CVE-2023-34216 Explained : Impact and Mitigation
Discover the impact of CVE-2023-34216 affecting Moxa products like TN-4900 and TN-5900 Series routers. Learn about the command-injection flaw, affected systems, mitigation steps, and security best practices.
Second Order Command-injection Vulnerability in the Key-delete Function
Understanding CVE-2023-34216
This CVE discloses a second-order command-injection vulnerability in Moxa products, specifically affecting TN-4900 Series firmware versions v1.2.4 and prior, and TN-5900 Series firmware versions v3.3 and prior.
What is CVE-2023-34216?
Moxa's TN-4900 and TN-5900 Series routers are impacted by a command-injection flaw due to inadequate input validation in the key-delete function, potentially enabling attackers to delete arbitrary files.
The Impact of CVE-2023-34216
The vulnerability, categorized under CAPEC-126 Path Traversal, poses a high risk with an 8.1 CVSS base score, compromising system integrity and availability.
Technical Details of CVE-2023-34216
Vulnerability Description
The vulnerability arises from insufficient input validation in the key-delete function, allowing malicious actors to execute arbitrary commands and delete files.
Affected Systems and Versions
- TN-4900 Series: Firmware versions v1.2.4 and earlier
- TN-5900 Series: Firmware versions v3.3 and prior
- EDR-G902 Series: Firmware versions less than or equal to 5.7.17
- EDR-G903 Series: Firmware versions less than or equal to 5.7.15
- EDR-G9010 Series: Firmware versions less than or equal to 2.1
- NAT-102 Series: Firmware versions less than or equal to 1.0.3
Exploitation Mechanism
The vulnerability allows threat actors to craft malicious requests, exploiting the key-delete function to execute unauthorized commands and delete critical files.
Mitigation and Prevention
Immediate Steps to Take
Moxa has provided firmware updates to address the vulnerability:
- TN-4900 Series: Upgrade to firmware v3.0 or higher
- TN-5900 Series: Upgrade to firmware v3.4 or higher
- EDR-G902 Series: Upgrade to firmware v5.7.21 or higher
- EDR-G903 Series: Upgrade to firmware v5.7.21 or higher
- EDR-G9010 Series: Upgrade to firmware v3.0 or higher
- NAT-102 Series: Upgrade to firmware v1.0.5 or higher
Long-Term Security Practices
Regularly update system firmware and maintain stringent input validation practices to prevent command-injection vulnerabilities.
Patching and Updates
Apply the recommended patches and keep abreast of security advisories from Moxa to safeguard against emerging vulnerabilities.