CVE-1999-0437 in WebRamp Router
Summary
by MITRE
Remote attackers can perform a denial of service in WebRamp systems by sending a malicious string to the HTTP port.
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Analysis
by VulDB Data Team • 04/18/2026
The vulnerability described in CVE-1999-0437 represents a classic denial of service flaw affecting WebRamp systems that operate over HTTP protocols. This weakness allows remote attackers to disrupt service availability by transmitting specifically crafted strings to the target system's HTTP port, effectively compromising the system's operational integrity and availability. The vulnerability exploits fundamental aspects of how WebRamp systems process incoming HTTP requests, particularly when handling malformed or specially constructed input data that triggers unexpected behavior within the application's request parsing mechanisms.
The technical nature of this vulnerability stems from insufficient input validation and error handling within the WebRamp HTTP processing components. When malicious strings are sent to the HTTP port, the system fails to properly sanitize or reject these inputs, leading to system instability or complete service termination. This flaw operates at the application layer of the network stack, specifically targeting the HTTP protocol implementation within the WebRamp environment. The vulnerability is categorized under CWE-20, which addresses "Improper Input Validation" and represents a fundamental security weakness where the system does not adequately validate or sanitize inputs received from external sources. The attack vector is particularly dangerous because it requires no authentication or privileged access, making it accessible to any remote attacker who can reach the target system's HTTP port.
From an operational impact perspective, this vulnerability creates significant business disruption risks for organizations relying on WebRamp systems. The denial of service condition can result in complete unavailability of web services, leading to financial losses, customer dissatisfaction, and potential regulatory compliance issues. The attack can be executed with minimal resources and technical expertise, making it an attractive target for malicious actors seeking to disrupt operations. Organizations may experience extended downtime while implementing patches or workarounds, and the vulnerability could be exploited as part of larger attack campaigns targeting multiple systems within an organization's infrastructure. The impact extends beyond immediate service disruption to include potential damage to reputation and loss of customer trust.
Mitigation strategies for CVE-1999-0437 should focus on implementing comprehensive input validation mechanisms and strengthening the HTTP processing components of WebRamp systems. Organizations should deploy network-level filtering solutions that can detect and block malicious traffic patterns before they reach the target systems. The implementation of proper error handling and input sanitization routines within the application layer provides an additional defense mechanism. Security patches and updates should be applied immediately when available, though the age of this vulnerability suggests that organizations may need to consider migrating to more modern web server solutions. Network segmentation and access control measures can limit the attack surface by restricting direct access to HTTP ports from untrusted networks. Additionally, implementing intrusion detection systems that monitor for unusual traffic patterns on HTTP ports can provide early warning of potential exploitation attempts. The vulnerability serves as a reminder of the critical importance of proper input validation and the potential consequences of inadequate security measures in web server implementations.