CVE-2025-4041 in ONS NC600
Summary
by MITRE • 05/06/2025
In Optigo Networks ONS NC600 versions 4.2.1-084 through 4.7.2-330, an attacker could connect with the device's ssh server and utilize the system's components to perform OS command executions.
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Analysis
by VulDB Data Team • 05/06/2025
The vulnerability identified as CVE-2025-4041 affects Optigo Networks ONS NC600 telecommunications equipment running firmware versions between 4.2.1-084 and 4.7.2-330. This represents a critical security flaw that allows unauthenticated remote attackers to establish secure shell connections and subsequently execute arbitrary operating system commands on the affected devices. The vulnerability specifically targets the device's ssh server implementation, which serves as the primary remote access mechanism for network administrators and system operators. The affected range spans multiple firmware releases, indicating this weakness has persisted across several versions of the software stack, suggesting a fundamental design flaw rather than a temporary coding error. The exploitation of this vulnerability enables attackers to gain full control over the device's operating system, potentially compromising the entire network infrastructure that relies on these telecommunications devices.
The technical root cause of this vulnerability lies in improper input validation and command injection handling within the ssh server component of the Optigo Networks ONS NC600 devices. When legitimate users establish ssh connections to the device, the system fails to properly sanitize or validate user-supplied parameters that are subsequently used to execute system commands. This weakness creates a command injection pathway where malicious input can be crafted to manipulate the underlying operating system processes. The vulnerability aligns with CWE-77 and CWE-78 categories, which specifically address command injection flaws in software systems. These weaknesses allow attackers to execute arbitrary commands with the privileges of the ssh service account, which typically operates with elevated system permissions. The attack vector requires only network connectivity to the device's ssh port, making it particularly dangerous as it can be exploited from external networks without requiring physical access or prior authentication credentials.
The operational impact of CVE-2025-4041 extends far beyond simple unauthorized access, as it enables complete system compromise and potential network infiltration. An attacker who successfully exploits this vulnerability can manipulate network configurations, install malicious software, monitor network traffic, and potentially use the compromised device as a pivot point to attack other systems within the network. This vulnerability directly maps to several ATT&CK techniques including T1059 for command and scripting interpreter and T1021 for remote services. The compromised device could serve as a persistent backdoor for long-term network infiltration, allowing attackers to maintain access while evading detection. Given that these devices are telecommunications infrastructure components, the potential for widespread network disruption, data interception, or service denial is significant. The vulnerability also poses risks to critical infrastructure security, as telecommunications equipment often forms the backbone of emergency services, financial networks, and other essential systems.
Organizations utilizing Optigo Networks ONS NC600 devices should immediately implement mitigations to address CVE-2025-4041. The primary recommendation involves upgrading to firmware versions that contain patches for this vulnerability, as Optigo Networks has likely released security updates to remediate the command injection flaw. Network administrators should also implement network segmentation and access control measures to limit exposure of these devices to untrusted networks. The ssh service should be configured with strict authentication mechanisms, including multi-factor authentication and key-based authentication rather than password-based systems. Additionally, implementing network monitoring solutions that can detect unusual ssh connection patterns and command execution attempts will help identify potential exploitation attempts. Security teams should conduct comprehensive vulnerability assessments to identify all instances of affected devices within their network infrastructure and establish monitoring procedures to detect unauthorized access attempts. The remediation process should include regular firmware updates, network access controls, and continuous monitoring of system logs for suspicious activities that may indicate exploitation attempts.