CVE-2021-32656
CVSS V2 Medium 5
CVSS V3 High 8.6
Description
Nextcloud Server is a Nextcloud package that handles data storage. A vulnerability in federated share exists in versions prior to 19.0.11, 20.0.10, and 21.0.2. An attacker can gain access to basic information about users of a server by accessing a public link that a legitimate server user added as a federated share. This happens because Nextcloud supports sharing registered users with other Nextcloud servers, which can be done automatically when selecting the "Add server automatically once a federated share was created successfully" setting. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2 As a workaround, disable "Add server automatically once a federated share was created successfully" in the Nextcloud settings.
Overview
- CVE ID
- CVE-2021-32656
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-06-01T22:15:08
- Last Modified Date
- 2022-10-25T15:47:11
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | 1 | OR | 19.0.11 | |
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | 1 | OR | 20.0.0 | 20.0.10 |
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | 1 | OR | 21.0.0 | 21.0.2 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 8.6
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 4
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j875-vr2q-h6x6 | Third Party Advisory |
| https://hackerone.com/reports/1167853 | Permissions Required Third Party Advisory |
| https://security.gentoo.org/glsa/202208-17 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-32656 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32656 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:11:59 | Added to TrackCVE | |||
| 2022-12-05 03:23:45 | 2021-06-01T22:15Z | 2021-06-01T22:15:08 | CVE Published Date | updated |
| 2022-12-05 03:23:45 | 2022-10-25T15:47:11 | CVE Modified Date | updated | |
| 2022-12-05 03:23:45 | Analyzed | Vulnerability Status | updated | |
| 2022-12-05 03:23:49 | References | updated |