CVE-2024-49747

Comprehensive Technical Analysis of CVE-2024-49747

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-49747 CVSS Score: 9.8

The vulnerability in question, CVE-2024-49747, is classified as a critical issue due to its high CVSS score of 9.8. This score indicates a severe risk to systems and users. The vulnerability is located in the gatts_process_read_by_type_req function within the gatt_sr.cc file, which is part of the Bluetooth Generic Attribute Profile (GATT) server implementation in Android. The issue arises from a logic error leading to an out-of-bounds write, which can be exploited to achieve remote code execution (RCE) without requiring additional execution privileges or user interaction.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is through Bluetooth communication. An attacker could craft a malicious GATT request that, when processed by the vulnerable function, triggers the out-of-bounds write. This could allow the attacker to execute arbitrary code on the target device. Given that user interaction is not required, the attack can be carried out silently, making it particularly dangerous.

Exploitation Methods:

• Crafted GATT Request: An attacker can send a specially crafted GATT request to the target device, exploiting the logic error in the gatts_process_read_by_type_req function.
• Proximity Attack: Since Bluetooth has a limited range, the attacker needs to be within proximity of the target device. However, this can be mitigated by using Bluetooth relay attacks.

3. Affected Systems and Software Versions

The vulnerability affects Android devices that use the Bluetooth GATT server implementation. Specific versions of the Android operating system and the Bluetooth stack are likely impacted, but the exact versions are not specified in the provided information. It is crucial to refer to the vendor advisory for detailed version information.

Affected Systems:

• Android devices with Bluetooth capabilities.
• Specific versions of the Android operating system and Bluetooth stack.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Disable Bluetooth: Users should disable Bluetooth when not in use to reduce the attack surface.
• Update Software: Apply the latest security patches and updates provided by the device manufacturer or Android.

Long-Term Mitigation:

• Patch Management: Ensure that all devices are regularly updated with the latest security patches.
• Network Segmentation: Implement network segmentation to isolate Bluetooth-enabled devices from critical systems.
• Monitoring and Detection: Use intrusion detection systems (IDS) and security information and event management (SIEM) systems to monitor for suspicious Bluetooth activity.

5. Impact on Cybersecurity Landscape

The discovery of CVE-2024-49747 highlights the ongoing challenge of securing wireless communication protocols like Bluetooth. The potential for remote code execution without user interaction underscores the need for robust security measures in mobile operating systems. This vulnerability serves as a reminder for organizations to prioritize patch management and continuous monitoring of their mobile device fleets.

Broader Implications:

• Increased Awareness: Greater emphasis on securing Bluetooth implementations and other wireless protocols.
• Patch Management: Reinforces the importance of timely patching and regular updates.
• User Education: Educating users on the risks associated with Bluetooth and the importance of disabling it when not in use.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: gatts_process_read_by_type_req
• File: gatt_sr.cc
• Issue: Logic error leading to out-of-bounds write.

Exploitation Steps:

1. Craft Malicious GATT Request: An attacker crafts a GATT request designed to trigger the logic error.
2. Send Request: The request is sent to the target device via Bluetooth.
3. Trigger Vulnerability: The vulnerable function processes the request, leading to an out-of-bounds write.
4. Execute Code: The attacker exploits the out-of-bounds write to execute arbitrary code on the target device.

Detection and Response:

• Log Analysis: Monitor Bluetooth logs for unusual activity or errors related to GATT requests.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalous behavior that may indicate an exploitation attempt.
• Incident Response: Have an incident response plan in place to quickly address and mitigate any detected exploitation attempts.

In conclusion, CVE-2024-49747 represents a significant risk to Android devices due to its potential for remote code execution. Immediate and long-term mitigation strategies, along with increased awareness and education, are essential to protect against this vulnerability and similar threats in the future.