CVE-2019-6474

A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2

CVSS v3 6.5 MEDIUM
CVSS v2.0 6.1 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

6.1^/10

CVSS v2.0 : MEDIUM

Vector : AV:A/AC:L/Au:N/C:N/I:N/A:C

Exploitability : 6.5 / Impact : 6.9

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://kb.isc.org/docs/cve-2019-6474	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:isc:kea::::::::
	cpe:2.3:a:isc:kea:1.6.0:beta1::::::
	cpe:2.3:a:isc:kea:1.6.0:beta2::::::

History

No history.

Information

Published : 2019-10-16 18:15

Updated : 2024-02-28 17:28

NVD link : CVE-2019-6474

Mitre link : CVE-2019-6474

CVE.ORG link : CVE-2019-6474

JSON object : View

Products Affected

isc

kea

CWE

CWE-772

Missing Release of Resource after Effective Lifetime

{"id": "CVE-2019-6474", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.1, "accessVector": "ADJACENT_NETWORK", "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 6.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 6.5, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "security-officer@isc.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.7, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.1}]}, "published": "2019-10-16T18:15:37.217", "references": [{"url": "https://kb.isc.org/docs/cve-2019-6474", "tags": ["Vendor Advisory"], "source": "security-officer@isc.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-772"}]}], "descriptions": [{"lang": "en", "value": "A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2"}, {"lang": "es", "value": "Una falta de comprobaci\u00f3n en las peticiones de clientes entrantes puede ser explotadas para causar una situaci\u00f3n en la que el almacenamiento arrendado del servidor Kea contiene arrendamientos que son rechazados como no v\u00e1lidos cuando el servidor intenta cargar arrendamientos del almacenamiento al reiniciar. Si el n\u00famero de tales arrendamientos excede un l\u00edmite codificado en el c\u00f3digo Kea, un servidor que intente reiniciar concluir\u00e1 que existe un problema con su almac\u00e9n de arrendamientos y se dar\u00e1 por vencido. Versiones afectadas: 1.4.0 hasta 1.5.0, 1.6.0-beta1 y 1.6.0-beta2"}], "lastModified": "2020-08-24T17:37:01.140", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "27BBC7E1-37AF-4BC6-BA53-09CF7B8921BB", "versionEndIncluding": "1.5.0", "versionStartIncluding": "1.4.0"}, {"criteria": "cpe:2.3:a:isc:kea:1.6.0:beta1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "43793833-7D0F-4C7C-80B4-F8563AD23607"}, {"criteria": "cpe:2.3:a:isc:kea:1.6.0:beta2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AECDE26A-DDFD-4035-A08E-E7A5CA37F1E8"}], "operator": "OR"}]}], "sourceIdentifier": "security-officer@isc.org"}