CVE-2019-5420: Improper Input Validation

March 27, 2019 (updated October 9, 2019)

A remote code execution vulnerability in development mode Rails can allow an attacker to guess the automatically generated development mode secret token. This secret token can be used in combination with other Rails internals to escalate to a remote code execution exploit.

References

packetstormsecurity.com/files/152704/Ruby-On-Rails-DoubleTap-Development-Mode-secret_key_base-Remote-Code-Execution.html
nvd.nist.gov/vuln/detail/CVE-2019-5420
weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/
www.exploit-db.com/exploits/46785/

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