Resource exhaustion in Rubyonrails Rails
CVE-2021-22904
The actionpack ruby gem before 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 suffers from a possible denial of service vulnerability in the Token Authentication logic in Action Controller due to a too permissive regular expression. Impacted code uses `authenticate_or_request_with_http_token` or `authenticate_with_http_token` for request authentication.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.049 (92.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.050 · newest: 0.049 · change: -0.001
Affected products
- Rubyonrails Rails
- Https://github.com/rails/rails — versions Fixed in 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/1101125 (Permissions Required, Third Party Advisory)
- discuss.rubyonrails.org/t/cve-2021-22904-possible-dos-vulnerability-in-action-c… (Exploit, Patch, Mitigation, Vendor Advisory)
- security.netapp.com/advisory/ntap-20210805-0009/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22904?
- CVE-2021-22904 is a high-severity vulnerability in Rubyonrails Rails, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-06-11.
- How severe is CVE-2021-22904?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-22904 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.