CVE-2024-9532 Overview
CVE-2024-9532 is a buffer overflow vulnerability affecting D-Link DIR-605L firmware version 2.13B01 BETA. The flaw resides in the formAdvanceSetup function within the /goform/formAdvanceSetup endpoint. Manipulation of the webpage argument triggers a stack-based buffer overflow condition. Attackers can exploit this issue remotely over the network with low privileges required. Public disclosure of the exploit details increases the risk of active targeting against exposed devices.
Critical Impact
Remote attackers can trigger a buffer overflow in the router's web management interface, potentially leading to arbitrary code execution or device compromise on affected D-Link DIR-605L routers.
Affected Products
- D-Link DIR-605L Router (Hardware)
- D-Link DIR-605L Firmware version 2.13B01 BETA
- Web management interface endpoint /goform/formAdvanceSetup
Discovery Timeline
- 2024-10-05 - CVE-2024-9532 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-9532
Vulnerability Analysis
The vulnerability exists in the formAdvanceSetup handler exposed through the router's web administration interface at /goform/formAdvanceSetup. The handler processes the webpage parameter without validating its length before copying it into a fixed-size buffer. This classic buffer overflow condition is categorized as [CWE-120] Buffer Copy without Checking Size of Input.
Successful exploitation can corrupt adjacent memory on the stack, enabling attackers to overwrite control flow structures. Depending on device architecture and memory protections, the flaw may result in denial of service or arbitrary code execution in the context of the router's HTTP daemon. The D-Link DIR-605L is a legacy consumer router, and the affected 2.13B01 BETA firmware has reached end-of-life status.
Root Cause
The root cause is missing bounds checking on the webpage HTTP request argument before it is copied into a stack-allocated buffer within formAdvanceSetup. The absence of length validation or safe string handling functions allows attacker-supplied data to exceed the destination buffer size.
Attack Vector
The attack vector is network-based against the router's HTTP administrative interface. An attacker with authenticated access to the web management console can send a crafted POST request to /goform/formAdvanceSetup containing an oversized webpage parameter. When the router's web interface is exposed to the internet or accessible from an untrusted network segment, the attack surface expands significantly. The vulnerability description in the referenced GitHub IoT Vulnerability Document provides additional technical details on the parameter handling.
Detection Methods for CVE-2024-9532
Indicators of Compromise
- HTTP POST requests to /goform/formAdvanceSetup with abnormally long values in the webpage parameter
- Unexpected reboots or crashes of the D-Link DIR-605L router's HTTP daemon
- Unauthorized configuration changes to router settings or DNS entries
- Outbound connections from the router to unknown external hosts
Detection Strategies
- Inspect HTTP traffic destined for router management interfaces for oversized parameter values targeting /goform/ endpoints
- Monitor network flows for anomalous connections originating from router IP addresses
- Deploy intrusion detection signatures targeting known D-Link goform exploitation patterns
Monitoring Recommendations
- Log all administrative access attempts to router web interfaces and forward to a centralized logging platform
- Alert on router configuration changes outside of maintenance windows
- Track firmware version inventory across managed network devices to identify vulnerable units
How to Mitigate CVE-2024-9532
Immediate Actions Required
- Disable remote web administration on the D-Link DIR-605L to eliminate internet-facing exposure of the vulnerable endpoint
- Restrict access to the router's web interface to trusted management VLANs or specific administrator IP addresses
- Replace the DIR-605L with a currently supported router model, as this device is a legacy product
- Rotate administrative credentials on the router to reduce risk from credential-based access
Patch Information
No vendor patch is currently referenced in the CVE data for the DIR-605L firmware 2.13B01 BETA. The D-Link DIR-605L is a legacy device and may not receive further security updates. Consult the D-Link Official Website for end-of-life advisories and replacement guidance.
Workarounds
- Segment the router onto an isolated management network with no direct internet exposure
- Place the affected device behind a firewall that blocks external access to TCP ports 80 and 443 on the router
- Decommission the device and migrate to a supported router with active security maintenance
# Example firewall rule to block external access to router management interface
# Adjust interface names and router IP to match your environment
iptables -A FORWARD -d 192.168.0.1 -p tcp --dport 80 -i wan0 -j DROP
iptables -A FORWARD -d 192.168.0.1 -p tcp --dport 443 -i wan0 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
