CVE-2016-9464

Published: 28 March 2017

Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group.

Priority

Cvss 3 Severity Score

4.3

Score breakdown

Status

Package	Release	Status
nextcloud Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
owncloud Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist (trusty was not-affected [code not present])
	upstream	Needs triage
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist

Severity score breakdown

Parameter	Value
Base score	4.3
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

Bugs

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=835086

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