CVE-2024-45434: Blue SDK Use-After-Free Vulnerability

CVE-2024-45434 Overview

CVE-2024-45434 is a critical Use-After-Free vulnerability affecting OpenSynergy BlueSDK (also known as Blue SDK) through version 6.x. The flaw exists within the BlueSDK Bluetooth stack and stems from the lack of validation for object existence before performing operations on it. This memory corruption vulnerability allows an attacker to leverage the use-after-free condition to achieve remote code execution in the context of the user account under which the Bluetooth process runs.

Critical Impact

This vulnerability enables unauthenticated remote attackers to execute arbitrary code on affected systems via the network, potentially leading to complete system compromise without any user interaction.

Affected Products

• OpenSynergy Blue SDK through version 6.x
• Systems and devices implementing the BlueSDK Bluetooth stack
• Embedded systems and automotive platforms using OpenSynergy Bluetooth solutions

Discovery Timeline

• 2025-09-12 - CVE-2024-45434 published to NVD
• 2025-10-02 - Last updated in NVD database

Technical Details for CVE-2024-45434

Vulnerability Analysis

This Use-After-Free (CWE-416) vulnerability exists within the BlueSDK Bluetooth stack's memory management routines. The fundamental issue is that the software fails to properly validate whether an object still exists in memory before attempting to perform operations on it. When memory is freed but a pointer to that memory is retained and subsequently dereferenced, an attacker can manipulate the heap to place controlled data at the freed memory location.

In the context of BlueSDK, this vulnerability can be triggered remotely over the network, making it particularly dangerous for Bluetooth-enabled devices. The attack requires no prior authentication and no user interaction, significantly lowering the barrier for exploitation. Successful exploitation results in code execution with the privileges of the Bluetooth process, which could allow lateral movement or further privilege escalation depending on the system configuration.

Root Cause

The root cause of CVE-2024-45434 lies in improper memory lifecycle management within the BlueSDK Bluetooth stack. Specifically, the code fails to nullify pointers after freeing associated memory objects, or continues to reference objects after they have been deallocated. This creates a window where an attacker can reallocate the freed memory with malicious data before the stale pointer is dereferenced, achieving arbitrary code execution.

Attack Vector

The attack vector is network-based, allowing remote exploitation without authentication. An attacker can craft malicious Bluetooth protocol messages or network packets that trigger the vulnerable code path. By carefully timing memory operations and controlling heap allocations, the attacker can manipulate the freed memory region to contain shellcode or a crafted object that redirects execution flow.

The exploitation process typically involves:

1. Sending specially crafted requests to trigger the memory free operation
2. Reallocating the freed memory region with attacker-controlled data
3. Triggering the use of the stale pointer to execute the injected payload

For detailed technical information about this vulnerability, refer to the PCA Cybersecurity Advisory.

Detection Methods for CVE-2024-45434

Indicators of Compromise

• Unexpected crashes or restarts of Bluetooth-related services or processes
• Anomalous memory allocation patterns in processes utilizing the BlueSDK stack
• Unusual network traffic targeting Bluetooth service ports
• Evidence of code execution from heap memory regions in crash dumps

Detection Strategies

• Monitor Bluetooth process behavior for signs of memory corruption such as access violations or heap corruption errors
• Implement network intrusion detection rules for malformed Bluetooth protocol messages
• Deploy endpoint detection and response (EDR) solutions capable of identifying use-after-free exploitation patterns
• Analyze system logs for repeated service crashes that may indicate exploitation attempts

Monitoring Recommendations

• Enable detailed logging for Bluetooth services and related network communications
• Configure alerts for abnormal process termination events involving Bluetooth components
• Monitor for unauthorized code execution attempts from user-space processes associated with Bluetooth functionality
• Implement heap integrity monitoring where feasible on critical systems

How to Mitigate CVE-2024-45434

Immediate Actions Required

• Identify all systems and devices using OpenSynergy BlueSDK through version 6.x
• Prioritize patching based on network exposure and criticality of affected systems
• Consider disabling Bluetooth functionality on critical systems until patches are applied
• Implement network segmentation to limit exposure of vulnerable Bluetooth services

Patch Information

Organizations should contact OpenSynergy directly for patching information and updated versions of the Blue SDK that address this vulnerability. Visit the OpenSynergy Homepage for vendor contact information and support resources. Additionally, review the PCA Cybersecurity Advisory for further guidance.

Workarounds

• Disable Bluetooth services on systems where they are not required until a patch is available
• Implement strict network access controls to limit exposure of Bluetooth-enabled interfaces
• Deploy application-level firewalls or intrusion prevention systems to filter potentially malicious Bluetooth traffic
• Isolate systems running vulnerable BlueSDK versions in segmented network zones

# Example: Disable Bluetooth service on Linux systems as a temporary workaround
sudo systemctl stop bluetooth
sudo systemctl disable bluetooth