Bug 2142764 (CVE-2022-41882)

Summary:	CVE-2022-41882 nextcloud-client: desktop client can be tricked into opening/executing local files when clicking a nc://open/ link
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	nextcloud-client 3.6.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-12-04 15:33:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2142766, 2142765
Bug Blocks:

Description Marian Rehak 2022-11-15 08:25:35 UTC

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.

Reference:

https://github.com/nextcloud/server/pull/34559
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3w86-rm38-8w63
https://github.com/nextcloud/desktop/releases/tag/v3.6.1
https://github.com/nextcloud/desktop/pull/5039

Comment 1 Marian Rehak 2022-11-15 08:25:55 UTC

Created nextcloud-client tracking bugs for this issue:

Affects: epel-8 [bug 2142766]
Affects: fedora-all [bug 2142765]

Comment 2 Product Security DevOps Team 2022-12-04 15:33:25 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.