Description
The web interface of the affected devices processes a cookie value improperly, leading to a stack buffer overflow. More precisely, giving too long character string to MFPSESSIONID parameter results in a stack buffer overflow. As for the details of affected product names, model numbers, and versions, refer to the information provided by the respective vendors listed under [References].
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2024-34435
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2024-34435 involves a stack buffer overflow in the web interface of affected multifunction printers (MFPs). This issue arises from improper processing of the MFPSESSIONID cookie parameter, specifically when it is given an excessively long character string. The CVSS (Common Vulnerability Scoring System) base score of 9.0 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H breaks down as follows:
- Attack Vector (AV:N): Network, meaning the vulnerability is exploitable remotely.
- Attack Complexity (AC:H): High, indicating that specialized conditions are required for exploitation.
- Privileges Required (PR:N): None, meaning no privileges are needed to exploit the vulnerability.
- User Interaction (UI:N): None, meaning no user interaction is required.
- Scope (S:C): Changed, indicating the vulnerability can affect resources beyond the security scope managed by the security authority.
- Confidentiality (C:H): High impact on confidentiality.
- Integrity (I:H): High impact on integrity.
- Availability (A:H): High impact on availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector is through the web interface of the affected MFPs. An attacker could exploit this vulnerability by:
- Crafting a Malicious Cookie: Creating a specially crafted
MFPSESSIONIDcookie with an excessively long character string. - Sending the Cookie: Transmitting this cookie to the web interface of the MFP, potentially via a web request.
- Triggering the Overflow: The long character string causes a stack buffer overflow, leading to potential code execution or denial of service (DoS).
3. Affected Systems and Software Versions
The affected systems include multiple models of MFPs from Sharp Corporation and Toshiba Tec Corporation. Specific product names, model numbers, and versions are detailed in the references provided by the respective vendors. It is crucial to consult the vendor-specific information for precise identification of affected devices.
4. Recommended Mitigation Strategies
To mitigate this vulnerability, the following strategies are recommended:
- Patch Management: Apply the latest firmware updates provided by Sharp Corporation and Toshiba Tec Corporation.
- Network Segmentation: Isolate MFPs on a separate network segment to limit exposure to potential attackers.
- Firewall Rules: Implement strict firewall rules to restrict access to the web interface of the MFPs.
- Input Validation: Ensure that input validation mechanisms are in place to prevent excessively long strings from being processed.
- Monitoring and Logging: Enhance monitoring and logging of network traffic to detect and respond to suspicious activities.
5. Impact on European Cybersecurity Landscape
The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of MFPs in various sectors, including government, healthcare, and finance. The potential for remote exploitation and high impact on confidentiality, integrity, and availability makes it a critical concern. Organizations must prioritize patching and implementing robust security measures to protect against such vulnerabilities.
6. Technical Details for Security Professionals
- Vulnerability Type: Stack Buffer Overflow
- Affected Parameter:
MFPSESSIONIDcookie - Exploitation Method: Sending a long character string to the
MFPSESSIONIDparameter - Impact: Potential code execution or denial of service (DoS)
- Mitigation: Apply vendor-specific patches and implement network security best practices
Conclusion
EUVD-2024-34435 represents a critical vulnerability affecting multiple MFPs from Sharp Corporation and Toshiba Tec Corporation. The stack buffer overflow in the web interface can lead to severe consequences, including remote code execution and denial of service. Organizations must prioritize applying the latest firmware updates and implementing robust security measures to mitigate this risk. The European cybersecurity landscape must remain vigilant against such vulnerabilities to protect sensitive information and ensure the integrity of critical systems.