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GitHub_MCVE-2021-32766

HistorySep 07, 2021 - 9:15 p.m.

CVE-2021-32766

2021-09-0721:15:08

CWE-209

GitHub_M

web.nvd.nist.gov

nextcloud

nextcloud text

vulnerability

cve-2021-32766

plaintext editing

security

enumeration

"file drop"

nvd

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

36.7%

JSON

Nextcloud Text is an open source plaintext editing application which ships with the nextcloud server. In affected versions the Nextcloud Text application returned different error messages depending on whether a folder existed in a public link share. This is problematic in case the public link share has been created with “Upload Only” privileges. (aka “File Drop”). A link share recipient is not expected to see which folders or files exist in a “File Drop” share. Using this vulnerability an attacker is able to enumerate folders in such a share. Exploitation requires that the attacker has access to a valid affected “File Drop” link share. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.0.1. Users who are unable to upgrade are advised to disable the Nextcloud Text application in the app settings.

Affected configurations

Nvd

Vulners

Node

nextcloudnextcloud_serverRange<20.0.12

nextcloudnextcloud_serverRange21.0.0–21.0.4

nextcloudnextcloud_serverRange22.0.0–22.1.0

VendorProductVersionCPE
nextcloudnextcloud_server*cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
nextcloud	nextcloud_server	*	cpe:2.3:a:nextcloud:nextcloud_server::::::::

CNA Affected

[
  {
    "product": "security-advisories",
    "vendor": "nextcloud",
    "versions": [
      {
        "status": "affected",
        "version": "< 20.0.12"
      },
      {
        "status": "affected",
        "version": ">= 21.0.0, < 21.0.4"
      },
      {
        "status": "affected",
        "version": ">= 22.0.0, < 22.0.1"
      }
    ]
  }
]