Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: hackerone
Published: 2017-03-28T02:46:00
Updated: 2024-08-06T02:50:38.584Z
Reserved: 2016-11-19T00:00:00
Link: CVE-2016-9463
Vulnrichment
No data.
NVD
Status : Modified
Published: 2017-03-28T02:59:00.933
Modified: 2024-11-21T03:01:16.050
Link: CVE-2016-9463
Redhat
No data.