CVE-2002-0968 in SimpleServer:WWW
Summary
by MITRE
Buffer overflow in AnalogX SimpleServer:WWW 1.16 and earlier allows remote attackers to cause a denial of service (crash) and execute code via a long HTTP request method name.
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Analysis
by VulDB Data Team • 09/10/2025
The vulnerability identified as CVE-2002-0968 represents a critical buffer overflow flaw within AnalogX SimpleServer:WWW version 1.16 and earlier implementations. This server software, designed for basic web serving capabilities, contains a fundamental programming error that manifests when processing HTTP request method names exceeding predetermined buffer limits. The flaw exists in the server's request parsing logic where it fails to properly validate the length of incoming HTTP method identifiers before copying them into fixed-size memory buffers. This particular vulnerability falls under the CWE-121 category of Stack-based Buffer Overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The AnalogX SimpleServer:WWW application operates as a lightweight web server solution often deployed in environments where resource constraints limit the availability of more robust server implementations, making it a target for exploitation in scenarios where simpler alternatives are preferred.
The technical exploitation of this vulnerability occurs when remote attackers craft specially malformed HTTP requests containing excessively long method names that exceed the allocated buffer space. When the vulnerable server processes such requests, the buffer overflow condition triggers memory corruption that typically results in application crashes and subsequent denial of service conditions. However, the more severe implications arise when attackers carefully construct their malformed requests to overwrite critical memory addresses, potentially enabling arbitrary code execution within the context of the server process. The overflow can overwrite return addresses, function pointers, or other critical control data structures, allowing attackers to redirect program execution flow. This vulnerability specifically impacts the HTTP request parsing component of the server, where the method name field is processed without adequate length validation, creating an attack surface that can be leveraged for both service disruption and privilege escalation attacks.
The operational impact of CVE-2002-0968 extends beyond simple denial of service scenarios to encompass potential system compromise and unauthorized access capabilities. Organizations utilizing vulnerable versions of AnalogX SimpleServer:WWW face significant risks including complete system takeover, data exfiltration, and persistent backdoor establishment. The vulnerability affects systems where the server is accessible from external networks, making it particularly dangerous in internet-facing environments. Attackers can exploit this weakness to gain elevated privileges, install malware, or establish persistent access points within network infrastructure. The vulnerability's exploitation aligns with ATT&CK technique T1203 for Exploitation for Client Execution and T1499 for Endpoint Termination, as it enables both immediate service disruption and long-term system compromise. Given the age of this vulnerability and the widespread deployment of the affected software, organizations may face challenges in identifying all vulnerable instances within their network infrastructure.
Mitigation strategies for CVE-2002-0968 must address both immediate remediation and long-term security posture improvements. The primary recommendation involves upgrading to patched versions of AnalogX SimpleServer:WWW or migrating to more modern, supported web server solutions that have proper input validation and memory management practices. Organizations should implement network segmentation and access controls to limit exposure of vulnerable servers to untrusted networks. Network monitoring should be enhanced to detect anomalous HTTP request patterns that may indicate exploitation attempts. Additionally, implementing intrusion detection systems with signature matching capabilities for this specific vulnerability can provide early warning of attacks. The vulnerability demonstrates the importance of input validation and bounds checking in server-side applications, principles that align with secure coding standards such as those recommended in the OWASP Secure Coding Practices. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other server applications within the organization's infrastructure.