CVE-2021-40397 : Vulnerability Insights and Analysis
Learn about CVE-2021-40397, a high-severity vulnerability in Advantech WISE-PaaS/OTA Server 3.0.9 allowing privilege escalation. Discover impacts, affected systems, and mitigation steps.
This CVE-2021-40397 article provides insights into a privilege escalation vulnerability in Advantech WISE-PaaS/OTA Server 3.0.9, allowing an attacker to gain elevated privileges.
Understanding CVE-2021-40397
CVE-2021-40397 is a high-severity privilege escalation vulnerability in Advantech WISE-PaaS/OTA Server 3.0.9, potentially leading to unauthorized privilege escalation.
What is CVE-2021-40397?
This CVE involves the installation of Advantech WISE-PaaS/OTA Server 3.0.9, where a specially-crafted file can be used to gain NT SYSTEM authority, enabling an attacker to execute malicious activities.
The Impact of CVE-2021-40397
The vulnerability has a high base score of 8.8, with significant impacts on availability, confidentiality, and integrity. The attack complexity is low, but the privilege escalation potential is severe.
Technical Details of CVE-2021-40397
This section delves into specific technical aspects of the vulnerability.
Vulnerability Description
The issue arises from a privilege escalation vulnerability during the installation of Advantech WISE-PaaS/OTA Server 3.0.9, allowing malicious files to grant elevated privileges.
Affected Systems and Versions
- Affected Product: Not Applicable
- Affected Vendor: Not Applicable
- Affected Version: 3.0.9
Exploitation Mechanism
The exploit involves replacing a system file with a specially-crafted file to gain unauthorized access to NT SYSTEM authority.
Mitigation and Prevention
Protective measures to address and prevent potential exploitation of this vulnerability.
Immediate Steps to Take
- Apply vendor-supplied patches promptly.
- Implement file integrity monitoring to detect unauthorized changes.
- Restrict access permissions to critical system files.
Long-Term Security Practices
- Conduct regular security audits and vulnerability assessments.
- Educate users about recognizing and avoiding malicious file downloads.
- Employ the principle of least privilege to limit user access rights.
Patching and Updates
Regularly monitor vendor updates and apply patches to the system to mitigate the privilege escalation vulnerability.