MEDIUM 4.3
GHSA-jp5v-5gx4-jmj9
Ability to forge per-form CSRF tokens in Rails
Details
It is possible to, given a global CSRF token such as the one present in the authenticity_token meta tag, forge a per-form CSRF token for any action for that session.
Impact ------
Given the ability to extract the global CSRF token, an attacker would be able to construct a per-form CSRF token for that session.
Workarounds -----------
This is a low-severity security issue. As such, no workaround is necessarily until such time as the application can be upgraded.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-8166 [ADVISORY]
- https://hackerone.com/reports/732415 [WEB]
- https://github.com/rails/rails [PACKAGE]
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2020-8166.yml [WEB]
- https://groups.google.com/forum/#!topic/rubyonrails-security/NOjKiGeXUgw [WEB]
- https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw [WEB]
- https://www.debian.org/security/2020/dsa-4766 [WEB]