Senior LevelNode JS
How does the experimental Node.js Permission Model (--permission) sandbox file and process access?
❓ Interview Prompt: Explain Node.js Permission Model, `--permission` flag, `--allow-fs-read`, `--allow-fs-write`, `--allow-child-process`, and preventing supply chain attacks.
Node 20+ introduces an experimental Permission Model ('--permission') that restricts what resources the Node.js process can access at runtime:
Security Flags:
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'--allow-fs-read=/tmp/': Restricts file reading to '/tmp/' directory.
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'--allow-fs-write=/var/log/': Restricts file writing to log directory.
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'--allow-child-process': Grants or revokes permission to spawn child processes.
Benefit: Prevents malicious compromised 'npm' dependencies from stealing SSH keys or reading '/etc/passwd'!
Code Implementation Example
bash
# Run Node.js with strict file reading permissions sandbox
node --permission --allow-fs-read=/var/www/app/ server.js💡Running Node.js with the experimental Permission Model sandbox flags.
🎯 Interview Key Takeaway
Use the Node.js Permission Model (--permission) to sandbox process capabilities and defend against supply chain attacks.
#Permission Model#Security#Sandbox#Supply Chain#Senior
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