CVE-2016-9463

CVSS V2 Medium 6.8 CVSS V3 High 8.1
Description
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.
Overview
  • CVE ID
  • CVE-2016-9463
  • Assigner
  • support@hackerone.com
  • Vulnerability Status
  • Modified
  • Published Version
  • 2017-03-28T02:59:00
  • Last Modified Date
  • 2019-10-09T23:20:28
Weakness Enumerations
CWE URL
CWE-287 http://cwe.mitre.org/data/definitions/287.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* 1 OR 9.0.54
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* 1 OR 10.0.0 10.0.1
cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:* 1 OR 8.2.0 8.2.9
cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:* 1 OR 9.0.0 9.0.4
cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:* 1 OR 9.1.0 9.1.2
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 6.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.1
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.2
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/ Exploit Technical Description Third Party Advisory
https://owncloud.org/security/advisory/?id=oc-sa-2016-017 Patch Vendor Advisory
https://nextcloud.com/security/advisory/?id=nc-sa-2016-006 Patch Vendor Advisory
https://hackerone.com/reports/148151 Exploit Third Party Advisory
https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3 Issue Tracking Patch Third Party Advisory
https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732 Issue Tracking Patch Third Party Advisory
https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791 Issue Tracking Patch Third Party Advisory
https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087 Issue Tracking Patch Third Party Advisory
https://github.com/nextcloud/apps/commit/b85ace6840b8a6704641086bc3b8eb8e81cb2274 Issue Tracking Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2016-9463
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9463
History
Created Old Value New Value Data Type Notes
2022-05-10 17:13:42 Added to TrackCVE
2022-12-02 15:11:56 cve-assignments@hackerone.com support@hackerone.com CVE Assigner updated
2022-12-02 15:11:56 2017-03-28T02:59Z 2017-03-28T02:59:00 CVE Published Date updated
2022-12-02 15:11:56 2019-10-09T23:20:28 CVE Modified Date updated
2022-12-02 15:11:56 Modified Vulnerability Status updated