CVE-2023-39952 Advanced permissions not respected when copying entire group folders

2023-08-1013:50:50

CWE-284

GitHub_M

www.cve.org

nextcloud

permissions

vulnerability

data storage

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

42.3%

JSON

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1, a user can access files inside a subfolder of a groupfolder accessible to them, even if advanced permissions would block access to the subfolder. Nextcloud Server versions 25.0.8, 26.0.3, and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1 contain a patch for this issue. No known workarounds are available.

CNA Affected

[
  {
    "vendor": "nextcloud",
    "product": "security-advisories",
    "versions": [
      {
        "version": ">= 22.0.0, < 22.2.10.13",
        "status": "affected"
      },
      {
        "version": ">= 23.0.0, < 23.0.12.8",
        "status": "affected"
      },
      {
        "version": ">= 24.0.0, < 24.0.12.4",
        "status": "affected"
      },
      {
        "version": ">= 25.0.0, < 25.0.8",
        "status": "affected"
      },
      {
        "version": ">= 26.0.0, < 26.0.3",
        "status": "affected"
      },
      {
        "version": ">= 27.0.0, < 27.0.1",
        "status": "affected"
      }
    ]
  }
]