CVE-2025-6164 in A3002R
Summary
by MITRE • 06/17/2025
A vulnerability was found in TOTOLINK A3002R 4.0.0-B20230531.1404. It has been classified as critical. This affects an unknown part of the file /boafrm/formMultiAP of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 06/23/2025
This critical vulnerability resides within the TOTOLINK A3002R router firmware version 4.0.0-B20230531.1404, specifically within the HTTP POST Request Handler component. The flaw manifests in the /boafrm/formMultiAP file where an insufficient input validation mechanism fails to properly handle the submit-url parameter. This buffer overflow vulnerability represents a significant security risk as it allows attackers to manipulate the application's memory structure through crafted HTTP POST requests. The vulnerability's classification as critical indicates the potential for severe consequences including complete system compromise and unauthorized access to network resources.
The technical exploitation occurs when an attacker submits a maliciously crafted HTTP POST request containing an oversized submit-url parameter that exceeds the allocated buffer space. This buffer overflow condition creates an opportunity for arbitrary code execution within the router's memory space, potentially allowing attackers to gain root-level privileges. The vulnerability's remote exploitability means that attackers do not require physical access to the device or local network presence to initiate the attack, making it particularly dangerous for internet-facing network equipment. The specific component affected is the HTTP POST Request Handler which processes user inputs through web forms, creating a direct pathway for malicious input to reach the vulnerable buffer.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete network compromise. An attacker who successfully exploits this buffer overflow could potentially gain full control over the router's functionality, including the ability to modify network configurations, redirect traffic, install malicious firmware, or establish persistent backdoors. The router's role as a gateway device makes this vulnerability particularly dangerous as it could provide attackers with a foothold into larger network infrastructures. Network administrators may face the challenge of identifying compromised devices and the potential for lateral movement throughout the network. The public disclosure of the exploit increases the likelihood of widespread exploitation and makes this vulnerability a high-priority target for malicious actors.
Mitigation strategies should prioritize immediate firmware updates from TOTOLINK as the primary defense mechanism against this vulnerability. Network administrators should implement network segmentation and access controls to limit the potential impact of a successful exploitation attempt. Additional protective measures include monitoring network traffic for suspicious POST requests containing unusually long parameter values and implementing intrusion detection systems that can identify potential buffer overflow attack patterns. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a clear violation of secure coding practices. From an ATT&CK framework perspective, this vulnerability maps to techniques involving command and control communications and privilege escalation, potentially enabling adversaries to establish persistent access and move laterally within compromised networks. Organizations should also consider implementing network access controls to restrict direct internet access to network devices and ensure that all router firmware remains current with security patches from vendors.