CVE-2025-1255: RTI Connext Professional UAF Vulnerability

CVE-2025-1255 Overview

CVE-2025-1255 is an Untrusted Pointer Dereference vulnerability affecting RTI Connext Professional Core Libraries. This vulnerability allows attackers to perform pointer manipulation, potentially leading to unauthorized access to sensitive data and denial of service conditions. The vulnerability can be exploited remotely over the network without requiring authentication or user interaction.

Critical Impact

This vulnerability enables remote attackers to manipulate pointers within RTI Connext Professional, potentially causing information disclosure and service disruption in systems relying on this middleware for real-time data distribution.

Affected Products

• RTI Connext Professional versions 7.4.0 to before 7.6.0
• RTI Connext Professional versions 7.2.0 to before 7.3.0.9
• RTI Connext Professional Core Libraries

Discovery Timeline

• 2025-09-23 - CVE CVE-2025-1255 published to NVD
• 2025-10-02 - Last updated in NVD database

Technical Details for CVE-2025-1255

Vulnerability Analysis

This vulnerability is classified as CWE-822 (Untrusted Pointer Dereference), which occurs when a program dereferences a pointer that is not trusted to be valid. In the context of RTI Connext Professional, this vulnerability exists within the Core Libraries component, which handles critical data distribution functionality.

The attack vector is network-based, meaning an attacker can exploit this vulnerability remotely without requiring local access to the target system. The vulnerability does not require any privileges or user interaction to exploit, though exploitation does depend on certain preconditions being met.

When successfully exploited, this vulnerability can result in high impact to both confidentiality and availability. An attacker could potentially read sensitive memory contents (information disclosure) or cause the application to crash (denial of service). The integrity of the system remains unaffected by this vulnerability.

Root Cause

The root cause of this vulnerability lies in improper validation of pointer values within the RTI Connext Professional Core Libraries. When processing certain inputs, the library fails to adequately verify that pointer values originate from trusted sources before dereferencing them. This allows an attacker to supply crafted input that causes the application to dereference arbitrary memory locations.

Untrusted pointer dereference vulnerabilities typically occur when external input is used to construct or modify pointer values without proper bounds checking or validation. In this case, the vulnerability affects the data distribution middleware's core functionality.

Attack Vector

The attack can be initiated remotely over the network, targeting systems running vulnerable versions of RTI Connext Professional. An attacker would craft malicious network traffic designed to exploit the pointer dereference vulnerability.

The exploitation flow involves:

1. The attacker identifies a system running a vulnerable version of RTI Connext Professional
2. Malicious network packets are crafted to manipulate pointer values within the Core Libraries
3. The vulnerable library processes the malicious input and dereferences the untrusted pointer
4. This results in either unauthorized memory access (information disclosure) or application crash (denial of service)

For detailed technical information about this vulnerability, refer to the RTI Security Advisory.

Detection Methods for CVE-2025-1255

Indicators of Compromise

• Unexpected crashes or restarts of applications using RTI Connext Professional libraries
• Anomalous network traffic patterns targeting RTI Connext communication ports
• Memory access violations or segmentation faults in application logs
• Unusual memory consumption patterns in processes using Connext libraries

Detection Strategies

• Monitor network traffic for malformed or suspicious packets targeting RTI Connext Professional endpoints
• Implement application-level logging to detect unusual pointer-related errors or memory access violations
• Deploy network intrusion detection systems (NIDS) with signatures for RTI protocol anomalies
• Use endpoint detection and response (EDR) solutions to identify exploitation attempts

Monitoring Recommendations

• Enable verbose logging in RTI Connext Professional applications to capture detailed error information
• Monitor system logs for signs of application crashes related to Connext libraries
• Implement network segmentation to isolate systems running RTI Connext Professional
• Establish baseline behavior for Connext-based applications to detect anomalies

How to Mitigate CVE-2025-1255

Immediate Actions Required

• Identify all systems running vulnerable versions of RTI Connext Professional (7.4.0 to 7.5.x and 7.2.0 to 7.3.0.8)
• Prioritize patching systems exposed to untrusted networks
• Implement network access controls to restrict access to RTI Connext endpoints
• Monitor affected systems for signs of exploitation attempts

Patch Information

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

• For the 7.4.x branch: Upgrade to RTI Connext Professional version 7.6.0 or later
• For the 7.2.x branch: Upgrade to RTI Connext Professional version 7.3.0.9 or later

Detailed patch information is available from the RTI Security Vulnerability page.

Workarounds

• Restrict network access to RTI Connext Professional services to trusted hosts only using firewall rules
• Implement network segmentation to isolate systems running vulnerable versions
• Deploy application-layer firewalls capable of inspecting RTI protocol traffic
• Consider disabling unused network interfaces on affected systems until patches can be applied

# Example: Restrict access to RTI Connext ports using iptables
# Adjust port numbers based on your RTI configuration
iptables -A INPUT -p udp --dport 7400:7500 -s trusted_network/24 -j ACCEPT
iptables -A INPUT -p udp --dport 7400:7500 -j DROP
iptables -A INPUT -p tcp --dport 7400:7500 -s trusted_network/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 7400:7500 -j DROP