CVE-2021-32688

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Summary

CVECVE-2021-32688
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-07-12 14:15:00 UTC
Updated2023-11-07 03:35:00 UTC
DescriptionNextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server supports application specific tokens for authentication purposes. These tokens are supposed to be granted to a specific applications (e.g. DAV sync clients), and can also be configured by the user to not have any filesystem access. Due to a lacking permission check, the tokens were able to change their own permissions in versions prior to 19.0.13, 20.0.11, and 21.0.3. Thus fileystem limited tokens were able to grant themselves access to the filesystem. The issue is patched in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds aside from upgrading.

Risk And Classification

Problem Types: CWE-285

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 33 All All All
Operating System Fedoraproject Fedora 34 All All All
Application Nextcloud Nextcloud Server All All All All

References

ReferenceSourceLinkTags
[SECURITY] Fedora 34 Update: nextcloud-20.0.11-1.fc34 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
Harden apptoken check by rullzer · Pull Request #27000 · nextcloud/server · GitHub MISC github.com
Nextcloud: Multiple Vulnerabilities (GLSA 202208-17) — Gentoo security GENTOO security.gentoo.org
Application specific tokens can change their own scope · Advisory · nextcloud/security-advisories · GitHub CONFIRM github.com
[SECURITY] Fedora 33 Update: nextcloud-19.0.13-1.fc33 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
HackerOne MISC hackerone.com
[SECURITY] Fedora 33 Update: nextcloud-19.0.13-1.fc33 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 34 Update: nextcloud-20.0.11-1.fc34 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 281735 Fedora Security Update for nextcloud (FEDORA-2021-9b421b78af)
  • 281736 Fedora Security Update for nextcloud (FEDORA-2021-6f327296fe)
  • 710590 Gentoo Linux Nextcloud Multiple Vulnerabilities (GLSA 202208-17)
  • 750849 OpenSUSE Security Update for nextcloud (openSUSE-SU-2021:1068-1)
  • 750850 OpenSUSE Security Update for nextcloud (openSUSE-SU-2021:1068-1)
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