github - ghsa-4r4x-7f2r-2f4c

GHSA-4R4X-7F2R-2F4C

Vulnerability from github – Published: 2022-05-13 01:38 – Updated: 2025-04-20 03:34

Details

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.

Severity ?

8.1 (High)


                  
                    CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2016-9463"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-303"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-03-28T02:59:00Z",
    "severity": "HIGH"
  },
  "details": "Nextcloud Server before 9.0.54 and 10.0.1 \u0026 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\u0027re not affected by this vulnerability.",
  "id": "GHSA-4r4x-7f2r-2f4c",
  "modified": "2025-04-20T03:34:57Z",
  "published": "2022-05-13T01:38:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-9463"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nextcloud/apps/commit/b85ace6840b8a6704641086bc3b8eb8e81cb2274"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087"
    },
    {
      "type": "WEB",
      "url": "https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791"
    },
    {
      "type": "WEB",
      "url": "https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732"
    },
    {
      "type": "WEB",
      "url": "https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/148151"
    },
    {
      "type": "WEB",
      "url": "https://nextcloud.com/security/advisory/?id=nc-sa-2016-006"
    },
    {
      "type": "WEB",
      "url": "https://owncloud.org/security/advisory/?id=oc-sa-2016-017"
    },
    {
      "type": "WEB",
      "url": "https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2016-9463 (GCVE-0-2016-9463)

Vulnerability from cvelistv5 – Published: 2017-03-28 02:46 – Updated: 2024-08-06 02:50

Summary

Severity ?

No CVSS data available.

CWE

CWE-303 - Incorrect Implementation of Authentication Algorithms (CWE-303)

Assigner

hackerone

References

URL

Tags

	https://github.com/nextcloud/apps/commit/b85ace68…	x_refsource_MISC
	https://github.com/owncloud/apps/commit/16cbccfc9…	x_refsource_MISC
	https://rhinosecuritylabs.com/2016/10/operation-o…	x_refsource_MISC
	https://github.com/owncloud/apps/commit/5d47e7b52…	x_refsource_MISC
	https://github.com/owncloud/apps/commit/a0e07b7dd…	x_refsource_MISC
	https://hackerone.com/reports/148151	x_refsource_MISC
	https://github.com/nextcloud/apps/commit/decb91fd…	x_refsource_MISC
	https://owncloud.org/security/advisory/?id=oc-sa-…	x_refsource_MISC
	https://nextcloud.com/security/advisory/?id=nc-sa…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9	Affected: Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-4R4X-7F2R-2F4C

CVE-2016-9463 (GCVE-0-2016-9463)

Tags

Sightings

Nomenclature