SB2022031412 - Multiple vulnerabilities in Nextcloud Server

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Main Vulnerability Database SB2022031412

SB2022031412 - Multiple vulnerabilities in Nextcloud Server

Published: March 14, 2022

Security Bulletin ID SB2022031412
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Information disclosure (CVE-ID: CVE-2021-41233)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the Nextcloud Text application. A remote user can access the folder names of "File Drop".


2) Information disclosure (CVE-ID: CVE-2021-41239)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to User Status API does not consider the user enumeration settings by the administrator. A remote user can gain unauthorized access to sensitive information on the system.


3) Improper Authorization (CVE-ID: CVE-2021-41241)

CWE-ID: CWE-285 - Improper Authorization

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to bypass authorization check.

The vulnerability exists due to insufficient authorization validation in the groupfolders application. A remote user can gain access to the groupfolder but not specific subfolders.


Remediation

Install update from vendor's website.

References