CVE-2023-27539

There is a denial of service vulnerability in the header parsing component of Rack.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://discuss.rubyonrails.org/t/cve-2023-27539-possible-denial-of-service-vulnerability-in-racks-header-parsing/82466	Vendor Advisory
https://github.com/advisories/GHSA-c6qg-cjj8-47qp	Third Party Advisory Patch
https://github.com/rack/rack/commit/231ef369ad0b542575fb36c74fcfcfabcf6c530c	Patch
https://github.com/rack/rack/commit/ee7919ea04303717858be1c3f16b406adc6d8cff	Patch
https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20231208-0016/	Third Party Advisory
https://www.debian.org/security/2023/dsa-5530	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:rack:rack::::::ruby::*
	cpe:2.3:a:rack:rack::::::ruby::*

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:10.0:::::::*
	cpe:2.3:o:debian:debian_linux:11.0:::::::*

History

No history.

Information

Published : 2025-01-09 01:15

Updated : 2025-10-10 16:31

NVD link : CVE-2023-27539

Mitre link : CVE-2023-27539

CVE.ORG link : CVE-2023-27539

JSON object : View

Products Affected

debian

debian_linux

rack

rack

CWE

NVD-CWE-noinfo

{"id": "CVE-2023-27539", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "[email protected]", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2025-01-09T01:15:07.483", "references": [{"url": "https://discuss.rubyonrails.org/t/cve-2023-27539-possible-denial-of-service-vulnerability-in-racks-header-parsing/82466", "tags": ["Vendor Advisory"], "source": "[email protected]"}, {"url": "https://github.com/advisories/GHSA-c6qg-cjj8-47qp", "tags": ["Third Party Advisory", "Patch"], "source": "[email protected]"}, {"url": "https://github.com/rack/rack/commit/231ef369ad0b542575fb36c74fcfcfabcf6c530c", "tags": ["Patch"], "source": "[email protected]"}, {"url": "https://github.com/rack/rack/commit/ee7919ea04303717858be1c3f16b406adc6d8cff", "tags": ["Patch"], "source": "[email protected]"}, {"url": "https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "[email protected]"}, {"url": "https://security.netapp.com/advisory/ntap-20231208-0016/", "tags": ["Third Party Advisory"], "source": "[email protected]"}, {"url": "https://www.debian.org/security/2023/dsa-5530", "tags": ["Mailing List", "Third Party Advisory"], "source": "[email protected]"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "There is a denial of service vulnerability in the header parsing component of Rack."}, {"lang": "es", "value": "Existe una vulnerabilidad de denegaci\u00f3n de servicio en header parsing component de Rack."}], "lastModified": "2025-10-10T16:31:34.173", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "C8C60AD6-206D-4111-91A4-99359E29BFE0", "versionEndExcluding": "2.2.6.4", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "947A74FA-86B2-47DA-8477-ADA81EC19966", "versionEndExcluding": "3.0.6.1", "versionStartIncluding": "3.0.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}, {"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"}], "operator": "OR"}]}], "sourceIdentifier": "[email protected]"}