EUVD-2024-17796

Comprehensive Technical Analysis of EUVD-2024-17796

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-17796 pertains to a potential out-of-bounds write in the gnss (Global Navigation Satellite System) service due to improper input validation. This flaw can lead to local escalation of privilege, allowing an attacker to gain System execution privileges without requiring user interaction.

Severity Evaluation:

• CVSS Base Score: 9.8 (Critical)
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high base score indicates a critical vulnerability due to the following factors:

• Attack Vector (AV:N): Network-based attack vector.
• Attack Complexity (AC:L): Low complexity required for exploitation.
• Privileges Required (PR:N): No privileges are required.
• User Interaction (UI:N): No user interaction is needed.
• Scope (S:U): Unchanged scope.
• Confidentiality (C:H), Integrity (I:H), Availability (A:H): High impact on all three CIA triad components.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: Given the network-based attack vector, an attacker could exploit this vulnerability remotely.
• Local Exploitation: The vulnerability allows for local escalation of privilege, meaning an attacker with local access could elevate their privileges to System level.

Exploitation Methods:

• Crafted Input: An attacker could send specially crafted input to the gnss service, triggering the out-of-bounds write.
• Memory Corruption: The out-of-bounds write could lead to memory corruption, allowing the attacker to execute arbitrary code with elevated privileges.

3. Affected Systems and Software Versions

Affected Products:

• MediaTek chipsets: MT2735, MT2737, MT6761, MT6765, MT6768, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6980, MT6983, MT6985, MT6989, MT6990, MT8666, MT8667, MT8673, MT8676, MT8678

Affected Software Versions:

• Android: 13.0, 14.0
• openWRT: 19.07, 21.02, 23.05
• Yocto: 2.6, 3.3, 4.0
• RDK-B: 22Q3

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Application: Apply the patch identified by Patch ID: ALPS08719602.
• System Updates: Ensure all affected systems are updated to the latest software versions that include the necessary fixes.

Long-Term Strategies:

• Input Validation: Implement robust input validation mechanisms to prevent out-of-bounds writes.
• Memory Protection: Use memory protection techniques such as Address Space Layout Randomization (ASLR) and Data Execution Prevention (DEP).
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for devices and systems utilizing MediaTek chipsets. The potential for remote exploitation and privilege escalation could lead to widespread compromise of affected devices, impacting both individual users and organizations.

Sector-Specific Impacts:

• Telecommunications: Potential disruption in telecommunication services due to compromised devices.
• IoT Devices: Increased risk for IoT devices using the affected chipsets, leading to potential data breaches and unauthorized access.
• Consumer Electronics: Compromise of consumer electronics, leading to privacy and security concerns for end-users.

6. Technical Details for Security Professionals

Vulnerability Details:

• Cause: Improper input validation leading to an out-of-bounds write in the gnss service.
• Effect: Local escalation of privilege with System execution privileges.
• Exploitation: No user interaction required; can be exploited remotely.

Detection and Response:

• Monitoring: Implement monitoring for unusual activity in the gnss service.
• Logging: Enable detailed logging to detect and respond to potential exploitation attempts.
• Incident Response: Develop an incident response plan specific to this vulnerability, including steps for containment, eradication, and recovery.

References:

• Security Bulletin: MediaTek Product Security Bulletin - July 2024
• Aliases: CVE-2024-20081, GSD-2024-20081

By addressing this vulnerability promptly and comprehensively, organizations can mitigate the risk of exploitation and ensure the security and integrity of their systems.