CVE-2020-8163

Description

The is a code injection vulnerability in versions of Rails prior to 5.0.1 that wouldallow an attacker who controlled the `locals` argument of a `render` call to perform a RCE.

CVSS Metrics

• v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 6.5AV:N/AC:L/Au:S/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 91.07%• Percentile: 100%

Techniques & Countermeasures

• CWE-94•Improper Control of Generation of Code ('Code Injection')

  The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Affected Systems

• debian•debian_linux

  9.0

• rubyonrails•rails

  < 5.0.1

References (4)

• https://hackerone.com/reports/304805
• https://groups.google.com/g/rubyonrails-security/c/hWuKcHyoKh0
• https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html
• http://packetstormsecurity.com/files/158604/Ruby-On-Rails-5.0.1-Remote-Code-Execution.html