CVE-2002-0128 in Server
Summary
by MITRE
cgitest.exe in Sambar Server 5.1 before Beta 4 allows remote attackers to cause a denial of service, and possibly execute arbitrary code, via a long argument.
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Analysis
by VulDB Data Team • 09/22/2025
The vulnerability identified as CVE-2002-0128 affects the cgitest.exe component within Sambar Server 5.1 prior to Beta 4, representing a critical security flaw that exposes the web server to remote exploitation. This issue manifests through improper input validation mechanisms that fail to adequately handle excessively long argument strings passed to the cgitest.exe utility. The vulnerability resides in the server's handling of command-line arguments, where insufficient bounds checking allows attackers to craft malicious input that can trigger unpredictable behavior in the targeted system.
The technical implementation of this vulnerability stems from a classic buffer overflow condition that occurs when the cgitest.exe process receives argument strings exceeding predetermined memory allocation limits. This flaw operates under CWE-121, which categorizes buffer overflow conditions as a fundamental weakness in software design that can lead to arbitrary code execution or system instability. The vulnerability specifically impacts the server's ability to process CGI requests, where the cgitest.exe utility serves as a testing mechanism for CGI scripts within the Sambar Server environment. When attackers supply arguments exceeding the allocated buffer space, the overflow can overwrite adjacent memory locations, potentially allowing for code execution or system crash conditions.
The operational impact of this vulnerability extends beyond simple denial of service to encompass potential remote code execution capabilities, making it particularly dangerous for web server environments. Attackers can leverage this flaw to disrupt server operations through denial of service attacks, but more concerning is the possibility of executing arbitrary code on the vulnerable system. The implications are significant as the Sambar Server was widely used for hosting web applications, and exploitation could lead to complete system compromise. This vulnerability aligns with ATT&CK technique T1203, which describes the use of malformed input to cause system instability, and T1059, which covers the execution of commands through various interfaces including CGI scripts.
Mitigation strategies for CVE-2002-0128 require immediate implementation of software updates and patches provided by the vendor, as well as network-level defensive measures to restrict access to vulnerable components. Organizations should implement input validation controls at multiple layers, including network firewalls that filter incoming requests to CGI endpoints, and application-level controls that enforce argument length restrictions. The most effective remediation involves upgrading to Sambar Server Beta 4 or later versions where the buffer overflow conditions have been addressed through proper bounds checking mechanisms. Additionally, security administrators should conduct comprehensive vulnerability assessments to identify other potentially affected components within the server environment, as similar buffer overflow conditions may exist in other utilities or modules. Network segmentation and access control measures should be implemented to limit exposure of the vulnerable cgitest.exe component to untrusted networks, while regular monitoring should be established to detect potential exploitation attempts through unusual traffic patterns or system behavior anomalies.