CVE-2006-0784 in DWL-G700AP
Summary
by MITRE
D-Link DWL-G700AP with firmware 2.00 and 2.01 allows remote attackers to cause a denial of service (CAMEO HTTP service crash) via a request composed of "GET" followed by a space and two newlines, possibly triggering the crash due to missing arguments.
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Analysis
by VulDB Data Team • 01/01/2025
The CVE-2006-0784 vulnerability affects D-Link DWL-G700AP wireless access points running firmware versions 2.00 and 2.01, representing a critical denial of service weakness in the device's HTTP service implementation. This vulnerability stems from insufficient input validation within the CAMEO HTTP service component that handles incoming web requests. The flaw manifests when an attacker crafts a specific malformed HTTP GET request consisting of the GET method keyword followed by a single space character and then two newline characters. This particular request structure exploits a buffer handling issue in the web server implementation where the service fails to properly validate or process the request parameters, leading to an unhandled exception that crashes the entire HTTP service. The vulnerability operates at the application layer of the network stack, specifically targeting the web interface that administrators use to configure and manage the wireless access point.
The technical exploitation of this vulnerability demonstrates a classic buffer overflow condition or improper input handling that falls under CWE-129, which addresses issues related to insufficient validation of the length or size of input data. The attack vector is particularly concerning as it requires no authentication and can be executed remotely, making it a significant threat to network availability. The HTTP service crash occurs because the CAMEO web server implementation does not properly validate the arguments passed to its request parsing functions, creating a scenario where malformed input causes the service to terminate unexpectedly. This type of vulnerability aligns with ATT&CK technique T1499.004, which covers network denial of service attacks targeting services and protocols. The specific nature of the exploit indicates that the device's HTTP server lacks proper error handling mechanisms for malformed requests, creating a path for remote attackers to disrupt network operations without requiring any privileged access or specialized tools.
The operational impact of this vulnerability extends beyond simple service disruption, as it can compromise network availability and potentially affect business operations that depend on wireless connectivity. When the HTTP service crashes, administrators lose remote access to the device configuration interface, forcing them to resort to physical access or console-based management methods to restore functionality. This vulnerability affects organizations that rely on D-Link DWL-G700AP devices for wireless network infrastructure, particularly those that do not regularly update firmware or monitor for security advisories. The remote exploitation capability means that attackers can target these devices from anywhere on the internet, making the vulnerability particularly dangerous in environments where wireless access points are exposed to external networks. The lack of authentication requirements for exploitation makes this a high-risk vulnerability that can be exploited by automated scanning tools, potentially leading to widespread service disruption across multiple organizations using affected firmware versions. Organizations should consider implementing network segmentation to isolate these devices and apply firmware updates as soon as they become available to mitigate the risk of exploitation.
The remediation approach for this vulnerability requires immediate firmware updates from D-Link, as the issue stems from the vendor's implementation of the HTTP service rather than configuration issues. Network administrators should also implement monitoring solutions to detect unusual HTTP traffic patterns that might indicate exploitation attempts. The vulnerability highlights the importance of proper input validation in web server implementations and demonstrates how seemingly minor implementation flaws can lead to significant service disruption. Organizations should establish robust patch management processes to ensure that firmware updates are deployed promptly, particularly for critical network infrastructure devices. The incident also underscores the need for network segmentation and access control measures to limit the potential impact of such vulnerabilities, as well as the importance of maintaining current security intelligence to identify and respond to similar threats in other network components.