CVE-2000-1185 in RideWayPN
Summary
by MITRE
The telnet proxy in RideWay PN proxy server allows remote attackers to cause a denial of service via a flood of connections that contain malformed requests.
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Analysis
by VulDB Data Team • 10/11/2025
The vulnerability described in CVE-2000-1185 affects the telnet proxy functionality within the RideWay PN proxy server software, representing a significant security weakness that can be exploited to disrupt service availability. This issue specifically targets the proxy server's handling of telnet connections, where the system fails to properly validate incoming connection requests. The vulnerability stems from inadequate input validation mechanisms that allow malformed requests to be processed without proper sanitization, creating a pathway for malicious actors to exploit the system's connection handling capabilities.
The technical flaw manifests when remote attackers flood the proxy server with a high volume of malformed telnet requests that exploit weaknesses in the connection processing logic. These malformed requests are designed to overwhelm the server's ability to handle legitimate connections while consuming system resources through inefficient processing of invalid inputs. The vulnerability operates at the network protocol level where the proxy server fails to implement proper connection rate limiting or request validation controls, allowing an attacker to exhaust available resources through connection exhaustion attacks. This type of attack falls under the category of resource exhaustion vulnerabilities and is classified as a denial of service condition that can render the proxy server completely unavailable to legitimate users.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire proxy infrastructure. When exploited successfully, attackers can cause sustained denial of service conditions that may require system restarts to resolve, leading to extended downtime for organizations relying on the RideWay PN proxy server for network connectivity. The vulnerability particularly affects environments where the proxy server serves as a critical gateway for telnet-based administrative access or legacy system connectivity, making it a prime target for attackers seeking to disrupt business operations. Organizations using this proxy server may experience cascading effects where the denial of service impacts downstream applications and services that depend on the proxy for network access.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and connection management controls within the proxy server configuration. Network administrators should deploy connection rate limiting mechanisms to prevent excessive connection attempts from single sources, while also implementing proper request validation to filter out malformed inputs before they can be processed by the telnet proxy component. The implementation of intrusion detection systems can help monitor for unusual connection patterns that may indicate exploitation attempts, while regular security updates and patches should be applied to address known vulnerabilities in the proxy server software. Organizations should also consider implementing network segmentation strategies to limit the impact of potential exploitation and ensure that critical systems remain accessible even if the proxy server is compromised. This vulnerability aligns with CWE-400 which addresses unchecked resource consumption, and represents a classic example of how inadequate input validation can lead to system availability issues that affect operational continuity. The attack pattern described in this vulnerability corresponds to techniques found in the ATT&CK framework under the denial of service category, specifically targeting network service availability through resource exhaustion methods that are commonly used in cyber attacks against network infrastructure components.