CVE-2021-32741

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the public share link mount endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.

CVSS v3 5.3 MEDIUM
CVSS v2.0 5.0 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 LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-crvj-vmf7-xrvr	Third Party Advisory
https://github.com/nextcloud/server/pull/26958	Patch Third Party Advisory
https://hackerone.com/reports/1192144	Permissions Required

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nextcloud:nextcloud_server::::::::
	cpe:2.3:a:nextcloud:nextcloud_server::::::::
	cpe:2.3:a:nextcloud:nextcloud_server::::::::

History

No history.

Information

Published : 2021-07-12 22:15

Updated : 2021-07-14 15:06

NVD link : CVE-2021-32741

Mitre link : CVE-2021-32741

CVE.ORG link : CVE-2021-32741

JSON object : View

Products Affected

nextcloud

nextcloud_server

CWE

NVD-CWE-Other CWE-799

Improper Control of Interaction Frequency

{"id": "CVE-2021-32741", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "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}, {"type": "Secondary", "source": "security-advisories@github.com", "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:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2021-07-12T22:15:07.993", "references": [{"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-crvj-vmf7-xrvr", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/nextcloud/server/pull/26958", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://hackerone.com/reports/1192144", "tags": ["Permissions Required"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}, {"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-799"}]}], "descriptions": [{"lang": "en", "value": "Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the public share link mount endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds."}, {"lang": "es", "value": "Nextcloud Server es un paquete de Nextcloud que maneja el almacenamiento de datos. En versiones anteriores a 19.0.13, 20.011 y 21.0.3, se presenta una falta de l\u00edmite de velocidad en el endpoint de montaje del enlace p\u00fablico. Esto podr\u00eda haber permitido a un atacante enumerar tokens de recursos compartidos potencialmente v\u00e1lidos. El problema se ha corregido en las versiones 19.0.13, 20.0.11 y 21.0.3. No hay soluciones conocidas"}], "lastModified": "2021-07-14T15:06:37.937", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7D4E2A1A-C03E-4B91-87B6-6A8652B284F7", "versionEndExcluding": "19.0.13"}, {"criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9CF8A48F-A16D-4C5F-B098-F92F3D361FA9", "versionEndExcluding": "20.0.11", "versionStartIncluding": "20.0.0"}, {"criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D490C8D8-910E-44A1-9A8E-2F892D35D6CF", "versionEndExcluding": "21.0.3", "versionStartIncluding": "21.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}