Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, filenames where not escaped by default in controllers using `DownloadResponse`. When a user-supplied filename was passed unsanitized into a `DownloadResponse`, this could be used to trick users into downloading malicious files with a benign file extension. This would show in UI behaviours where Nextcloud applications would display a benign file extension (e.g. JPEG), but the file will actually be downloaded with an executable file extension. The vulnerability is patched in versions 19.0.13, 20.0.11, and 21.0.3. Administrators of Nextcloud instances do not have a workaround available, but developers of Nextcloud apps may manually escape the file name before passing it into `DownloadResponse`.
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References
History
No history.
MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-07-12T12:50:10
Updated: 2024-08-03T23:25:31.075Z
Reserved: 2021-05-12T00:00:00
Link: CVE-2021-32679
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-07-12T13:15:08.013
Modified: 2024-11-21T06:07:30.997
Link: CVE-2021-32679
Redhat
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