CWE
330 77
Advisory Published
Updated

CVE-2019-5420: Command Injection

First published: Wed Mar 27 2019(Updated: )

A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 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.

Credit: support@hackerone.com

Affected SoftwareAffected VersionHow to fix
Rubyonrails Rails<5.2.2.1
Rubyonrails Rails=6.0.0-beta1
Rubyonrails Rails=6.0.0-beta2
Debian Debian Linux=8.0
Fedoraproject Fedora=30

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Frequently Asked Questions

  • What is CVE-2019-5420?

    CVE-2019-5420 is a remote code execution vulnerability in development mode Rails <5.2.2.1 <6.0.0.beta3.

  • What is the severity of CVE-2019-5420?

    The severity of CVE-2019-5420 is critical with a CVSS score of 9.8.

  • How does CVE-2019-5420 work?

    CVE-2019-5420 allows an attacker to guess the automatically generated development mode secret token and use it to escalate to a remote code execution exploit.

  • Which versions of Ruby on Rails are affected by CVE-2019-5420?

    Ruby on Rails versions prior to 5.2.2.1 and 6.0.0.beta3 are affected by CVE-2019-5420.

  • How can I fix CVE-2019-5420?

    To fix CVE-2019-5420, update Ruby on Rails to version 5.2.2.1 or later, or 6.0.0.beta3 or later.

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