CVE-2021-22902
Description
The actionpack ruby gem (a framework for handling and responding to web requests in Rails) before 6.0.3.7, 6.1.3.2 suffers from a possible denial of service vulnerability in the Mime type parser of Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 14.1.0-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2:6.0.3.7+dfsg-1 |
| sid | Fixed | 2:6.0.3.7+dfsg-1 |
| forky | Fixed | 2:6.0.3.7+dfsg-1 |
| bullseye | Fixed | 2:6.0.3.7+dfsg-1 |
| bookworm | Fixed | 2:6.0.3.7+dfsg-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | actionpack | !< 6.0.0||<~> 6.0.3, >= 6.0.3.7 | ~> 6.0.3, >= 6.0.3.7 |
| RubyGems | actionpack | >=6.0.0,<6.0.3.7 | 6.0.3.7 |
| RubyGems | actionpack | >=6.1.0,<6.1.3.2 | 6.1.3.2 |
References
- https://groups.google.com/g/rubyonrails-security/c/_5ID_ld9u1c
- https://www.suse.com/security/cve/CVE-2021-22902.html
- https://nvd.nist.gov/vuln/detail/CVE-2021-22902
- https://hackerone.com/reports/1138654
- https://discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866
- https://github.com/rails/rails/releases/tag/v6.0.3.7
- https://github.com/rails/rails/releases/tag/v6.1.3.2
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-22902.yml
- https://security-tracker.debian.org/tracker/CVE-2021-22902
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.