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`.
References
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
21 Nov 2024, 06:07
Type | Values Removed | Values Added |
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CVSS |
v2 : v3 : |
v2 : 6.8
v3 : 3.5 |
References | () https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3hjp-26x8-mhf6 - Third Party Advisory | |
References | () https://github.com/nextcloud/server/pull/27354 - Patch, Third Party Advisory | |
References | () https://hackerone.com/reports/1215263 - Permissions Required | |
References | () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/ - | |
References | () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/ - | |
References | () https://security.gentoo.org/glsa/202208-17 - Third Party Advisory |
07 Nov 2023, 03:35
Type | Values Removed | Values Added |
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References |
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Information
Published : 2021-07-12 13:15
Updated : 2024-11-21 06:07
NVD link : CVE-2021-32679
Mitre link : CVE-2021-32679
CVE.ORG link : CVE-2021-32679
JSON object : View
Products Affected
fedoraproject
- fedora
nextcloud
- nextcloud_server
CWE
CWE-116
Improper Encoding or Escaping of Output