GHSA-844m-cpr9-jcmh
Rails Multisite secure/signed cookies share secrets between sites in a multi-site application
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| RubyGems | rails_multisite | < 4.0.0 | 4.0.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
This vulnerability impacts any Rails applications using `rails_multisite` alongside Rails' signed/encrypted cookies. Depending on how the application makes use of these cookies, it may be possible for an attacker to re-use cookies on different 'sites' within a multi-site Rails application.
### Patches
The issue has been patched in v4 of the `rails_multisite` gem. Note that this upgrade will invalidate all previous signed/encrypted cookies. The impact of this invalidation will vary based on the application architecture.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/discourse/rails_multisite/security/advisories/GHSA-844m-cpr9-jcmh
- https://nvd.nist.gov/vuln/detail/CVE-2021-41263
- https://github.com/discourse/rails_multisite/commit/c6785cdb5c9277dd2c5ac8d55180dd1ece440ed0
- https://github.com/discourse/rails_multisite
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rails_multisite/CVE-2021-41263.yml