SB2021090707 - Multiple vulnerabilities in Nextcloud Server

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Main Vulnerability Database SB2021090707

SB2021090707 - Multiple vulnerabilities in Nextcloud Server

Published: September 7, 2021

Security Bulletin ID SB2021090707
CSH Severity
High
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 25% Medium 75%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Inclusion of Sensitive Information in Log Files (CVE-ID: CVE-2021-32801)

CWE-ID: CWE-532 - Information Exposure Through Log Files

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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 sensitive information.

The vulnerability exists due to software stores sensitive information into log files. A remote attacker can read the log files and gain access to sensitive data.


2) Information disclosure (CVE-ID: CVE-2021-32766)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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 excessive data output within the Nextcloud Text application. A remote attacker can gain unauthorized access to sensitive information on the system.


3) Improper Authentication (CVE-ID: CVE-2021-32800)

CWE-ID: CWE-287 - Improper Authentication

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


The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote authenticated attacker can bypass Two Factor Authentication and gain access to an account.


4) Inclusion of Functionality from Untrusted Control Sphere (CVE-ID: CVE-2021-32802)

CWE-ID: CWE-829 - Inclusion of Functionality from Untrusted Control Sphere

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


The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to preview generation used third-party library not suited for user-generated content. A remote attacker can execute arbitrary code on the target system.


Remediation

Install update from vendor's website.

References