CVE-2021-33317 : Vulnerability Insights and Analysis

This CVE-2021-33317 involves a null pointer dereference vulnerability in the TRENDnet TI-PG1284i switch(hw v2.0R) prior to version 2.0.2.S0. The vulnerability is present in its lldp related component, allowing an attacker to crash the process by sending a specially crafted lldp packet.

Understanding CVE-2021-33317

This section will delve into the specifics of CVE-2021-33317, its impact, technical details, and mitigation strategies.

What is CVE-2021-33317?

The TRENDnet TI-PG1284i switch(hw v2.0R) prior to version 2.0.2.S0 is affected by a null pointer dereference vulnerability in its lldp component. Attackers can exploit this flaw to crash the system by sending a malicious lldp packet.

The Impact of CVE-2021-33317

The impact of this vulnerability is significant as it allows attackers to disrupt the normal operation of the affected device, potentially leading to denial of service or other malicious activities.

Technical Details of CVE-2021-33317

Let's explore the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The null pointer dereference vulnerability in the lldp component of the TRENDnet TI-PG1284i switch allows attackers to crash the system by sending a crafted lldp packet.

Affected Systems and Versions

The vulnerability affects TRENDnet TI-PG1284i switch(hw v2.0R) versions prior to 2.0.2.S0.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specially crafted lldp packet to the device, triggering a null pointer dereference and crashing the process.

Mitigation and Prevention

Learn how to address CVE-2021-33317 through immediate steps and long-term security practices.

Immediate Steps to Take

It is recommended to update the TRENDnet TI-PG1284i switch to version 2.0.2.S0 or later to mitigate the null pointer dereference vulnerability.

Long-Term Security Practices

In addition to patching, implementing network segmentation, access controls, and regular security audits can enhance the overall security posture.

Patching and Updates

Stay informed about security updates for the TRENDnet TI-PG1284i switch and apply patches promptly to protect your infrastructure.