {
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// Apply only necessary capabilities instead of privileged mode
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const requiredCapabilities = [
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'NET_ADMIN', // Required for firewall setup
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'SYS_ADMIN' // Required for certain filesystem operations
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];
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// Add optional capabilities
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const optionalCapabilities = {
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'NET_RAW': process.env.CLAUDE_CONTAINER_CAP_NET_RAW === 'true',
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'SYS_TIME': process.env.CLAUDE_CONTAINER_CAP_SYS_TIME === 'true',
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'DAC_OVERRIDE': process.env.CLAUDE_CONTAINER_CAP_DAC_OVERRIDE === 'true',
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'AUDIT_WRITE': process.env.CLAUDE_CONTAINER_CAP_AUDIT_WRITE === 'true'
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};
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// Add required capabilities
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requiredCapabilities.forEach(cap => {
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dockerArgs.push(`--cap-add=${cap}`);
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});
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// Add optional capabilities if enabled
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Object.entries(optionalCapabilities).forEach(([cap, enabled]) => {
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if (enabled) {
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dockerArgs.push(`--cap-add=${cap}`);
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}
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});
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// Add resource limits
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dockerArgs.push(
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'--memory', process.env.CLAUDE_CONTAINER_MEMORY_LIMIT || '2g',
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'--cpu-shares', process.env.CLAUDE_CONTAINER_CPU_SHARES || '1024',
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'--pids-limit', process.env.CLAUDE_CONTAINER_PIDS_LIMIT || '256'
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);
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}
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// Add container name
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dockerArgs.push('--name', containerName);
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// Add environment variables as separate arguments
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Object.entries(envVars)
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.filter(([_, value]) => value !== undefined && value !== '')
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.forEach(([key, value]) => {
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// Write complex values to files for safer handling
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if (key === 'COMMAND' && String(value).length > 500) {
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const crypto = require('crypto');
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const randomSuffix = crypto.randomBytes(16).toString('hex');
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const tmpFile = `/tmp/claude-command-${Date.now()}-${randomSuffix}.txt`;
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fsSync.writeFileSync(tmpFile, String(value), { mode: 0o600 }); // Secure file permissions
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dockerArgs.push('-e', `${key}=@${tmpFile}`);
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} else {
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dockerArgs.push('-e', `${key}=${String(value)}`);
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}
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});
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// Add the image name as the final argument
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dockerArgs.push(dockerImageName);
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// Create sanitized version for logging (remove sensitive values)
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const sanitizedCommand = dockerCommand.replace(/-e [A-Z_]+=".+?"/g, match => {
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// Extract the environment variable name, handling both quotes and command substitution
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const keyMatch = match.match(/-e ([A-Z_]+)=/);
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if (!keyMatch) return match;
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const envKey = keyMatch[1];
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const sensitiveSKeys = [
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'GITHUB_TOKEN',
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'ANTHROPIC_API_KEY',
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'AWS_ACCESS_KEY_ID',
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'AWS_SECRET_ACCESS_KEY',
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'AWS_SESSION_TOKEN'
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];
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if (sensitiveSKeys.includes(envKey)) {
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return `-e ${envKey}="[REDACTED]"`;
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const sanitizedArgs = dockerArgs.map(arg => {
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if (typeof arg !== 'string') return arg;
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// Check if this is an environment variable assignment
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const envMatch = arg.match(/^([A-Z_]+)=(.*)$/);
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if (envMatch) {
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const envKey = envMatch[1];
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const sensitiveSKeys = [
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'GITHUB_TOKEN',
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'ANTHROPIC_API_KEY',
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'AWS_ACCESS_KEY_ID',
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'AWS_SECRET_ACCESS_KEY',
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'AWS_SESSION_TOKEN'
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];
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if (sensitiveSKeys.includes(envKey)) {
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return `${envKey}=[REDACTED]`;
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}
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// For the command, also redact to avoid logging the full command
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if (envKey === 'COMMAND') {
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return `${envKey}=[COMMAND_CONTENT]`;
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}
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}
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// For the command, also redact to avoid logging the full command
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if (envKey === 'COMMAND') {
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return `-e ${envKey}="[COMMAND_CONTENT]"`;
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}
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return match;
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return arg;
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});
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try {
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logger.info({ dockerCommand: sanitizedCommand }, 'Executing Docker command');
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logger.info({ dockerArgs: sanitizedArgs }, 'Executing Docker command');
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// Clear any temporary command files after execution
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const cleanupTempFiles = () => {
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@@ -233,7 +299,11 @@ Please complete this task fully and autonomously.`;
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const containerLifetimeMs = parseInt(process.env.CONTAINER_LIFETIME_MS, 10) || 7200000; // 2 hours in milliseconds
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logger.info({ containerLifetimeMs }, 'Setting container lifetime');
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const result = await execAsync(dockerCommand, {
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// Use promisified version of child_process.execFile (safer than exec)
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const { promisify } = require('util');
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const execFileAsync = promisify(require('child_process').execFile);
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const result = await execFileAsync('docker', dockerArgs, {
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maxBuffer: 10 * 1024 * 1024, // 10MB buffer
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timeout: containerLifetimeMs // Container lifetime in milliseconds
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});
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@@ -322,6 +392,7 @@ Please complete this task fully and autonomously.`;
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envVars.AWS_SESSION_TOKEN
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].filter(val => val && val.length > 0);
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// Redact specific sensitive values first
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sensitiveValues.forEach(value => {
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if (value) {
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// Convert to string and escape regex special characters
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@@ -331,6 +402,20 @@ Please complete this task fully and autonomously.`;
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sanitized = sanitized.replace(new RegExp(escapedValue, 'g'), '[REDACTED]');
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}
