Description
Vulnerability of missing input length verification in the distributed file system. Successful exploitation of this vulnerability may cause out-of-bounds read.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2023-41160
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2023-41160 pertains to a missing input length verification in a distributed file system, which can lead to an out-of-bounds read. This type of vulnerability is particularly severe because it can result in unauthorized access to sensitive information and potential system crashes.
Severity Evaluation:
- Base Score: 9.1 (CVSS:3.1)
- Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
The CVSS score of 9.1 indicates a critical vulnerability. The key metrics contributing to this high score include:
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): High (H)
- Integrity (I): None (N)
- Availability (A): High (H)
This combination suggests that the vulnerability can be exploited remotely with low complexity, requiring no special privileges or user interaction, and can have a significant impact on confidentiality and availability.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Remote Exploitation: Given the network attack vector, an attacker can exploit this vulnerability over the network without needing physical access to the device.
- Malicious Input: The vulnerability can be triggered by sending specially crafted input to the distributed file system, causing an out-of-bounds read.
Exploitation Methods:
- Crafted Requests: An attacker could send malformed requests to the file system, exploiting the lack of input length verification.
- Buffer Overflow: Although the primary issue is an out-of-bounds read, it could potentially be leveraged to cause buffer overflows, leading to more severe consequences such as arbitrary code execution.
3. Affected Systems and Software Versions
The vulnerability affects multiple versions of Huawei's HarmonyOS and EMUI:
- HarmonyOS: Versions 2.0.1, 3.1.0, and 3.0.0
- EMUI: Versions 13.0.0 and 12.0.1
These versions are used in various Huawei devices, including smartphones, tablets, and other consumer electronics.
4. Recommended Mitigation Strategies
Immediate Mitigation:
- Patching: Apply the latest security patches provided by Huawei. The references in the EUVD entry point to security bulletins that likely contain the necessary updates.
- Network Segmentation: Isolate affected devices from critical networks to limit the potential impact of an exploit.
- Input Validation: Implement additional input validation and sanitization mechanisms to mitigate the risk of malformed input.
Long-Term Mitigation:
- Regular Updates: Ensure that all devices are regularly updated with the latest security patches.
- Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
- User Training: Educate users on the importance of applying updates and recognizing potential security threats.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to European users and organizations that rely on Huawei devices running the affected software versions. Given the widespread use of Huawei products, the potential impact could be substantial, affecting both individual users and enterprise environments. The high CVSS score underscores the urgency of addressing this vulnerability to prevent large-scale data breaches and system disruptions.
6. Technical Details for Security Professionals
Technical Overview:
- Vulnerability Type: Out-of-bounds read due to missing input length verification.
- Affected Component: Distributed file system.
- Exploitation: Can be triggered by sending malformed input, leading to unauthorized access to sensitive information and potential system crashes.
Detection and Response:
- Monitoring: Implement monitoring for unusual network traffic patterns that may indicate an attempt to exploit this vulnerability.
- Logging: Ensure comprehensive logging of file system operations to detect and respond to suspicious activities.
- Incident Response: Develop an incident response plan that includes steps for identifying, containing, and remediating the vulnerability.
References:
By addressing this vulnerability promptly and comprehensively, organizations can mitigate the risk of exploitation and ensure the security and integrity of their systems.