CVE-2024-3007: Tenda FH1205 Buffer Overflow Vulnerability

CVE-2024-3007 Overview

CVE-2024-3007 is a stack-based buffer overflow vulnerability in the Tenda FH1205 wireless router running firmware version 2.0.0.7(775). The flaw resides in the fromNatStaticSetting function handling requests to the /goform/NatStaticSetting endpoint. Attackers can manipulate the page argument to overflow a stack buffer and corrupt adjacent memory. The vulnerability is remotely exploitable and requires only low-privileged authentication. Public exploit details have been disclosed through VulDB entry VDB-258293. The vendor was contacted before disclosure but did not respond, leaving affected devices without an official patch.

Critical Impact
Remote attackers with low privileges can trigger a stack-based buffer overflow to achieve arbitrary code execution or denial of service on affected Tenda FH1205 routers.

Affected Products

Tenda FH1205 router hardware
Tenda FH1205 firmware version 2.0.0.7(775)
Devices exposing the /goform/NatStaticSetting web management endpoint

Discovery Timeline

2024-03-27 - CVE-2024-3007 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-3007

Vulnerability Analysis

The vulnerability affects the fromNatStaticSetting function within the web management interface of the Tenda FH1205 router. This function processes NAT static routing configuration requests sent to the /goform/NatStaticSetting handler. When the function parses the page parameter from the incoming HTTP request, it copies the attacker-controlled value into a fixed-size stack buffer without validating the input length. This results in a classic stack-based buffer overflow, cataloged under [CWE-121] and [CWE-787].

Successful exploitation allows an attacker to overwrite the saved return address on the stack. On MIPS-based Tenda devices, this typically leads to control of the program counter and remote code execution as the web daemon process, which runs with elevated privileges on the device.

Root Cause

The root cause is the absence of bounds checking on the page argument before it is written into a stack-allocated buffer. The vulnerable code path likely uses an unsafe string copy operation such as strcpy or sprintf on user-supplied data. Because the router firmware lacks stack canaries and address space layout randomization on many embedded builds, the overflow directly translates into exploitable memory corruption.

Attack Vector

An attacker sends a crafted HTTP POST request to /goform/NatStaticSetting with an oversized page parameter value. The request must originate from a client that can reach the router web interface, either from the LAN or from the WAN when remote management is enabled. Because the exploit details are public through VulDB, weaponization by opportunistic actors targeting exposed SOHO routers is realistic.

The vulnerability manifests when the router's web daemon copies the page parameter into a fixed-length stack buffer without length validation. Refer to the GitHub IoT Vulnerability Report and VulDB #258293 for technical proof-of-concept details.

Detection Methods for CVE-2024-3007

Indicators of Compromise

HTTP POST requests to /goform/NatStaticSetting containing abnormally long page parameter values
Web daemon crashes or unexpected reboots on Tenda FH1205 devices
Unusual outbound connections initiated from the router management IP after configuration changes
Modifications to NAT static routing tables that were not initiated by administrators

Detection Strategies

Deploy network intrusion detection signatures that flag HTTP requests to /goform/NatStaticSetting exceeding expected parameter lengths
Monitor router syslog output for repeated web service restarts or segmentation faults
Baseline normal administrative traffic patterns to the router and alert on deviations

Monitoring Recommendations

Restrict web management access to trusted management VLANs and log all authentication attempts
Forward router logs to a centralized logging platform for correlation with other network events
Track connections from SOHO routers to unexpected external endpoints that may indicate post-exploitation activity

How to Mitigate CVE-2024-3007

Immediate Actions Required

Disable remote WAN-side management on the Tenda FH1205 to reduce the internet-exposed attack surface
Restrict LAN-side access to /goform/NatStaticSetting through segmentation and firewall rules
Rotate router administrative credentials and require strong, unique passwords for the low-privileged accounts required to reach the vulnerable endpoint
Plan replacement of the Tenda FH1205 with a supported device given the vendor's lack of response to the disclosure

Patch Information

No official patch is available. According to the CVE record, the vendor was contacted early about this disclosure but did not respond. Organizations should monitor the Tenda support portal for future firmware updates and consider the device end-of-support until the vendor issues a fix.

Workarounds

Place the router behind an upstream firewall that filters unsolicited management traffic
Block external access to TCP ports serving the router web interface at the perimeter
Enforce network segmentation so that only designated administrator workstations can reach the router management interface
Replace the device with a vendor-supported alternative if compensating controls are not feasible

bash

# Example iptables rule to restrict access to the router management interface
# Replace 192.0.2.10 with the authorized administrator workstation address
iptables -A FORWARD -p tcp -d <router_ip> --dport 80 -s 192.0.2.10 -j ACCEPT
iptables -A FORWARD -p tcp -d <router_ip> --dport 80 -j DROP