SB2021081902 - Multiple vulnerabilities in Nextcloud Desktop Client

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Main Vulnerability Database SB2021081902

SB2021081902 - Multiple vulnerabilities in Nextcloud Desktop Client

Published: August 19, 2021

Security Bulletin ID SB2021081902
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Untrusted search path (CVE-ID: CVE-2021-37617)

CWE-ID: CWE-426 - Untrusted Search Path

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 escalate privileges.

The vulnerability exists due to uncontrolled search path. A remote attacker can create a malicious "Uninstall.exe" and execute it with administrative privileges on the target system.


2) Improper Certificate Validation (CVE-ID: CVE-2021-32728)

CWE-ID: CWE-295 - Improper Certificate Validation

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 compromise the target system.

The vulnerability exists due to the client fails to check if a private key belongs to previously downloaded public certificate. A remote attacker can encrypt the data on the target system.


Remediation

Install update from vendor's website.

References