CVE-2020-3984: VMware SD-WAN Orchestrator SQLi Vulnerability

CVE-2020-3984 Overview

CVE-2020-3984 is a SQL Injection vulnerability affecting VMware SD-WAN Orchestrator versions 3.3.2 prior to 3.3.2 P3 and 3.4.x prior to 3.4.4. The vulnerability stems from incorrect input validation in API calls, allowing authenticated users to execute specially crafted SQL queries. Successful exploitation may lead to unauthorized access to sensitive data stored in the orchestrator's database.

Critical Impact
Authenticated attackers can exploit vulnerable API endpoints to extract sensitive configuration data, credentials, and network topology information from the SD-WAN Orchestrator database.

Affected Products

VMware SD-WAN Orchestrator 3.3.2 (prior to P3)
VMware SD-WAN Orchestrator 3.3.2 P1
VMware SD-WAN Orchestrator 3.3.2 P2
VMware SD-WAN Orchestrator 3.4.x (prior to 3.4.4)

Discovery Timeline

2020-11-24 - CVE-2020-3984 published to NVD
2024-11-21 - Last updated in NVD database

Technical Details for CVE-2020-3984

Vulnerability Analysis

This vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The VMware SD-WAN Orchestrator fails to properly sanitize user-supplied input in certain API endpoints before incorporating it into SQL queries. This architectural weakness allows authenticated users to manipulate database queries by injecting malicious SQL syntax.

The attack requires network access and valid credentials to the SD-WAN Orchestrator interface. Once authenticated, an attacker can leverage the vulnerable API calls to bypass intended query restrictions and directly interact with the underlying database. The primary impact is confidentiality-focused, enabling unauthorized read access to database contents without affecting data integrity or system availability.

Root Cause

The root cause of CVE-2020-3984 is insufficient input validation and sanitization in the SD-WAN Orchestrator's API layer. The application directly incorporates user-controlled parameters into SQL statements without proper parameterization or escaping of special characters. This allows SQL metacharacters and commands to be interpreted as part of the query structure rather than literal data values.

Attack Vector

The attack vector is network-based, requiring the attacker to have authenticated access to the SD-WAN Orchestrator web interface. The exploitation flow involves:

Authenticating to the SD-WAN Orchestrator with valid credentials
Identifying vulnerable API endpoints that accept user input
Crafting malicious SQL injection payloads targeting database extraction
Submitting the crafted requests through the vulnerable API calls
Parsing the response to extract unauthorized database content

The vulnerability enables data exfiltration through error-based, union-based, or blind SQL injection techniques depending on the specific API endpoint behavior.

Detection Methods for CVE-2020-3984

Indicators of Compromise

Unusual or malformed API requests containing SQL syntax characters such as single quotes, UNION, SELECT, or comment sequences (--, /**/)
Abnormal database query patterns originating from the SD-WAN Orchestrator application
Unexpected data access logs showing queries to tables outside normal application scope
Authentication events followed by rapid sequences of API calls with varying parameters

Detection Strategies

Deploy web application firewalls (WAF) configured to detect SQL injection patterns in API traffic
Enable detailed logging on the SD-WAN Orchestrator and monitor for suspicious API request patterns
Implement database activity monitoring to detect anomalous query structures and unauthorized table access
Review authentication logs for accounts making unusual API call sequences

Monitoring Recommendations

Configure SIEM alerts for SQL injection signature patterns in SD-WAN Orchestrator logs
Monitor database server performance metrics for unusual query execution times that may indicate blind SQL injection attempts
Establish baseline API usage patterns and alert on deviations
Implement network traffic analysis to detect data exfiltration patterns following API interactions

How to Mitigate CVE-2020-3984

Immediate Actions Required

Upgrade VMware SD-WAN Orchestrator 3.3.2 installations to version 3.3.2 P3 or later
Upgrade VMware SD-WAN Orchestrator 3.4.x installations to version 3.4.4 or later
Review and restrict user access privileges to minimize potential attack surface
Enable comprehensive logging and monitoring on SD-WAN Orchestrator systems pending upgrade
Audit existing user accounts and remove unnecessary or inactive credentials

Patch Information

VMware has addressed this vulnerability in SD-WAN Orchestrator versions 3.3.2 P3 and 3.4.4. Organizations should consult the VMware Security Advisory VMSA-2020-0025 for detailed patching instructions and additional security guidance. Priority should be given to internet-facing or externally accessible SD-WAN Orchestrator deployments.

Workarounds

Restrict network access to the SD-WAN Orchestrator management interface using firewall rules or VPN requirements
Implement additional authentication controls such as multi-factor authentication to reduce credential compromise risk
Deploy a web application firewall in front of the SD-WAN Orchestrator with SQL injection detection rules enabled
Review and minimize the privileges assigned to SD-WAN Orchestrator user accounts

bash

# Example: Restrict access to SD-WAN Orchestrator management interface
# Add firewall rules to limit access to trusted management networks only
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP