CVE-2018-19879 : Exploit Details and Defense Strategies

Teltonika RTU9XX devices with firmware versions prior to R_00.05.00.5 are vulnerable to unauthorized login attempts due to a lack of protection in the /cgi-bin/luci application.

Understanding CVE-2018-19879

The vulnerability in Teltonika RTU9XX devices allows anonymous attackers to continuously attempt login using automated tools, posing a high risk of password compromise.

What is CVE-2018-19879?

The Teltonika RTU9XX devices, such as RUT950, are susceptible to unauthorized login attempts as the authentication feature lacks protection against automated tools, enabling attackers to potentially crack user passwords.

The Impact of CVE-2018-19879

CVSS Base Score: 7.1 (High)
Attack Vector: Adjacent Network
Attack Complexity: Low
Confidentiality Impact: Low
Integrity Impact: Low
Availability Impact: Low
Privileges Required: None
User Interaction: None
Scope: Changed

Technical Details of CVE-2018-19879

Teltonika RTU9XX devices are affected by a vulnerability that allows unauthorized login attempts through the /cgi-bin/luci application.

Vulnerability Description

The authentication mechanism in the /cgi-bin/luci application lacks protection against automated tools, enabling unlimited login attempts by anonymous attackers.

Affected Systems and Versions

Affected Product: Teltonika RTU9XX (e.g., RUT950)
Vulnerable Versions: R_31.04.89 before R_00.05.00.5

Exploitation Mechanism

Attackers can exploit this vulnerability by using automated tools to continuously attempt login, increasing the likelihood of successfully cracking a user's password.

Mitigation and Prevention

To address CVE-2018-19879, follow these steps:

Immediate Steps to Take

Implement strong, unique passwords
Monitor login attempts for unusual activity
Limit login attempts to prevent brute force attacks

Long-Term Security Practices

Regularly update firmware to the latest version
Conduct security assessments and penetration testing

Patching and Updates

Apply the latest firmware updates provided by Teltonika to mitigate the vulnerability.