Vulnerability in Rack
CVE-2023-27539
There is a denial of service vulnerability in the header parsing component of Rack.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.011 (63.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Rack
- Rails Rack — versions 2.2.6.4, 3.0.6.1
- Debian Linux — versions 10.0, 11.0
Public proof-of-concept exploits
References
- discuss.rubyonrails.org/t/cve-2023-27539-possible-denial-of-service-vulnerabili… (Vendor Advisory)
- github.com/advisories/GHSA-c6qg-cjj8-47qp (Patch, Third Party Advisory)
- github.com/rack/rack/commit/231ef369ad0b542575fb36c74fcfcfabcf6c530c (Patch)
- github.com/rack/rack/commit/ee7919ea04303717858be1c3f16b406adc6d8cff (Patch)
- lists.debian.org/debian-lts-announce/2023/04/msg00017.html (Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20231208-0016/ (Third Party Advisory)
- www.debian.org/security/2023/dsa-5530 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-27539?
- CVE-2023-27539 is a medium-severity vulnerability in Rack. CVSS score: 5.3/10. Published 2025-01-09.
- How severe is CVE-2023-27539?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-27539 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.