CVE-2021-41179

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

25/10/2021

Last modified:

29/10/2021

Description

Nextcloud is an open-source, self-hosted productivity platform. Prior to Nextcloud Server versions 20.0.13, 21.0.5, and 22.2.0, the Two-Factor Authentication wasn&#39;t enforced for pages marked as public. Any page marked as `@PublicPage` could thus be accessed with a valid user session that isn&#39;t authenticated. This particularly affects the Nextcloud Talk application, as this could be leveraged to gain access to any private chat channel without going through the Two-Factor flow. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x

6.50

Severity 3.x

MEDIUM

Vector 2.0

AV:N/AC:L/Au:S/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 4.00 MEDIUM
Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0

4.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:nextcloud:server::::::::	20.0.3 (including)	20.0.13 (excluding)
cpe:2.3:a:nextcloud:server::::::::	21.0.1 (including)	21.0.5 (excluding)
cpe:2.3:a:nextcloud:server::::::::	22.1.1 (including)	22.2.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-41179

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools