Upstream information

CVE-2021-32679 at MITRE

Description

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`.

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 6.8
Vector AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database
Base Score 8.8
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Access Vector Network
Access Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
CVSSv3 Version 3.1
No SUSE Bugzilla entries cross referenced.

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub for SUSE Linux Enterprise 12
  • nextcloud >= 20.0.11-28.1
  • nextcloud-apache >= 20.0.11-28.1
Patchnames:
openSUSE-2021-1068
SUSE Package Hub for SUSE Linux Enterprise 15 SP1
  • nextcloud >= 20.0.11-bp151.3.15.1
  • nextcloud-apache >= 20.0.11-bp151.3.15.1
Patchnames:
openSUSE-2021-1068
SUSE Package Hub for SUSE Linux Enterprise 15 SP2
  • nextcloud >= 20.0.11-bp152.2.9.1
  • nextcloud-apache >= 20.0.11-bp152.2.9.1
Patchnames:
openSUSE-2021-1068
SUSE Package Hub for SUSE Linux Enterprise 15 SP3
  • nextcloud >= 20.0.11-bp153.2.3.1
  • nextcloud-apache >= 20.0.11-bp153.2.3.1
Patchnames:
openSUSE-2021-1068
openSUSE Leap 15.2
  • nextcloud >= 20.0.11-lp152.3.9.1
  • nextcloud-apache >= 20.0.11-lp152.3.9.1
Patchnames:
openSUSE-2021-1068
openSUSE Leap 15.3
  • nextcloud >= 20.0.11-bp153.2.3.1
  • nextcloud-apache >= 20.0.11-bp153.2.3.1
Patchnames:
openSUSE-2021-1068