EUVD-2024-17794

Comprehensive Technical Analysis of EUVD-2024-17794

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-17794 pertains to an out-of-bounds write issue in the gnss service due to improper input validation. This flaw can lead to a local escalation of privilege, allowing an attacker to gain System execution privileges without requiring user interaction. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The CVSS vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• AV:N (Attack Vector: Network) - The vulnerability is exploitable over the network.
• AC:L (Attack Complexity: Low) - The attack is relatively simple to execute.
• PR:N (Privileges Required: None) - No special privileges are required to exploit the vulnerability.
• UI:N (User Interaction: None) - No user interaction is needed for exploitation.
• S:U (Scope: Unchanged) - The vulnerability does not change the security scope.
• C:H (Confidentiality: High) - There is a high impact on confidentiality.
• I:H (Integrity: High) - There is a high impact on integrity.
• A:H (Availability: High) - There is a high impact on availability.

Given these factors, the vulnerability poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is network-based, meaning an attacker can exploit it remotely. The low attack complexity and lack of required user interaction make it particularly dangerous. Potential exploitation methods include:

• Remote Code Execution (RCE): An attacker could send specially crafted input to the gnss service, leading to an out-of-bounds write. This could allow the attacker to execute arbitrary code with elevated privileges.
• Privilege Escalation: Once the attacker gains initial access, they could escalate their privileges to System level, allowing them to perform unauthorized actions on the affected device.

3. Affected Systems and Software Versions

The vulnerability affects a wide range of MediaTek products running specific versions of Android:

• Products: MT6761, MT6765, MT6768, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6891, MT6893, MT6895, MT6983, MT6985, MT6989, MT8666, MT8667, MT8673, MT8676, MT8678
• Software Versions: Android 13.0, 14.0

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Apply Patch: Ensure that the affected devices are updated with the patch identified by Patch ID: ALPS08044040.
• Network Segmentation: Implement network segmentation to limit the attack surface and reduce the risk of lateral movement by attackers.
• Input Validation: Enhance input validation mechanisms to prevent out-of-bounds writes.
• Monitoring and Logging: Implement robust monitoring and logging to detect and respond to any suspicious activities.
• Access Controls: Enforce strict access controls and least privilege principles to minimize the potential impact of an exploit.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant threat to the European cybersecurity landscape, particularly given the widespread use of MediaTek products in various consumer and industrial devices. The potential for remote exploitation and privilege escalation could lead to widespread compromises, affecting both individual users and organizations. The high CVSS score underscores the urgency for immediate action to mitigate the risk.

6. Technical Details for Security Professionals

• Vulnerability Type: Out-of-bounds write due to improper input validation.
• Affected Component: gnss service.
• Exploitation Requirements: Network access, no user interaction.
• Impact: Local escalation of privilege with System execution privileges.
• Patch Information: Patch ID: ALPS08044040; Issue ID: MSV-1491.
• References: MediaTek Product Security Bulletin

Security professionals should prioritize the application of the available patch and conduct thorough testing to ensure that the vulnerability is effectively mitigated. Regular security audits and vulnerability assessments should be performed to identify and address similar issues proactively.

Conclusion

EUVD-2024-17794 represents a critical vulnerability that requires immediate attention from cybersecurity professionals. The potential for remote exploitation and privilege escalation makes it a high-priority issue. Affected organizations should implement the recommended mitigation strategies and ensure that all affected devices are updated with the latest patches to protect against potential attacks.