CVE-2021-32802 (GCVE-0-2021-32802)
Vulnerability from cvelistv5
Published
2021-09-07 21:45
Modified
2024-08-03 23:33
Severity ?
9.3 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Summary
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
security-advisories@github.comhttps://docs.nextcloud.com/server/21/admin_manual/configuration_files/previews_configuration.html#disabling-previewsVendor Advisory
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7Mitigation, Third Party Advisory
security-advisories@github.comhttps://hackerone.com/reports/1261413Permissions Required, Third Party Advisory
security-advisories@github.comhttps://security.gentoo.org/glsa/202208-17Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://docs.nextcloud.com/server/21/admin_manual/configuration_files/previews_configuration.html#disabling-previewsVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/1261413Permissions Required, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202208-17Third Party Advisory
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 20.0.12
Version: >= 21.0.0, < 21.0.4
Version: >= 22.0.0, < 22.1.0
 Create a notification for this product.
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}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.