CVE-2020-8166

Description

A CSRF forgery vulnerability exists in rails < 5.2.5, rails < 6.0.4 that makes it possible for an attacker to, given a global CSRF token such as the one present in the authenticity_token meta tag, forge a per-form CSRF token.

CVSS Metrics

• v3.1•MEDIUM•Score: 4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
• v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.44%• Percentile: 64%

Techniques & Countermeasures

• CWE-352•Cross-Site Request Forgery (CSRF)

  The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

Affected Systems

• debian•debian_linux

  10.0

• rubyonrails•rails

  < 5.2.4.3 | ≥ 6.0.0, < 6.0.3.1

References (3)

• https://hackerone.com/reports/732415
• https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw
• https://www.debian.org/security/2020/dsa-4766