CVE-2012-2439 in ProSafe FVS318N
Summary
by MITRE
The default configuration of the NETGEAR ProSafe FVS318N firewall enables web-based administration on the WAN interface, which allows remote attackers to establish an HTTP connection and possibly have unspecified other impact via unknown vectors.
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Analysis
by VulDB Data Team • 08/09/2024
The CVE-2012-2439 vulnerability represents a critical configuration flaw in NETGEAR ProSafe FVS318N firewall devices that exposes administrative interfaces to unauthorized remote access. This vulnerability stems from the device's default configuration where the web-based administration interface remains accessible from the Wide Area Network interface, creating an inherent security risk that violates fundamental network security principles. The flaw essentially allows attackers to establish direct HTTP connections to the firewall's administrative interface from external networks, bypassing the intended security boundaries that should separate internal trusted networks from external untrusted networks. This configuration directly contravenes the principle of least privilege and network segmentation that are essential components of secure network architecture. The vulnerability's impact extends beyond simple remote access as it potentially enables attackers to gain full administrative control over the firewall configuration, which could result in complete network compromise.
The technical implementation of this vulnerability involves the firewall's default network configuration where the management interface is not properly restricted to internal network access only. When a firewall device exposes its administrative interface to WAN interfaces, it creates an attack surface that allows remote exploitation without requiring any additional authentication bypass techniques or complex attack vectors. The unspecified other impacts mentioned in the description suggest that beyond simple administrative access, attackers may be able to manipulate firewall rules, change network configurations, or potentially exploit additional vulnerabilities within the device's web interface. This type of vulnerability is categorized under CWE-284, which addresses improper access control, and specifically relates to improper privilege management in network security devices. The attack vector is straightforward - an attacker simply needs to establish an HTTP connection to the firewall's WAN interface to potentially gain administrative access.
The operational impact of this vulnerability is severe and far-reaching for organizations that deploy affected NETGEAR FVS318N devices without proper configuration changes. Network administrators who fail to modify the default settings leave their entire network infrastructure exposed to remote attacks, as the firewall's primary security function becomes compromised. This vulnerability essentially allows attackers to bypass the firewall's protective capabilities and gain direct access to the network's administrative controls. The implications extend to potential data breaches, network disruption, and complete compromise of the protected network environment. According to ATT&CK framework, this vulnerability maps to T1071.001 for application layer protocol usage and T1068 for exploit for privilege escalation, as attackers can leverage this access to escalate their privileges within the network. Organizations may experience unauthorized network modifications, data exfiltration, or complete network infiltration through this single point of failure.
Mitigation strategies for CVE-2012-2439 require immediate configuration changes to restrict administrative access to the firewall's web interface. Network administrators must disable remote web administration access and configure the firewall to only allow administrative access from trusted internal network segments. The recommended approach involves modifying the firewall's configuration to disable the WAN interface access to the administrative web console, typically through the device's configuration interface or command-line interface. Organizations should also implement network segmentation strategies, ensuring that administrative interfaces are not exposed to external networks at all. Regular security audits and configuration reviews are essential to prevent similar issues in other network devices. The vulnerability highlights the importance of secure default configurations and the need for organizations to perform comprehensive security assessments of their network infrastructure. Additionally, implementing network monitoring and intrusion detection systems can help identify unauthorized access attempts to administrative interfaces, providing early warning of potential exploitation attempts.