CVE-2021-32766

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Summary

CVECVE-2021-32766
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-09-07 21:15:00 UTC
Updated2022-09-27 15:43:00 UTC
DescriptionNextcloud Text is an open source plaintext editing application which ships with the nextcloud server. In affected versions the Nextcloud Text application returned different error messages depending on whether a folder existed in a public link share. This is problematic in case the public link share has been created with "Upload Only" privileges. (aka "File Drop"). A link share recipient is not expected to see which folders or files exist in a "File Drop" share. Using this vulnerability an attacker is able to enumerate folders in such a share. Exploitation requires that the attacker has access to a valid affected "File Drop" link share. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.0.1. Users who are unable to upgrade are advised to disable the Nextcloud Text application in the app settings.

Risk And Classification

Problem Types: CWE-209

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Nextcloud Nextcloud All All All All
Application Nextcloud Nextcloud Server All All All All

References

ReferenceSourceLinkTags
HackerOne MISC hackerone.com
Unify error responses and add logging where appropriate by juliushaertl · Pull Request #1716 · nextcloud/text · GitHub MISC github.com
Nextcloud Text app can disclose existence of folders in "File Drop" link share · Advisory · nextcloud/security-advisories · GitHub CONFIRM github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 751131 OpenSUSE Security Update for nextcloud (openSUSE-SU-2021:1253-1)
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