Description
Contec Health CMS8000 Patient Monitor is vulnerable to an out-of-bounds write, which could allow an attacker to send specially formatted UDP requests in order to write arbitrary data. This could result in remote code execution.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2024-50712
1. Vulnerability Assessment and Severity Evaluation
The vulnerability in the Contec Health CMS8000 Patient Monitor, identified as EUVD-2024-50712 (CVE-2024-12248), involves an out-of-bounds write flaw. This type of vulnerability can allow an attacker to send specially crafted UDP requests to write arbitrary data, potentially leading to remote code execution (RCE). The severity of this vulnerability is rated with a CVSS base score of 9.3, indicating a critical risk.
CVSS Vector Breakdown:
- AV:N (Network Vector): The vulnerability is exploitable over the network.
- AC:L (Low Complexity): The attack requires low skill or resources to exploit.
- AT:N (No Authentication): No authentication is required to exploit the vulnerability.
- PR:N (No Privileges Required): No special privileges are needed.
- UI:N (No User Interaction): No user interaction is required.
- VC:H (High Confidentiality Impact): The vulnerability can result in a high impact on confidentiality.
- VI:H (High Integrity Impact): The vulnerability can result in a high impact on integrity.
- VA:H (High Availability Impact): The vulnerability can result in a high impact on availability.
- SC:N (No Security Requirements): No security requirements are affected.
- SI:N (No Integrity Requirements): No integrity requirements are affected.
- SA:N (No Availability Requirements): No availability requirements are affected.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Network-Based Attacks: Given the vulnerability is exploitable over the network, attackers can target the device remotely.
- UDP Protocol: The attacker can send malicious UDP packets to the affected device.
Exploitation Methods:
- Crafted UDP Requests: An attacker can craft UDP packets designed to trigger the out-of-bounds write condition.
- Arbitrary Data Writing: By exploiting the vulnerability, an attacker can write arbitrary data to memory, potentially leading to code execution.
3. Affected Systems and Software Versions
The vulnerability affects the following versions of the Contec Health CMS8000 Patient Monitor:
- Firmware version smart3250-2.6.27-wlan2.1.7.cramfs
- Firmware version CMS7.820.120.01/0.93(0.95)
- Firmware version CMS7.820.075.08/0.74(0.75)
4. Recommended Mitigation Strategies
Immediate Mitigation:
- Network Segmentation: Isolate the affected devices from the broader network to limit exposure.
- Firewall Rules: Implement strict firewall rules to block unsolicited UDP traffic to the affected devices.
- Monitoring: Increase monitoring and logging of network traffic to detect any suspicious activity.
Long-Term Mitigation:
- Firmware Updates: Apply vendor-provided firmware updates as soon as they become available.
- Patch Management: Implement a robust patch management program to ensure timely updates.
- Security Audits: Conduct regular security audits and vulnerability assessments.
5. Impact on European Cybersecurity Landscape
The vulnerability in the Contec Health CMS8000 Patient Monitor poses a significant risk to healthcare institutions across Europe. Given the critical nature of patient monitoring devices, a successful exploit could lead to:
- Patient Safety Risks: Compromised devices could provide incorrect readings, leading to misdiagnosis or delayed treatment.
- Data Breaches: Sensitive patient data could be exposed or manipulated.
- Operational Disruptions: Healthcare services could be disrupted, affecting patient care and operational efficiency.
6. Technical Details for Security Professionals
Detection:
- Network Intrusion Detection Systems (NIDS): Deploy NIDS to detect anomalous UDP traffic targeting the affected devices.
- Log Analysis: Regularly analyze logs for any unusual activity or patterns indicative of exploitation attempts.
Response:
- Incident Response Plan: Develop and maintain an incident response plan tailored to medical device vulnerabilities.
- Coordination: Collaborate with healthcare IT teams and medical device manufacturers to ensure timely and effective response.
Prevention:
- Regular Audits: Conduct regular security audits and vulnerability assessments.
- Training: Provide training to healthcare staff on recognizing and reporting potential security incidents.
References:
By addressing this vulnerability promptly and comprehensively, healthcare institutions can mitigate the risks associated with the Contec Health CMS8000 Patient Monitor and ensure the safety and security of their patients and operations.