CVE-2000-0641 in Savant Webserver
Summary
by MITRE
Savant web server allows remote attackers to execute arbitrary commands via a long GET request.
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Analysis
by VulDB Data Team • 10/13/2025
The CVE-2000-0641 vulnerability represents a critical command injection flaw in the Savant web server implementation that enables remote attackers to execute arbitrary code on affected systems. This vulnerability stems from insufficient input validation within the web server's request handling mechanism, specifically when processing GET requests that exceed predetermined length thresholds. The flaw exists in the server's inability to properly sanitize or limit the length of incoming HTTP GET parameters, creating a pathway for malicious actors to inject and execute harmful commands directly on the target system.
The technical exploitation of this vulnerability occurs when an attacker crafts a GET request containing an excessively long parameter string that triggers a buffer overflow condition within the Savant web server's processing routines. This buffer overflow allows the attacker to overwrite memory segments and redirect execution flow to malicious code injected within the request payload. The vulnerability aligns with CWE-121, which categorizes buffer overflow conditions as critical security weaknesses that can lead to arbitrary code execution. The attack vector operates through the standard HTTP protocol without requiring authentication, making it particularly dangerous as it can be exploited by anyone with access to the web server's network interface.
The operational impact of CVE-2000-0641 extends far beyond simple unauthorized access, as successful exploitation can result in complete system compromise including data theft, system modification, and potential lateral movement within network environments. Attackers can leverage this vulnerability to establish persistent backdoors, install malware, or use the compromised server as a launch point for attacking other systems within the same network. The vulnerability also maps to ATT&CK technique T1059.007, which covers command and scripting interpreter usage through web shells, demonstrating how this flaw can enable more sophisticated attack patterns. Organizations running Savant web servers are particularly vulnerable because the flaw affects the core web server functionality, making it difficult to isolate and remediate without complete system replacement or patching.
Mitigation strategies for CVE-2000-0641 primarily focus on implementing proper input validation and request length restrictions within the web server configuration. System administrators should configure the Savant server to reject GET requests exceeding predetermined length limits, typically through custom configuration directives or by implementing web application firewalls that can detect and block suspicious request patterns. The vulnerability also requires immediate patching or upgrade to newer versions of the Savant web server that have addressed the buffer overflow condition through proper memory management and input sanitization. Network segmentation and access control measures should be implemented to limit exposure of web servers to untrusted networks, while regular security audits and penetration testing can help identify similar vulnerabilities in other web server implementations. Additionally, monitoring for unusual GET request patterns and implementing intrusion detection systems can provide early warning of potential exploitation attempts.