CVE-2000-0017 in Linux
Summary
by MITRE
Buffer overflow in Linux linuxconf package allows remote attackers to gain root privileges via a long parameter.
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Analysis
by VulDB Data Team • 10/20/2025
The vulnerability identified as CVE-2000-0017 represents a critical buffer overflow flaw within the linuxconf package distributed with early versions of the Linux operating system. This security weakness resides in the configuration tool's handling of command-line parameters, specifically when processing user input through the web interface. The flaw occurs when the application fails to properly validate the length of incoming parameters, allowing an attacker to exceed the allocated buffer space and overwrite adjacent memory locations. This particular vulnerability falls under the Common Weakness Enumeration category CWE-121, which addresses stack-based buffer overflow conditions where insufficient bounds checking permits arbitrary code execution. The linuxconf package was widely used in enterprise environments for system administration tasks, making this vulnerability particularly dangerous as it could be exploited remotely without requiring prior authentication credentials.
The technical implementation of this buffer overflow exploit leverages the predictable memory layout of the linuxconf application to overwrite the return address on the stack, effectively redirecting program execution flow to malicious code injected by the attacker. When a remote user submits a specially crafted parameter exceeding the buffer capacity, the overflow corrupts the stack frame and allows the attacker to inject shellcode that executes with the privileges of the running process. Since linuxconf typically runs with elevated privileges to perform system configuration tasks, successful exploitation results in complete system compromise with root-level access. The vulnerability is classified as a remote code execution flaw under the MITRE ATT&CK framework's technique T1059, specifically targeting the execution of malicious code through system services and administrative interfaces. The attack vector requires no authentication and can be executed entirely through web-based interfaces, making it particularly attractive to threat actors seeking unauthorized access to Linux systems.
The operational impact of CVE-2000-0017 extends beyond immediate privilege escalation to encompass complete system takeover capabilities that can result in data exfiltration, persistent backdoor installation, and further network reconnaissance activities. Organizations running vulnerable versions of linuxconf were exposed to immediate compromise, with attackers able to establish persistent access points and deploy additional malware payloads. The vulnerability's widespread presence in enterprise Linux deployments meant that a single compromised system could serve as a foothold for lateral movement throughout networks. Security professionals had to implement immediate patching strategies and network segmentation measures to contain potential exploitation attempts. The flaw demonstrates the critical importance of input validation in system administration tools and highlights how seemingly benign configuration utilities can represent significant attack surfaces. Organizations were forced to conduct comprehensive vulnerability assessments of their Linux infrastructure and implement more rigorous security controls for administrative interfaces. The incident underscored the need for proper software security testing and code review processes, particularly for applications handling user input in privileged contexts. Remediation required not only patching the specific vulnerability but also implementing network monitoring to detect exploitation attempts and establishing more robust access controls for system administration functions. This vulnerability exemplifies how buffer overflow issues in widely deployed system tools can create cascading security failures across entire organizations.