CVE-2002-1531 in Superscout Email Filter
Summary
by MITRE
The administrative web interface (STEMWADM) for SurfControl SuperScout Email Filter allows remote attackers to cause a denial of service (crash) via an HTTP request without a Content-Length parameter.
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Analysis
by VulDB Data Team • 07/02/2024
The vulnerability identified as CVE-2002-1531 represents a critical flaw in the SurfControl SuperScout Email Filter's administrative web interface known as STEMWADM. This issue stems from the application's failure to properly handle HTTP requests that lack the mandatory Content-Length header parameter. The administrative interface serves as a critical management component for configuring and monitoring email filtering policies, making it a prime target for attackers seeking to disrupt organizational email services. The vulnerability exists within the HTTP request processing logic where the system does not adequately validate the presence of essential headers required for proper request handling. This flaw demonstrates poor input validation practices that are commonly associated with buffer overflow vulnerabilities and denial of service conditions in web applications. The absence of proper header validation creates an exploitable condition where malformed HTTP requests can trigger unexpected behavior in the application's processing engine.
The technical exploitation of this vulnerability occurs when remote attackers craft HTTP requests specifically designed to omit the Content-Length parameter that is essential for determining the size of request bodies. When the STEMWADM interface processes such requests, the application fails to handle the missing parameter gracefully, leading to a crash of the administrative service. This crash effectively renders the email filtering management interface unavailable, preventing authorized administrators from performing necessary configuration changes or monitoring activities. The vulnerability's impact extends beyond simple service disruption as it can be leveraged to create persistent denial of service conditions that may require manual intervention to restore normal operations. The flaw operates at the application layer of the network stack and can be exploited using standard network tools to send malformed HTTP requests to the affected system. This type of vulnerability is categorized under CWE-400 as "Uncontrolled Resource Consumption" and aligns with ATT&CK technique T1499.004 for "Endpoint Denial of Service" through resource exhaustion or application crashes.
The operational impact of CVE-2002-1531 is significant for organizations relying on SurfControl SuperScout Email Filter for their email security infrastructure. When exploited, this vulnerability can result in complete loss of administrative access to the email filtering system, leaving organizations unable to monitor or modify their email security policies during critical incidents. The denial of service condition affects not only the administrative interface but can potentially impact the underlying email filtering capabilities if the crash affects the entire application process. Organizations may experience extended downtime while system administrators work to restore services, potentially allowing malicious email traffic to bypass security controls during the recovery period. The vulnerability's remote exploitability means that attackers do not need physical access or local network privileges to cause disruption, making it particularly dangerous in environments where network security is paramount. Security teams must consider this vulnerability when assessing their email security infrastructure and implementing defensive measures to protect against similar flaws in other email filtering solutions. The incident highlights the importance of proper HTTP request validation and the need for robust error handling in web-based administrative interfaces to prevent exploitation of such fundamental protocol violations.