CVE-2017-5544 : Exploit Details and Defense Strategies

A vulnerability has been detected on FiberHome Fengine S5800 switches V210R240 that allows unauthorized access to the device's SSH service, potentially leading to a denial of service attack.

Understanding CVE-2017-5544

This CVE involves a security issue on FiberHome Fengine S5800 switches V210R240 that can be exploited to gain unauthorized access to the SSH service.

What is CVE-2017-5544?

The vulnerability allows an attacker to establish SSH connections using a password cracking tool, leading to an extended SSH login timeout and denial of service.

The Impact of CVE-2017-5544

Unauthorized individuals can exploit this vulnerability to gain access to the device's SSH service, causing legitimate login attempts via SSH/telnet to be rejected, resulting in a denial of service.

Technical Details of CVE-2017-5544

This section provides technical details about the vulnerability.

Vulnerability Description

An unauthorized individual can exploit the vulnerability to gain access to the device's SSH service and establish SSH connections using a tool for cracking passwords, leading to a denial of service.

Affected Systems and Versions

Product: FiberHome Fengine S5800 switches V210R240
Vendor: FiberHome
Version: V210R240

Exploitation Mechanism

Attackers can use a password cracking tool to establish SSH connections quickly, triggering an increase in the SSH login timeout.
Legitimate login attempts via SSH/telnet will be refused, causing a denial of service.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Restart the affected device to mitigate the vulnerability.

Long-Term Security Practices

Implement strong password policies to prevent unauthorized access.
Regularly monitor and update SSH configurations to enhance security.

Patching and Updates

Stay informed about security updates and patches provided by the vendor to address this vulnerability.