Ability to forge per-form CSRF tokens in Rails
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-8166US | medium4.3 | — | ||
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… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/rails/railsPACKAGE
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2020-8166.ymlWEB
- https://groups.google.com/forum/#!topic/rubyonrails-security/NOjKiGeXUgwWEB
- https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgwWEB
- https://hackerone.com/reports/732415WEB
- https://nvd.nist.gov/vuln/detail/CVE-2020-8166ADVISORY
- https://www.debian.org/security/2020/dsa-4766WEB
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