CVE-2020-3923 : Security Advisory and Response
Learn about CVE-2020-3923 involving TONNET DVR firmware vulnerability in TAT-76 and TAT-77 series products, allowing unauthorized access due to broken access control. Find mitigation steps and impacts here.
TONNET DVR – Broken Access Control
Understanding CVE-2020-3923
This CVE involves misconfigured authentication mechanisms in TONNET DVR firmware, allowing attackers to crack default passwords and access the system.
What is CVE-2020-3923?
The vulnerability in TONNET DVR firmware in TAT-76 and TAT-77 series products enables unauthorized access due to broken access control.
The Impact of CVE-2020-3923
The vulnerability has a CVSS base score of 8.1 (High severity) with significant impacts on confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2020-3923
Vulnerability Description
- TONNET DVR firmware in TAT-76 and TAT-77 series products has a misconfigured authentication mechanism.
Affected Systems and Versions
- Platforms: TAT-76 series, TAT-77 series
- Versions: <= 20191216 (TAT-76 series), <= 20200213 (TAT-77 series)
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Network
- Privileges Required: None
- Scope: Unchanged
- User Interaction: None
Mitigation and Prevention
Immediate Steps to Take
- Update TAT-76 series to ver. 20191216
- Update TAT-77 series to ver. 20200213
Long-Term Security Practices
- Implement strong, unique passwords
- Regularly monitor and audit system access
Patching and Updates
- Apply vendor-provided patches promptly to address the vulnerability