CVE-2020-3521 Explained : Impact and Mitigation

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

Understanding CVE-2020-3521

This CVE involves a security flaw in Cisco Data Center Network Manager that could be exploited by an attacker to perform directory traversal attacks.

What is CVE-2020-3521?

The vulnerability in the REST API of Cisco DCNM Software allows a remote attacker with low privileges to exploit insufficient input validation, potentially leading to unauthorized access to sensitive files on the system.

The Impact of CVE-2020-3521

The vulnerability could enable an attacker to read arbitrary files on the affected system, posing a risk to the confidentiality of sensitive information.

Technical Details of CVE-2020-3521

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from inadequate validation of user-supplied input to the specific REST API of Cisco DCNM Software.

Affected Systems and Versions

Product: Cisco Data Center Network Manager
Vendor: Cisco
Affected Version: Not Applicable

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Confidentiality Impact: High
Integrity Impact: None
Availability Impact: None
Scope: Unchanged
Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Base Score: 5.3 (Medium Severity)

Mitigation and Prevention

Steps to address and prevent the CVE.

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Conduct security assessments and audits to identify and address weaknesses.
Educate users on secure practices to prevent exploitation of vulnerabilities.

Patching and Updates

Stay informed about security advisories from Cisco.
Implement recommended patches and updates to secure the system.