CVE-2021-25846 Explained : Impact and Mitigation

This CVE-2021-25846 concerns an improper validation issue in the ChassisID TLV of Moxa Camera VPort 06EC-2V Series, version 1.1. Attackers can exploit this vulnerability to trigger a denial of service through a crafted lldp packet.

Understanding CVE-2021-25846

This section dives into the details of the CVE-2021-25846 vulnerability.

What is CVE-2021-25846?

The CVE-2021-25846 involves inadequate validation of the ChassisID TLV in Moxa Camera VPort 06EC-2V Series, version 1.1, enabling attackers to disrupt services by passing a negative number to the memcpy function via a manipulated lldp packet.

The Impact of CVE-2021-25846

Exploitation of this vulnerability can lead to a denial of service (DoS) condition, affecting the availability and functionality of the Moxa Camera VPort 06EC-2V Series products.

Technical Details of CVE-2021-25846

This section provides technical insights into CVE-2021-25846.

Vulnerability Description

The flaw arises from insufficient validation of the ChassisID TLV, allowing a negative number to be transmitted via a specially crafted lldp packet, potentially crashing the affected device.

Affected Systems and Versions

Moxa Camera VPort 06EC-2V Series, version 1.1, is impacted by this vulnerability, exposing devices running this specific software version to exploitation.

Exploitation Mechanism

Attackers can exploit this weakness by sending a malicious lldp packet containing a negative number to the memcpy function in userdisk/vport_lldpd of the affected Moxa Camera VPort 06EC-2V Series device.

Mitigation and Prevention

Understanding how to mitigate and prevent the CVE-2021-25846 vulnerability is crucial for ensuring system security.

Immediate Steps to Take

Users are advised to apply security patches provided by Moxa promptly to address this vulnerability and prevent potential exploitation.

Long-Term Security Practices

Implementing network segmentation, access controls, and traffic monitoring can bolster the overall security posture and help mitigate similar risks in the future.

Patching and Updates

Regularly check for security updates and patches from Moxa for the Camera VPort 06EC-2V Series devices to stay protected against known vulnerabilities.