There is a denial of service vulnerability in the header parsing component of Rack.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-3392-1 ruby-rack security update
Debian DSA Debian DSA DSA-5530-1 ruby-rack security update
Github GHSA Github GHSA GHSA-c6qg-cjj8-47qp Possible Denial of Service Vulnerability in Rack's header parsing
Ubuntu USN Ubuntu USN USN-6689-1 Rack vulnerabilities
Ubuntu USN Ubuntu USN USN-6905-1 Rack vulnerabilities
Ubuntu USN Ubuntu USN USN-7036-1 Rack vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 10 Oct 2025 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Debian
Debian debian Linux
Rack
Rack rack
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Vendors & Products Debian
Debian debian Linux
Rack
Rack rack

Thu, 09 Jan 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Thu, 09 Jan 2025 01:00:00 +0000

Type Values Removed Values Added
Description A denial of service vulnerability was found in rubygem-rack in how it parses headers. A carefully crafted input can cause header parsing to take an unexpected amount of time, possibly resulting in a denial of service. There is a denial of service vulnerability in the header parsing component of Rack.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2025-01-09T21:24:51.396Z

Reserved: 2023-03-02T17:14:03.403Z

Link: CVE-2023-27539

cve-icon Vulnrichment

Updated: 2025-01-09T21:24:44.958Z

cve-icon NVD

Status : Analyzed

Published: 2025-01-09T01:15:07.483

Modified: 2025-10-10T16:31:34.173

Link: CVE-2023-27539

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-03-15T00:00:00Z

Links: CVE-2023-27539 - Bugzilla

cve-icon OpenCVE Enrichment

No data.