CVE-2025-1615 in AN5506-01A ONU GPON
Summary
by MITRE • 02/24/2025
A vulnerability classified as problematic was found in FiberHome AN5506-01A ONU GPON RP2511. Affected by this vulnerability is an unknown functionality of the component NAT Submenu. The manipulation of the argument Description leads to cross site scripting. The attack can be launched remotely. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 02/24/2025
This vulnerability resides within the FiberHome AN5506-01A ONU GPON RP2511 device, specifically affecting the NAT Submenu component where improper input validation allows for cross-site scripting attacks. The flaw manifests when an attacker manipulates the Description argument, which then gets improperly processed and rendered within the web interface without adequate sanitization measures. This represents a classic client-side vulnerability that enables malicious actors to inject arbitrary JavaScript code into the targeted system's web interface. The vulnerability's classification as problematic indicates the severity level that could potentially allow for unauthorized access, data exfiltration, or further exploitation of the affected device. The NAT Submenu functionality serves as a critical interface point for network configuration management, making it a prime target for attackers seeking to compromise the device's operational integrity. The remote attack vector eliminates the need for physical access or network proximity, allowing adversaries to exploit the vulnerability from anywhere on the internet.
The technical implementation of this cross-site scripting vulnerability stems from insufficient validation and sanitization of user-supplied input within the Description parameter of the NAT Submenu. When legitimate users interact with the web interface to configure NAT rules, the system fails to properly escape or filter special characters that could be interpreted as HTML or JavaScript code. This allows an attacker to craft malicious input that, when processed by the web application, executes unintended code within the context of other users' browser sessions. The vulnerability follows the CWE-79 pattern for cross-site scripting, specifically manifesting as a client-side injection flaw where attacker-controlled data flows directly into the application's output without proper encoding. The attack surface is particularly concerning given that the affected device operates within network infrastructure, potentially allowing attackers to escalate privileges or gain unauthorized access to sensitive network configurations.
The operational impact of this vulnerability extends beyond simple script execution, as it could enable attackers to manipulate network traffic routing, modify firewall rules, or even redirect users to malicious websites. The compromised NAT functionality could allow attackers to bypass network security controls, potentially leading to complete network compromise or unauthorized access to internal systems. Since the device operates at the edge of network infrastructure, successful exploitation could provide attackers with a persistent foothold for further reconnaissance and lateral movement within the network. The lack of vendor response to early disclosure attempts creates a particularly dangerous scenario where organizations may remain unaware of the vulnerability for extended periods, leaving their network infrastructure exposed to potential exploitation. This vulnerability directly aligns with ATT&CK technique T1059.007 for scripting and T1566.001 for spearphishing with attachments, as attackers could leverage this flaw to deliver malicious payloads through compromised web interfaces.
Organizations should implement immediate mitigations including network segmentation to isolate affected devices, deployment of web application firewalls to filter malicious requests, and comprehensive network monitoring to detect suspicious traffic patterns. Regular firmware updates should be prioritized once vendor patches become available, though the lack of vendor response suggests organizations may need to consider alternative solutions or vendor replacements. Input validation should be strengthened across all web interfaces to prevent similar vulnerabilities from emerging in other components. The vulnerability highlights the importance of secure coding practices and proper input sanitization, particularly for network infrastructure devices that are frequently targeted by cyber adversaries. Additionally, organizations should consider implementing network access controls and privilege separation to minimize the potential impact of successful exploitation, as the NAT functionality typically requires elevated privileges to modify network routing rules and firewall configurations.