CVE-2020-3519 : Exploit Details and Defense Strategies

A vulnerability in a specific REST API method of Cisco Data Center Network Manager (DCNM) Software could allow an authenticated, remote attacker to conduct a path traversal attack on an affected device.

Understanding CVE-2020-3519

This CVE involves a path traversal vulnerability in Cisco Data Center Network Manager (DCNM) Software.

What is CVE-2020-3519?

The vulnerability in a specific REST API method of Cisco DCNM Software allows an authenticated remote attacker to perform a path traversal attack by exploiting insufficient validation of user-supplied input.

The Impact of CVE-2020-3519

An attacker could overwrite arbitrary files on the affected device by sending a crafted request to the API.
The base severity is rated as MEDIUM with a CVSS base score of 5.4.

Technical Details of CVE-2020-3519

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises due to inadequate validation of user-supplied input to the API, enabling attackers to manipulate file paths.

Affected Systems and Versions

Product: Cisco Data Center Network Manager
Vendor: Cisco
Affected Version: Not applicable (n/a)

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specially crafted request to the API, allowing them to traverse directories and overwrite files on the targeted device.

Mitigation and Prevention

Protecting systems from CVE-2020-3519 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Monitor network traffic for any suspicious activities.
Restrict access to the affected API to authorized users only.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security training for staff to recognize and respond to potential threats.

Patching and Updates

Cisco has likely released patches or updates to address this vulnerability. Ensure timely application of these fixes to secure the system.