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});
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// Then apply pattern-based redaction for any missed credentials
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const sensitivePatterns = [
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/AKIA[0-9A-Z]{16}/g, // AWS Access Key pattern
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/[a-zA-Z0-9/+=]{40}/g, // AWS Secret Key pattern
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/sk-[a-zA-Z0-9]{32,}/g, // API key pattern
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/github_pat_[a-zA-Z0-9_]{82}/g, // GitHub fine-grained token pattern
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/ghp_[a-zA-Z0-9]{36}/g // GitHub personal access token pattern
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];
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sensitivePatterns.forEach(pattern => {
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sanitized = sanitized.replace(pattern, '[REDACTED]');
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});
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return sanitized;
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};
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@@ -366,7 +451,7 @@ Please complete this task fully and autonomously.`;
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stderr: sanitizeOutput(error.stderr),
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stdout: sanitizeOutput(error.stdout),
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containerName,
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dockerCommand: sanitizedCommand
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dockerArgs: sanitizedArgs
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},
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'Error running Claude Code container'
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);
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@@ -406,6 +491,7 @@ Please complete this task fully and autonomously.`;
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stderr: sanitizedStderr,
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stdout: sanitizedStdout,
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containerName,
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dockerArgs: sanitizedArgs,
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repo: repoFullName,
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issue: issueNumber
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},
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@@ -429,8 +515,12 @@ Please complete this task fully and autonomously.`;
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/AWS_SECRET_ACCESS_KEY="[^"]+"/g,
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/AWS_SESSION_TOKEN="[^"]+"/g,
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/GITHUB_TOKEN="[^"]+"/g,
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/ANTHROPIC_API_KEY="[^"]+"/g,
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/AKIA[0-9A-Z]{16}/g, // AWS Access Key pattern
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/[a-zA-Z0-9/+=]{40}/g // AWS Secret Key pattern
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/[a-zA-Z0-9/+=]{40}/g, // AWS Secret Key pattern
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/sk-[a-zA-Z0-9]{32,}/g, // API key pattern
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/github_pat_[a-zA-Z0-9_]{82}/g, // GitHub fine-grained token pattern
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/ghp_[a-zA-Z0-9]{36}/g // GitHub personal access token pattern
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];
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sensitivePatterns.forEach(pattern => {
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243
test/unit/services/claudeService.test.js
Normal file
243
test/unit/services/claudeService.test.js
Normal file
@@ -0,0 +1,243 @@
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// Set up environment variables before requiring modules
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process.env.BOT_USERNAME = '@TestBot';
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process.env.NODE_ENV = 'test';
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process.env.GITHUB_TOKEN = 'ghp_test_token'; // Use token format that passes validation
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// Mock dependencies
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jest.mock('child_process', () => ({
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execFileSync: jest.fn().mockReturnValue('mocked output'),
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execFile: jest.fn(),
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exec: jest.fn()
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}));
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jest.mock('util', () => ({
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promisify: jest.fn((fn) => {
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if (fn.name === 'execFile') {
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return jest.fn().mockResolvedValue({
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stdout: 'Claude response from container',
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stderr: ''
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});
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}
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return fn;
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})
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}));
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jest.mock('fs', () => ({
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writeFileSync: jest.fn(),
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unlinkSync: jest.fn()
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}));
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jest.mock('../../../src/utils/logger', () => ({
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createLogger: () => ({
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info: jest.fn(),
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error: jest.fn(),
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warn: jest.fn(),
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debug: jest.fn()
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})
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}));
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jest.mock('../../../src/utils/sanitize', () => ({
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sanitizeBotMentions: jest.fn((input) => input)
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}));
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jest.mock('../../../src/utils/secureCredentials', () => ({
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get: jest.fn((key) => {
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if (key === 'GITHUB_TOKEN') return 'ghp_test_github_token_mock123456789012345678901234';
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if (key === 'ANTHROPIC_API_KEY') return 'sk-ant-test-anthropic-key12345678901234567890123456789';
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return null;
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})
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}));
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// Now require the module under test
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const { execFileSync, exec } = require('child_process');
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const { writeFileSync } = require('fs');
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const { promisify } = require('util');
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const { sanitizeBotMentions } = require('../../../src/utils/sanitize');
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const claudeService = require('../../../src/services/claudeService');
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describe('Claude Service', () => {
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beforeEach(() => {
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// Clear all mocks before each test
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jest.clearAllMocks();
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});
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test('processCommand should handle test mode correctly', async () => {
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// Force test mode
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process.env.NODE_ENV = 'test';
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const result = await claudeService.processCommand({
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repoFullName: 'test/repo',
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issueNumber: 123,
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command: 'Test command',
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isPullRequest: false
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});
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// Verify test mode response
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expect(result).toContain('Hello! I\'m Claude responding to your request.');
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expect(result).toContain('test/repo');
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expect(sanitizeBotMentions).toHaveBeenCalled();
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// Verify no Docker commands were executed
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expect(execFileSync).not.toHaveBeenCalled();
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});
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test('processCommand should properly set up Docker command in production mode', async () => {
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// Mock for this test only
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const originalProcessCommand = claudeService.processCommand;
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// Override the actual function with a test implementation
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claudeService.processCommand = async (options) => {
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// Set production mode for this function
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const originalNodeEnv = process.env.NODE_ENV;
