SB2023040724 - Multiple vulnerabilities in Nextcloud Server

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Main Vulnerability Database SB2023040724

SB2023040724 - Multiple vulnerabilities in Nextcloud Server

Published: April 7, 2023

Security Bulletin ID SB2023040724
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Information disclosure (CVE-ID: CVE-2023-28834)

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 user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote user can obtain the full data directory path of the Nextcloud server from an API endpoint.


2) Improper access control (CVE-ID: CVE-2023-28844)

CWE-ID: CWE-284 - Improper Access Control

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 user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote user without download permissions can bypass implemented security restrictions and download older versions of files from the server.


Remediation

Install update from vendor's website.

References