Description
The Toshiba printers provide several ways to upload files using the web interface without authentication. An attacker can overwrite any insecure files. And the Toshiba printers are vulnerable to a Local Privilege Escalation vulnerability. An attacker can remotely compromise any Toshiba printer. The programs can be replaced by malicious programs by any local or remote attacker. This vulnerability can be executed in combination with other vulnerabilities and difficult to execute alone. So, the CVSS score for this vulnerability alone is lower than the score listed in the "Base Score" of this vulnerability. For detail on related other vulnerabilities, please ask to the below contact point. https://www.toshibatec.com/contacts/products/ As for the affected products/models/versions, see the reference URL.
EPSS Score:
2%
Comprehensive Technical Analysis of EUVD-2024-24385
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2024-24385 affects Toshiba printers, specifically the Toshiba Tec e-Studio multi-function peripheral (MFP). The vulnerability allows unauthenticated file uploads via the web interface, which can lead to overwriting insecure files and local privilege escalation. This can result in remote compromise of the printer, enabling attackers to replace legitimate programs with malicious ones.
Severity Evaluation:
- CVSS Base Score: 9.8
- CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The high CVSS score indicates a critical vulnerability due to the following factors:
- Attack Vector (AV:N): Network-based attack.
- Attack Complexity (AC:L): Low complexity required for exploitation.
- Privileges Required (PR:N): No privileges required.
- User Interaction (UI:N): No user interaction required.
- Scope (S:U): Unchanged.
- Confidentiality (C:H), Integrity (I:H), Availability (A:H): High impact on all three.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Unauthenticated File Upload: An attacker can upload malicious files to the printer's web interface without authentication.
- Local Privilege Escalation: Once a malicious file is uploaded, an attacker can escalate privileges to gain full control over the printer.
- Remote Compromise: The attacker can remotely compromise the printer by replacing legitimate programs with malicious ones.
Exploitation Methods:
- File Overwrite: Uploading a malicious file to overwrite existing files.
- Malicious Program Replacement: Replacing legitimate printer programs with malicious ones to execute arbitrary code.
- Combination with Other Vulnerabilities: This vulnerability can be combined with other vulnerabilities to increase the attack surface and impact.
3. Affected Systems and Software Versions
The affected products include Toshiba Tec e-Studio multi-function peripherals (MFPs). For specific models and versions, refer to the provided reference URLs:
4. Recommended Mitigation Strategies
- Firmware Update: Ensure that all affected Toshiba printers are updated to the latest firmware version provided by Toshiba.
- Network Segmentation: Isolate printers on a separate network segment to limit access.
- Access Control: Implement strict access controls to restrict who can access the printer's web interface.
- Monitoring and Logging: Enable logging and monitoring of printer activities to detect any suspicious behavior.
- Disable Unnecessary Services: Disable any unnecessary services or features on the printer to reduce the attack surface.
- Regular Security Audits: Conduct regular security audits and vulnerability assessments of all networked devices, including printers.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to organizations across Europe that use Toshiba printers. The potential for remote compromise and the ability to execute malicious code can lead to data breaches, unauthorized access, and disruption of business operations. This underscores the importance of securing IoT devices and ensuring that all networked devices are regularly updated and monitored.
6. Technical Details for Security Professionals
Technical Analysis:
- File Upload Mechanism: Investigate the web interface's file upload mechanism to identify and mitigate vulnerabilities.
- Privilege Escalation: Analyze the printer's firmware and software to understand how privilege escalation can occur and implement mitigations.
- Remote Code Execution: Ensure that all executable files and programs on the printer are secured and cannot be easily replaced.
Detection and Response:
- Intrusion Detection Systems (IDS): Deploy IDS to detect unusual network traffic to and from the printer.
- Incident Response Plan: Develop and implement an incident response plan specific to printer vulnerabilities.
- Patch Management: Ensure a robust patch management process to quickly apply updates and patches from the vendor.
References:
By addressing these points, organizations can significantly reduce the risk associated with this vulnerability and enhance their overall cybersecurity posture.