CVE-2016-9463CWE-303

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

published March 28, 2017

CVSS
—
EPSS
4%
Percentile
90.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.04095 · 90.6th percentile
Weakness
CWE-303 · Incorrect Implementation of Authentication Algorithm
Published
2017-03-28T02:46Z
EPSS history
Timeline
  • 28 MAR 02:46Z
    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
    cvelistv5