CVE-2021-38387 : Vulnerability Insights and Analysis

Contiki 3.0 is affected by a vulnerability where a Telnet server that quits silently can cause connected clients to enter an infinite loop, leading to excessive CPU consumption.

Understanding CVE-2021-38387

This CVE refers to a specific flaw in Contiki 3.0 that poses a risk to systems using Telnet services.

What is CVE-2021-38387?

CVE-2021-38387 involves a Telnet server in Contiki 3.0 that unexpectedly quits, causing connected clients to remain in an infinite loop indefinitely, which could result in high CPU usage.

The Impact of CVE-2021-38387

The impact of this vulnerability is severe as it can lead to denial of service due to excessive CPU consumption and system instability.

Technical Details of CVE-2021-38387

Detailed technical information about the vulnerability.

Vulnerability Description

In Contiki 3.0, the Telnet server shutdown behavior can trigger an infinite loop in connected clients, impacting CPU performance.

Affected Systems and Versions

All systems running Contiki 3.0 with Telnet server functionality enabled are vulnerable to CVE-2021-38387.

Exploitation Mechanism

Exploiting this vulnerability involves triggering the Telnet server to quit unexpectedly, forcing connected clients into an infinite loop.

Mitigation and Prevention

Effective strategies to manage and prevent the CVE-2021-38387 vulnerability.

Immediate Steps to Take

System administrators should consider disabling the Telnet server or implementing a fix provided by the vendor.

Long-Term Security Practices

Regularly update Contiki to the latest version and monitor security advisories for patches addressing this vulnerability.

Patching and Updates

Apply patches released by Contiki developers to address the flaw in the Telnet server and prevent clients from entering infinite loops.