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GitHub_MCVE-2021-32802

HistorySep 07, 2021 - 10:15 p.m.

CVE-2021-32802

2021-09-0722:15:08

CWE-829

GitHub_M

web.nvd.nist.gov

105

nextcloud

cve

2021

32802

security

vulnerability

image rendering

server-side request forgery

file disclosure

code execution

upgrade

workaround

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.2

Confidence

High

EPSS

0.003

Percentile

68.5%

JSON

Nextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some image types, the Nextcloud server was invoking a third-party library that wasn’t suited for untrusted user-supplied content. There are several security concerns with passing user-generated content to this library, such as Server-Side-Request-Forgery, file disclosure or potentially executing code on the system. The risk depends on your system configuration and the installed library version. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. These versions do not use this library anymore. As a workaround users may disable previews by setting enable_previews to false in config.php.

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, < 22.1.0"
      }
    ]
  }
]