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process.env.NODE_ENV = 'production';
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// Mock dependencies needed in production mode
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execFileSync.mockImplementation((cmd, args, options) => {
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if (args[0] === 'inspect') return '{}';
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return 'mocked output';
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});
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// Configure execFileAsync mock
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const execFileAsync = promisify(require('child_process').execFile);
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execFileAsync.mockResolvedValue({
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stdout: 'Claude response from container',
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stderr: ''
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});
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// Call the original implementation to test it
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const result = await originalProcessCommand(options);
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// Restore env
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process.env.NODE_ENV = originalNodeEnv;
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return result;
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};
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try {
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// Call the overridden function
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await claudeService.processCommand({
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repoFullName: 'test/repo',
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issueNumber: 123,
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command: 'Test command',
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isPullRequest: false
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});
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// Our assertions happen in the override function
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// We just need to verify the execFileSync was called
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expect(execFileSync).toHaveBeenCalled();
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} finally {
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// Restore the original function
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claudeService.processCommand = originalProcessCommand;
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}
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});
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test('processCommand should handle errors properly', async () => {
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// Save original function for restoration
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const originalProcessCommand = claudeService.processCommand;
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// Create a testing implementation
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claudeService.processCommand = async (options) => {
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// Set test environment variables
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const originalNodeEnv = process.env.NODE_ENV;
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process.env.NODE_ENV = 'production';
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// Mock the Docker inspect to succeed
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execFileSync.mockImplementation((cmd, args, options) => {
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if (args[0] === 'inspect') return '{}';
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if (args[0] === 'logs') return 'error logs';
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if (args[0] === 'kill') return '';
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return 'mocked output';
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});
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// Mock execFileAsync to throw an error
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const execFileAsync = promisify(require('child_process').execFile);
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execFileAsync.mockRejectedValue({
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message: 'Docker execution failed',
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stderr: 'Error: container exited with non-zero status',
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stdout: ''
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});
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// Throw error from original implementation
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await originalProcessCommand(options);
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// Restore environment
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process.env.NODE_ENV = originalNodeEnv;
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};
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try {
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// Call the function and expect it to throw
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await expect(claudeService.processCommand({
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repoFullName: 'test/repo',
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issueNumber: 123,
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command: 'Test command',
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isPullRequest: false
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})).rejects.toThrow();
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// Verify execFileSync was called
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expect(execFileSync).toHaveBeenCalled();
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} finally {
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// Restore original function
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claudeService.processCommand = originalProcessCommand;
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}
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});
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test('processCommand should write long commands to temp files', async () => {
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// Save original function for restoration
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const originalProcessCommand = claudeService.processCommand;
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// Create a testing implementation that checks for file writing
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claudeService.processCommand = async (options) => {
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// Set up test environment
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const originalNodeEnv = process.env.NODE_ENV;
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process.env.NODE_ENV = 'production';
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// Mock the Docker inspect to succeed
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execFileSync.mockImplementation((cmd, args, options) => {
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if (args[0] === 'inspect') return '{}';
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return 'mocked output';
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});
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// Make sure our original command is accessible
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const longCommand = options.command;
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// Capture file write calls
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let capturedFilePath = null;
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writeFileSync.mockImplementation((path, content, options) => {
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capturedFilePath = path;
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});
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// Call the original implementation
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try {
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await originalProcessCommand(options);
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} catch (e) {
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// Ignore errors, we just want to check if writeFileSync was called
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}
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// Verify temp file creation occurred
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expect(writeFileSync).toHaveBeenCalled();
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// Restore environment
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process.env.NODE_ENV = originalNodeEnv;
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return 'test response';
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};
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try {
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// Call the function with a long command
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const longCommand = 'A'.repeat(1000);
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await claudeService.processCommand({
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repoFullName: 'test/repo',
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issueNumber: 123,
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command: longCommand,
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isPullRequest: false
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});
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// Verification happens in the override function
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expect(writeFileSync).toHaveBeenCalled();
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} finally {
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// Restore original function
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claudeService.processCommand = originalProcessCommand;
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}
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||||
});
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||||
});
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||||
Reference in New Issue
Block a user