CVE-2021-42954 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-42954 on Zoho Remote Access Plus Server for Windows. Learn how to mitigate the vulnerability and prevent unauthorized access to sensitive data.
Zoho Remote Access Plus Server for Windows Desktop Binary, version 10.1.2121.1, suffers from incorrect access control, potentially leading to privilege escalation and unauthorized access to sensitive data.
Understanding CVE-2021-42954
Zoho Remote Access Plus Server for Windows Desktop Binary has a vulnerability that allows weak file permissions, exposing the installation directory to unauthorized access.
What is CVE-2021-42954?
The vulnerability in Zoho Remote Access Plus Server for Windows Desktop Binary, version 10.1.2121.1, enables the Windows Everyone user group to have full control, allowing various malicious activities.
The Impact of CVE-2021-42954
The vulnerability can result in privilege escalation, unauthorized password reset, data theft, access to plaintext credentials, registry values, and configuration file tampering.
Technical Details of CVE-2021-42954
Zoho Remote Access Plus Server for Windows Desktop Binary version 10.1.2121.1 vulnerability details.
Vulnerability Description
The vulnerability arises from incorrect access control, allowing the Windows Everyone user group to have full control over the installation directory.
Affected Systems and Versions
- Product: Zoho Remote Access Plus Server
- Version: 10.1.2121.1
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Local
- Privileges Required: Low
- Scope: Unchanged
- User Interaction: None
- CVSS Score: 7.8 (High)
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
Mitigation and Prevention
Steps to mitigate the CVE-2021-42954 vulnerability.
Immediate Steps to Take
- Update to the latest version of Zoho Remote Access Plus Server.
- Restrict access to the installation directory.
- Monitor system for unauthorized access.
Long-Term Security Practices
- Regularly review and update file permissions.
- Conduct security audits to identify vulnerabilities.
- Implement least privilege access policies.
Patching and Updates
- Apply patches provided by Zoho for the affected version.