CVE-2024-26146
Possible Denial of Service Vulnerability in Rack Header Parsing
MEDIUM 5.3
At a glance
- Source
- NVD
- EPSS
- EPSS 2.00 % · percentile 81 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Analyzed
Description
Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected resulting in a possible denial of service issue. Accept and Forwarded headers are impacted. Ruby 3.2 has mitigations for this problem, so Rack applications using Ruby 3.2 or newer are unaffected. This vulnerability is fixed in 2.0.9.4, 2.1.4.4, 2.2.8.1, and 3.0.9.1.
Weaknesses (CWE)
- CWE-1333 — Inefficient Regular Expression Complexity (ReDoS)
References
- https://github.com/rack/rack/security/advisories/GHSA-54rr-7fvw-6x8f
- https://github.com/rack/rack/commit/30b8e39a578b25d4bdcc082c1c52c6f164b59716
- https://github.com/rack/rack/commit/6c5d90bdcec0949f7ba06db62fb740dab394b582
- https://github.com/rack/rack/commit/a227cd793778c7c3a827d32808058571569cda6f
- https://github.com/rack/rack/commit/e4c117749ba24a66f8ec5a08eddf68deeb425ccd
- https://discuss.rubyonrails.org/t/possible-denial-of-service-vulnerability-in-rack-header-parsing/84942
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-26146.yml
- https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html
- https://security.netapp.com/advisory/ntap-20240510-0006/
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | GitHub_M |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-54rr-7fvw-6x8f — Rack Header Parsing leads to Possible Denial of Service Vulnerability
European references
- ENISA EUVD · EUVD-2024-0516
- GCVE · GCVE-0-2024-26146
CERT-FR advisories
- CERTFR-2025-AVI-1129 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0969 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0160 — Multiples vulnérabilités dans Ruby on Rails · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*≥ 0.4 < 2.0.9.4cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*≥ 2.1.0 < 2.1.4.4cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*≥ 2.2.0 < 2.2.8.1cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| rack · rack | affected >= 3.0.0, < 3.0.9.1 ; affected >= 2.2.0, < 2.2.8.1 ; affected >= 2.1.0, < 2.1.4.4 ; affected < 2.0.9.4 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |