Description
Buffer overflow in WSD probe request process of Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger the affected product being unresponsive or to execute arbitrary code.*: Satera LBP670C Series/Satera MF750C Series firmware v03.07 and earlier sold in Japan. Color imageCLASS LBP674C/Color imageCLASS X LBP1333C/Color imageCLASS MF750C Series/Color imageCLASS X MF1333C Series firmware v03.07 and earlier sold in US. i-SENSYS LBP673Cdw/C1333P/i-SENSYS MF750C Series/C1333i Series firmware v03.07 and earlier sold in Europe.
EPSS Score:
1%
Comprehensive Technical Analysis of EUVD-2023-58478
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2023-58478 is a buffer overflow in the WSD (Web Services for Devices) probe request process of various Canon Office Multifunction Printers and Laser Printers. This vulnerability has a CVSS (Common Vulnerability Scoring System) base score of 9.8, which is classified as critical. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates the following:
- Attack Vector (AV:N): The vulnerability can be exploited remotely over the network.
- Attack Complexity (AC:L): The attack requires low complexity to exploit.
- Privileges Required (PR:N): No privileges are required to exploit the vulnerability.
- User Interaction (UI:N): No user interaction is required.
- Scope (S:U): The vulnerability affects the same security scope.
- Confidentiality (C:H): High impact on confidentiality.
- Integrity (I:H): High impact on integrity.
- Availability (A:H): High impact on availability.
Given these metrics, the vulnerability is highly severe and poses a significant risk to affected devices.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector is through network access to the affected printers. An attacker on the same network segment can send specially crafted WSD probe requests to the vulnerable devices. Potential exploitation methods include:
- Denial of Service (DoS): By sending malformed WSD probe requests, an attacker can cause the printer to become unresponsive, effectively rendering it unusable.
- Arbitrary Code Execution: The buffer overflow can be exploited to execute arbitrary code on the printer, potentially leading to further compromise of the network or data exfiltration.
3. Affected Systems and Software Versions
The vulnerability affects multiple models and firmware versions of Canon printers sold in different regions:
- Japan: Satera LBP670C Series/Satera MF750C Series firmware v03.07 and earlier.
- US: Color imageCLASS LBP674C/Color imageCLASS X LBP1333C/Color imageCLASS MF750C Series/Color imageCLASS X MF1333C Series firmware v03.07 and earlier.
- Europe: i-SENSYS LBP673Cdw/C1333P/i-SENSYS MF750C Series/C1333i Series firmware v03.07 and earlier.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Firmware Update: Immediately update the firmware of affected printers to the latest version provided by Canon. This is the most effective mitigation strategy.
- Network Segmentation: Isolate printers on a separate network segment to limit access and reduce the attack surface.
- Firewall Rules: Implement strict firewall rules to restrict access to the printers, allowing only necessary traffic.
- Monitoring and Logging: Enable logging and monitoring of network traffic to and from the printers to detect any suspicious activity.
- Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security issues.
5. Impact on European Cybersecurity Landscape
The vulnerability affects a wide range of Canon printers, including those sold in Europe. Given the critical nature of the vulnerability, it poses a significant risk to organizations and individuals using these devices. The potential for arbitrary code execution and denial of service attacks can lead to data breaches, operational disruptions, and financial losses. Organizations in Europe should prioritize updating their printers and implementing robust security measures to protect against this vulnerability.
6. Technical Details for Security Professionals
- Vulnerability Type: Buffer overflow in the WSD probe request process.
- Exploitation: Requires network access to the affected printer. Exploitation can lead to denial of service or arbitrary code execution.
- Detection: Monitor network traffic for unusual WSD probe requests. Implement intrusion detection systems (IDS) to detect and alert on suspicious activity.
- Response: In case of a suspected exploitation, isolate the affected printer immediately and perform a forensic analysis to determine the extent of the compromise.
- Patching: Ensure that all affected printers are updated to the latest firmware version provided by Canon. Verify the integrity of the firmware update to prevent tampering.
Conclusion
EUVD-2023-58478 is a critical vulnerability affecting multiple models of Canon printers. Organizations should prioritize updating their printers and implementing robust security measures to mitigate the risk. Regular monitoring, logging, and security audits are essential to detect and respond to potential exploitation attempts. The European cybersecurity landscape must remain vigilant and proactive in addressing such vulnerabilities to protect against potential threats.