CVE-2025-4993: RTI Connext Use-After-Free Vulnerability

CVE-2025-4993 Overview

CVE-2025-4993 is an Untrusted Pointer Dereference vulnerability affecting RTI Connext Professional Core Libraries. This vulnerability allows attackers to perform pointer manipulation attacks against systems running vulnerable versions of the Connext Professional middleware platform. RTI Connext Professional is widely used in real-time distributed systems, including industrial control systems, autonomous vehicles, and aerospace applications, making this vulnerability particularly concerning for critical infrastructure environments.

Critical Impact

Successful exploitation of this vulnerability could allow remote attackers to read sensitive memory contents or cause denial of service conditions by manipulating pointer values in the Connext Professional Core Libraries, potentially compromising critical real-time systems.

Affected Products

• RTI Connext Professional versions 7.4.0 to before 7.6.0
• RTI Connext Professional versions 7.0.0 to before 7.3.0.10
• RTI Connext Professional versions 6.1.0 to before 6.1.2.27
• RTI Connext Professional versions 6.0.0 and earlier 6.0.x releases
• RTI Connext Professional versions 5.3.0 and earlier 5.3.x releases
• RTI Connext Professional versions 4.4a to before 5.2.x

Discovery Timeline

• 2025-09-23 - CVE-2025-4993 published to NVD
• 2025-10-01 - Last updated in NVD database

Technical Details for CVE-2025-4993

Vulnerability Analysis

This vulnerability is classified as CWE-822 (Untrusted Pointer Dereference), which occurs when the application dereferences a pointer that contains a location for memory that was previously valid but is no longer valid. In the context of RTI Connext Professional, this vulnerability exists within the Core Libraries that handle Data Distribution Service (DDS) communications.

The network-accessible nature of this vulnerability means that attackers can potentially exploit it remotely without requiring any user interaction or authentication. The vulnerability can lead to unauthorized disclosure of confidential information stored in memory or cause the affected system to crash, resulting in denial of service conditions.

Root Cause

The root cause of CVE-2025-4993 lies in improper validation of pointer values within the RTI Connext Professional Core Libraries. When processing certain data structures, the library fails to adequately verify that pointer values point to valid memory locations before dereferencing them. This allows an attacker to supply maliciously crafted pointer values that, when dereferenced, can either read arbitrary memory locations or cause the application to crash by accessing invalid memory addresses.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no privileges or user interaction. An attacker can exploit this vulnerability by sending specially crafted network packets to a system running vulnerable versions of RTI Connext Professional. The attack targets the DDS middleware layer, which handles real-time publish-subscribe communications between distributed applications.

The exploitation mechanism involves sending malformed DDS protocol messages that contain manipulated pointer values. When the vulnerable Core Libraries process these messages, they dereference the attacker-controlled pointers, potentially leading to information disclosure (reading sensitive memory contents) or denial of service (accessing invalid memory causing a crash).

Detection Methods for CVE-2025-4993

Indicators of Compromise

• Unexpected crashes or segmentation faults in applications using RTI Connext Professional libraries
• Anomalous memory access patterns or core dumps indicating invalid pointer dereferences
• Unusual network traffic patterns targeting DDS communication ports
• Memory corruption errors logged by RTI Connext Professional components

Detection Strategies

• Monitor system logs for segmentation faults or access violations in processes using RTI Connext Professional
• Implement network intrusion detection rules to identify malformed DDS protocol traffic
• Deploy application-level monitoring to detect abnormal behavior in Connext-based applications
• Use memory debugging tools to identify suspicious pointer dereference operations

Monitoring Recommendations

• Enable detailed logging for RTI Connext Professional Core Libraries to capture potential exploitation attempts
• Monitor network traffic on DDS communication channels for unusual packet structures
• Implement real-time alerting for application crashes involving Connext Professional components
• Conduct regular security assessments of systems running affected versions

How to Mitigate CVE-2025-4993

Immediate Actions Required

• Identify all systems running vulnerable versions of RTI Connext Professional (4.4a through 7.5.x)
• Prioritize patching for internet-facing or critical infrastructure systems
• Implement network segmentation to limit exposure of DDS communication channels
• Apply vendor-provided patches as soon as available

Patch Information

RTI has released security updates to address this vulnerability. Organizations should upgrade to the following patched versions:

• For version 7.4.x branch: Upgrade to version 7.6.0 or later
• For version 7.0.x branch: Upgrade to version 7.3.0.10 or later
• For version 6.1.x branch: Upgrade to version 6.1.2.27 or later

For detailed patch information and download links, refer to the RTI Security Advisory.

Workarounds

• Implement strict network access controls to limit which systems can communicate via DDS protocols
• Deploy firewalls or network filters to restrict access to DDS communication ports
• Enable DDS Security features where available to add authentication and encryption layers
• Monitor for abnormal behavior and implement application-level input validation where possible

# Configuration example - Network segmentation for DDS traffic
# Restrict DDS communication to trusted network segments only
# Example iptables rules to limit DDS discovery and data ports

# Allow DDS traffic only from trusted subnet
iptables -A INPUT -p udp --dport 7400:7500 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p udp --dport 7400:7500 -j DROP

# Log dropped DDS traffic for monitoring
iptables -A INPUT -p udp --dport 7400:7500 -j LOG --log-prefix "DDS_BLOCKED: "