EUVD-2024-44623

Comprehensive Technical Analysis of EUVD-2024-44623

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-44623 is a command injection flaw in the Aviatrix Controller software. This issue allows an unauthenticated attacker to execute arbitrary code by sending shell metacharacters to specific API endpoints. The severity of this vulnerability is rated at a Base Score of 10.0 according to CVSS 3.1, indicating a critical risk. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H highlights the following:

• Attack Vector (AV:N): The vulnerability is exploitable over the network.
• Attack Complexity (AC:L): The attack requires low complexity.
• Privileges Required (PR:N): No privileges are required to exploit the vulnerability.
• User Interaction (UI:N): No user interaction is required.
• Scope (S:C): The vulnerability affects a component that is outside the security scope of the vulnerable component.
• Confidentiality (C:H): The vulnerability has a high impact on confidentiality.
• Integrity (I:H): The vulnerability has a high impact on integrity.
• Availability (A:H): The vulnerability has a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves sending specially crafted input to the /v1/api endpoint, specifically targeting the cloud_type parameter for list_flightpath_destination_instances or the src_cloud_type parameter for flightpath_connection_test. An attacker can inject shell metacharacters into these parameters, leading to arbitrary code execution.

Potential exploitation methods include:

• Direct Command Injection: An attacker can inject commands directly into the API parameters, leading to the execution of arbitrary shell commands on the underlying operating system.
• Chained Exploits: The attacker could use this vulnerability as part of a larger attack chain, potentially leading to further compromise of the network or other connected systems.

3. Affected Systems and Software Versions

The vulnerability affects the following versions of the Aviatrix Controller:

• Versions before 7.1.4191
• Versions 7.2.x before 7.2.4996

Organizations using these versions are at risk and should prioritize updating to the patched versions.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following steps are recommended:

• Update Software: Immediately update to Aviatrix Controller version 7.1.4191 or 7.2.4996, or later versions that include the security patch.
• Network Segmentation: Implement network segmentation to limit the exposure of the Aviatrix Controller to untrusted networks.
• Input Validation: Ensure that all input to the API endpoints is properly validated and sanitized to prevent command injection.
• Monitoring and Logging: Enhance monitoring and logging to detect any suspicious activities or attempts to exploit the vulnerability.
• Access Controls: Implement strict access controls to limit who can interact with the Aviatrix Controller API.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations within the European Union that rely on Aviatrix Controller for network management. Given the critical nature of the vulnerability, it could lead to widespread compromise if not addressed promptly. The high EPSS score of 94 indicates a high likelihood of exploitation, making it a priority for cybersecurity teams to address.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2024-50603
• Affected Parameters: cloud_type for list_flightpath_destination_instances, src_cloud_type for flightpath_connection_test
• Exploitation: Injection of shell metacharacters into API parameters leading to arbitrary code execution.

Detection and Response:

• Detection: Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to monitor for unusual API requests and shell command execution.
• Response: Develop an incident response plan that includes steps for isolating affected systems, patching vulnerabilities, and conducting forensic analysis to determine the extent of the compromise.

References:

• Aviatrix Network Security Documentation
• Aviatrix PSIRT Advisories
• Securing.pl Analysis

By following these recommendations and staying vigilant, organizations can significantly reduce the risk posed by this critical vulnerability.