CVE-2019-19148 : Security Advisory and Response

Tellabs Optical Line Terminal (OLT) 1150 devices were susceptible to Remote Command Execution via TELNET or SSH. The issue has been addressed in the SR30.1 and SR31.1 releases.

Understanding CVE-2019-19148

This CVE entry highlights a vulnerability in Tellabs OLT 1150 devices that allowed remote command execution through specific options in TELNET or SSH protocols.

What is CVE-2019-19148?

The vulnerability in Tellabs OLT 1150 devices enabled malicious actors to execute remote commands using the -l option in TELNET or SSH, potentially leading to unauthorized access and control of the affected devices.

The Impact of CVE-2019-19148

Exploitation of this vulnerability could result in unauthorized access to the affected devices, allowing attackers to execute arbitrary commands and potentially compromise the security and integrity of the network infrastructure.

Technical Details of CVE-2019-19148

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw in Tellabs OLT 1150 devices allowed remote command execution through the -l option in TELNET or SSH, posing a significant security risk to the affected devices.

Affected Systems and Versions

Product: Tellabs OLT 1150
Versions: SR30.1 and SR31.1

Exploitation Mechanism

Malicious actors could exploit this vulnerability by utilizing the -l option in TELNET or SSH to execute unauthorized remote commands on the Tellabs OLT 1150 devices.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2019-19148, the following steps are recommended:

Immediate Steps to Take

Update affected devices to the patched versions SR30.1 and SR31.1 released by Tellabs on February 18, 2020.
Disable unnecessary services like TELNET or SSH if not required for operations.

Long-Term Security Practices

Regularly monitor and audit network devices for any unauthorized access or unusual activities.
Implement strong access controls and authentication mechanisms to prevent unauthorized access to critical devices.

Patching and Updates

Stay informed about security updates and patches released by Tellabs for their products.
Promptly apply patches and updates to ensure the security of network infrastructure.