CVE-2021-41177

Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, Nextcloud Server did not implement a database backend for rate-limiting purposes. Any component of Nextcloud using rate-limits (as as `AnonRateThrottle` or `UserRateThrottle`) was thus not rate limited on instances not having a memory cache backend configured. In the case of a default installation, this would notably include the rate-limits on the two factor codes. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5, or 22.2.0. As a workaround, enable a memory cache backend in `config.php`.

CVSS v3.0 8.1 HIGH
CVSS v2.0 5.5 MEDIUM

8.1^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.5^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fj39-4qx4-m3f2	Third Party Advisory
https://hackerone.com/reports/1265709	Permissions Required Third Party Advisory
https://github.com/nextcloud/server/pull/28728	Patch Third Party Advisory
https://security.gentoo.org/glsa/202208-17	Third Party Advisory

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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::::::::

Information

Published : 2021-10-25 15:15

Updated : 2022-10-26 08:26

NVD link : CVE-2021-41177

Mitre link : CVE-2021-41177

JSON object : View

CWE

CWE-799

Improper Control of Interaction Frequency

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Products Affected

nextcloud

nextcloud_server

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