CVE-2021-46082 : Vulnerability Insights and Analysis
Discover the impact of CVE-2021-46082, a memory leak vulnerability in Moxa TN-5900 routers and MGate protocol gateways, allowing attackers to execute DoS attacks. Learn how to mitigate and prevent exploitation.
Moxa TN-5900 v3.1 series routers, MGate 5109 v2.2 series protocol gateways, and MGate 5101-PBM-MN v2.1 series protocol gateways were discovered to contain a memory leak allowing attackers to cause a Denial of Service (DoS) via crafted packets.
Understanding CVE-2021-46082
What is CVE-2021-46082?
A memory leak vulnerability in Moxa TN-5900 routers and MGate protocol gateways enables a DoS attack through specially crafted packets.
The Impact of CVE-2021-46082
This vulnerability allows malicious actors to disrupt the services of affected devices, potentially leading to system unavailability.
Technical Details of CVE-2021-46082
Vulnerability Description
- Vulnerable devices: Moxa TN-5900 v3.1 series routers, MGate 5109 v2.2 series, MGate 5101-PBM-MN v2.1 series protocol gateways
- Issue: Memory leak
- Attack vector: Crafted packets
Affected Systems and Versions
The following systems are affected:
- Moxa TN-5900 v3.1 series routers
- MGate 5109 v2.2 series protocol gateways
- MGate 5101-PBM-MN v2.1 series protocol gateways
Exploitation Mechanism
The vulnerability is exploited by sending specifically designed packets to the devices, triggering the memory leak and resulting in a DoS condition.
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by Moxa as soon as possible.
- Implement network segmentation to minimize the impact of potential attacks.
- Monitor network traffic for any unusual patterns that may indicate an ongoing attack.
Long-Term Security Practices
- Regularly update and patch all network-connected devices.
- Conduct security assessments and audits to identify and mitigate potential vulnerabilities.
- Educate staff on best security practices and awareness of social engineering tactics.
- Consider implementing intrusion detection and prevention systems to enhance network security.
- Keep abreast of security advisories from vendors and security organizations.
- Establish incident response procedures to effectively handle and contain security breaches.
Patching and Updates
Ensure timely installation of patches and updates released by Moxa to address the memory leak vulnerability in the affected devices.