CVE-2022-41882CWE-94

Nextcloud Desktop vulnerable to code injection via malicious link

Medium · published November 11, 2022

CVSS v3.1
6.6
EPSS
0%
Percentile
41.4
In the wild
Unconfirmed
What it is

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. In version 3.6.0, if a user received a malicious file share and has it synced locally or the virtual filesystem enabled and clicked a nc://open/ link it will open the default editor for the file type of the shared file, which on Windows can also sometimes mean that a file depending on the type, e.g. "vbs", is being executed. It is recommended that the Nextcloud Desktop client is upgraded to version 3.6.1. As a workaround, users can block the Nextcloud Desktop client 3.6.0 by setting the `minimum.supported.desktop.version` system config to `3.6.1` on the server, so new files designed to use this attack vector are not downloaded anymore. Already existing files can still be used. Another workaround would be to enforce shares to be accepted by setting the `sharing.force_share_accept` system config to `true` on the server, so new files designed to use this attack vector are not downloaded anymore. Already existing shares can still be abused.

The record
Technical detail
CVSS v3.1
6.6 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00492 · 41.4th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2022-11-11T00:00Z
EPSS history
Timeline
  • 11 NOV 00:00Z
    Nextcloud Desktop vulnerable to code injection via malicious link
    cvelistv5