CVE-2006-3907 in Speedstream Wireless Router
Summary
by MITRE
Siemens SpeedStream 2624 allows remote attackers to cause a denial of service (device hang) by sending a crafted packet to the web administrative interface.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 09/17/2017
The Siemens SpeedStream 2624 is a network device that serves as a broadband router and modem, widely deployed in enterprise and residential networking environments. This device exposes a web administrative interface that allows authorized users to configure network parameters, manage connected devices, and monitor network performance. The vulnerability exists within the device's web interface handling mechanism, specifically when processing incoming network packets that are directed to the administrative web server component. The flaw represents a classic input validation issue where the device fails to properly sanitize or validate incoming HTTP requests before processing them through its internal web server stack.
The technical implementation of this vulnerability stems from improper handling of malformed or specially crafted packets sent to the web administrative interface. When an attacker sends a maliciously constructed packet to the device's web server, the system does not adequately validate the packet structure or content, leading to a condition where the web server process becomes unresponsive or enters an infinite loop. This condition causes the device to hang or freeze, effectively rendering the network device non-functional and preventing legitimate administrative access. The device continues to operate normally for network traffic but becomes completely inaccessible for configuration or monitoring purposes through its web interface.
The operational impact of this vulnerability extends beyond simple service disruption, as it can compromise network availability and business continuity. Organizations relying on the SpeedStream 2624 for network infrastructure may experience complete loss of administrative control over their network devices, forcing network administrators to physically access the device to restore functionality through manual reboot procedures. This vulnerability can be exploited remotely without requiring authentication credentials, making it particularly dangerous as attackers can initiate the denial of service condition from any location with network access to the device. The attack vector is straightforward and can be automated, allowing for repeated exploitation attempts that could maintain persistent service disruption.
Security professionals should consider this vulnerability in the context of the CWE-121 stack-based buffer overflow weakness, as the improper input validation can lead to memory corruption conditions that cause system instability. The ATT&CK framework categorizes this as a Denial of Service attack technique, specifically under the T1499.004 sub-technique for Network Denial of Service. Mitigation strategies include implementing network segmentation to isolate administrative interfaces from external access, deploying intrusion detection systems to monitor for suspicious packet patterns, and applying firmware updates from Siemens when available. Organizations should also consider restricting access to the web administrative interface through firewall rules and implementing network access control measures to limit exposure to unauthorized users who could exploit this vulnerability for malicious purposes.