EUVD-2025-24840

Comprehensive Technical Analysis of EUVD-2025-24840

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in the RADIUS subsystem implementation of Cisco Secure Firewall Management Center (FMC) Software is critical. It allows an unauthenticated, remote attacker to inject arbitrary shell commands, which are executed by the device. This vulnerability arises from improper handling of user input during the authentication phase, enabling command injection.

Severity Evaluation:

• CVSS Base Score: 10.0 (Critical)
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Changed (C)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)

The high severity score indicates that this vulnerability poses a significant risk to affected systems, potentially leading to complete system compromise.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability remotely without needing any prior authentication.
• Network-Based Attack: The attack can be conducted over the network, making it accessible to a wide range of potential attackers.

Exploitation Methods:

• Crafted Input: An attacker can send specially crafted input during the authentication phase, which is then processed by the RADIUS server.
• Command Injection: The crafted input can include shell commands that are executed with high privileges on the affected device.

3. Affected Systems and Software Versions

Affected Systems:

• Cisco Firepower Management Center (FMC)

Affected Software Versions:

• Version 7.7.0
• Version 7.0.7

Note: The vulnerability is only exploitable if the Cisco Secure FMC Software is configured for RADIUS authentication for the web-based management interface, SSH management, or both.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Disable RADIUS Authentication: Temporarily disable RADIUS authentication for the web-based management interface and SSH management until a patch is applied.
• Network Segmentation: Implement network segmentation to limit access to the management interfaces.
• Monitoring: Increase monitoring and logging of authentication attempts to detect and respond to suspicious activities.

Long-Term Mitigation:

• Patch Management: Apply the latest security patches and updates provided by Cisco as soon as they are available.
• Input Validation: Ensure that all user inputs are properly validated and sanitized to prevent command injection attacks.
• Access Controls: Implement strict access controls and use multi-factor authentication (MFA) for administrative access.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using Cisco Firepower Management Center, particularly those in critical infrastructure sectors such as finance, healthcare, and government. Successful exploitation could lead to unauthorized access, data breaches, and disruption of services, impacting the overall cybersecurity posture of the European Union.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2025-20265
• Vulnerability Type: Command Injection
• Root Cause: Lack of proper input handling during the authentication phase.

Exploitation Steps:

1. Identify Target: Identify a Cisco Firepower Management Center configured for RADIUS authentication.
2. Craft Input: Create a specially crafted input that includes shell commands.
3. Send Input: Send the crafted input during the authentication phase.
4. Execute Commands: The device processes the input and executes the embedded shell commands with high privileges.

Detection and Response:

• Log Analysis: Analyze authentication logs for unusual or malformed input.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious network traffic.
• Incident Response: Have an incident response plan in place to quickly address and mitigate any detected exploitation attempts.

References:

• Cisco Security Advisory

By understanding the technical details and implementing the recommended mitigation strategies, organizations can significantly reduce the risk posed by this vulnerability and enhance their overall cybersecurity posture.