CVE-2019-1681 Explained : Impact and Mitigation

A weakness has been identified in the Cisco Network Convergence System 1000 Series software's TFTP service, allowing unauthorized attackers to access arbitrary files, potentially leading to information disclosure.

Understanding CVE-2019-1681

This CVE involves a vulnerability in the TFTP service of Cisco Network Convergence System 1000 Series software.

What is CVE-2019-1681?

The vulnerability allows attackers to obtain arbitrary files from the targeted device by sending malicious requests containing directory traversal techniques to the TFTP service.

The Impact of CVE-2019-1681

CVSS Base Score: 7.5 (High Severity)
Confidentiality Impact: High
Attack Vector: Network
Attack Complexity: Low
The flaw could lead to the exposure of sensitive information on affected devices.

Technical Details of CVE-2019-1681

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Inadequate validation of user-supplied input in the TFTP service of Cisco Network Convergence System 1000 Series software.

Affected Systems and Versions

Affected Product: Cisco Network Convergence System 1000 Series
Vendor: Cisco
Affected Versions: Prior to Release 6.5.2

Exploitation Mechanism

Attackers exploit the vulnerability by sending malicious requests with directory traversal techniques to the TFTP service on the targeted device.

Mitigation and Prevention

Protecting systems from CVE-2019-1681 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable the TFTP service on affected devices if not essential.
Implement network segmentation to limit access to vulnerable services.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.

Patching and Updates

Apply the necessary patches provided by Cisco to address the vulnerability.