CVE-2024-31849: CData Connect Path Traversal Vulnerability

CVE-2024-31849 Overview

A critical path traversal vulnerability exists in the Java version of CData Connect prior to version 23.4.8846 when running with the embedded Jetty server. This vulnerability allows an unauthenticated remote attacker to bypass security controls and gain complete administrative access to the application through specially crafted path traversal sequences.

Critical Impact

This vulnerability enables unauthenticated attackers to achieve full administrative control over CData Connect instances, potentially compromising all connected data sources and integrations.

Affected Products

• CData Connect (Java version) < 23.4.8846
• CData Connect deployments using the embedded Jetty server

Discovery Timeline

• April 5, 2024 - CVE-2024-31849 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2024-31849

Vulnerability Analysis

This path traversal vulnerability (CWE-22) affects the Java version of CData Connect when deployed with the embedded Jetty server. The vulnerability stems from insufficient validation of user-supplied input in URL paths, allowing attackers to use directory traversal sequences (such as ../) to escape the intended directory structure and access restricted administrative endpoints.

The unauthenticated nature of this attack significantly amplifies its severity, as no prior access or credentials are required to exploit the vulnerability. Once exploited, an attacker gains complete administrative privileges over the CData Connect application, which typically serves as a data integration hub connecting multiple data sources.

Root Cause

The root cause is improper input validation (CWE-22: Path Traversal) in the request handling logic when CData Connect operates with the embedded Jetty server. The application fails to properly sanitize and normalize URL paths before processing them, allowing attackers to include directory traversal sequences that bypass intended access restrictions.

Attack Vector

The attack is network-based and requires no authentication or user interaction, making it highly exploitable. An attacker can craft HTTP requests containing path traversal sequences to reach administrative endpoints that should be protected. The embedded Jetty server configuration does not adequately restrict access to sensitive paths, enabling full administrative compromise.

The attack flow typically involves:

1. Identifying a CData Connect instance running the embedded Jetty server
2. Crafting requests with path traversal sequences (e.g., ../) to bypass path restrictions
3. Accessing administrative endpoints to gain full control of the application
4. Leveraging administrative access to compromise connected data sources

For detailed technical analysis, refer to the Tenable Security Research Advisory.

Detection Methods for CVE-2024-31849

Indicators of Compromise

• HTTP requests containing path traversal sequences (../, ..%2f, %2e%2e/) targeting CData Connect endpoints
• Unexpected administrative actions or configuration changes in CData Connect logs
• Authentication bypass attempts observed in application access logs
• Unusual access patterns to administrative APIs from external IP addresses

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block path traversal attempts
• Monitor HTTP access logs for requests containing encoded or unencoded directory traversal sequences
• Implement anomaly detection for administrative endpoint access patterns
• Configure SIEM rules to alert on unauthenticated access to administrative functions

Monitoring Recommendations

• Enable verbose logging on CData Connect instances and forward logs to centralized SIEM
• Monitor for successful administrative actions that lack corresponding authentication events
• Track and alert on configuration changes to CData Connect data source connections
• Implement network-level monitoring for unusual traffic patterns to CData Connect services

How to Mitigate CVE-2024-31849

Immediate Actions Required

• Upgrade CData Connect to version 23.4.8846 or later immediately
• If immediate patching is not possible, restrict network access to CData Connect instances using firewall rules
• Place CData Connect behind a reverse proxy with path traversal filtering capabilities
• Audit CData Connect configurations and connected data sources for signs of compromise

Patch Information

CData has addressed this vulnerability in CData Connect version 23.4.8846 and later. Organizations should upgrade to the latest available version to ensure protection against this vulnerability and any subsequent security fixes. Review the Tenable Security Research Advisory for additional technical details.

Workarounds

• Implement network segmentation to limit access to CData Connect to trusted internal networks only
• Deploy a reverse proxy or WAF with path traversal detection rules in front of CData Connect
• Disable the embedded Jetty server and deploy behind a hardened application server if possible
• Enable IP allowlisting to restrict which hosts can connect to the CData Connect service

# Example: Restrict access to CData Connect using iptables
# Allow only trusted management network (adjust CIDR as needed)
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP