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.
History

No history.

cve-icon 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

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2017-03-28T02:59:00.933

Modified: 2019-10-09T23:20:28.990

Link: CVE-2016-9463

cve-icon Redhat

No data.