| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4766-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| rails (PTS) | buster | 2:5.2.2.1+dfsg-1+deb10u3 | fixed |
| buster (security) | 2:5.2.2.1+dfsg-1+deb10u5 | fixed |
| bullseye (security), bullseye | 2:6.0.3.7+dfsg-2+deb11u2 | fixed |
| bookworm | 2:6.1.7.3+dfsg-1 | fixed |
| sid, trixie | 2:6.1.7.3+dfsg-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| rails | source | jessie | (not affected) | | | |
| rails | source | stretch | (not affected) | | | |
| rails | source | buster | 2:5.2.2.1+dfsg-1+deb10u2 | | DSA-4766-1 | |
| rails | source | (unstable) | 2:5.2.4.3+dfsg-1 | | | |
Notes
[stretch] - rails <not-affected> (Vulnerable code introduced later)
[jessie] - rails <not-affected> (Vulnerable code introduced later)
https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released
https://github.com/rails/rails/commit/d124f19287f4892c72ca54da728a781591c6fca1 (5.2)
per-form CSRF token introduced in 5.x: https://github.com/rails/rails/commit/3e98819e20bc113343d4d4c0df614865ad5a9d3a