CVE-2021-32802
CVSS V2 High 10
CVSS V3 Critical 9.8
Description
Nextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some image types, the Nextcloud server was invoking a third-party library that wasn't suited for untrusted user-supplied content. There are several security concerns with passing user-generated content to this library, such as Server-Side-Request-Forgery, file disclosure or potentially executing code on the system. The risk depends on your system configuration and the installed library version. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. These versions do not use this library anymore. As a workaround users may disable previews by setting `enable_previews` to `false` in `config.php`.
Overview
- CVE ID
- CVE-2021-32802
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-09-07T22:15:08
- Last Modified Date
- 2022-09-27T14:16:07
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | 1 | OR | 20.0.12 | |
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | 1 | OR | 21.0.0 | 21.0.4 |
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* | 1 | OR | 22.0.0 | 22.1.0 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:C/I:C/A:C
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 10
- Severity
- HIGH
- Exploitability Score
- 10
- Impact Score
- 10
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 9.8
- Base Severity
- CRITICAL
- Exploitability Score
- 3.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://docs.nextcloud.com/server/21/admin_manual/configuration_files/previews_configuration.html#disabling-previews | Vendor Advisory |
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7 | Mitigation Third Party Advisory |
| https://hackerone.com/reports/1261413 | 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-2021-32802 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32802 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:05:28 | Added to TrackCVE | |||
| 2022-12-05 09:48:40 | 2021-09-07T22:15Z | 2021-09-07T22:15:08 | CVE Published Date | updated |
| 2022-12-05 09:48:40 | 2022-09-27T14:16:07 | CVE Modified Date | updated | |
| 2022-12-05 09:48:40 | Analyzed | Vulnerability Status | updated | |
| 2022-12-05 09:48:45 | References | updated |