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`.
References
Link | Resource |
---|---|
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 |
Configurations
Configuration 1 (hide)
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History
No history.
Information
Published : 2021-09-07 22:15
Updated : 2024-02-28 18:28
NVD link : CVE-2021-32802
Mitre link : CVE-2021-32802
CVE.ORG link : CVE-2021-32802
JSON object : View
Products Affected
nextcloud
- nextcloud_server
CWE
CWE-829
Inclusion of Functionality from Untrusted Control Sphere