CVE-2000-0130 in UnixWare
Summary
by MITRE
Buffer overflow in SCO scohelp program allows remote attackers to execute commands.
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Analysis
by VulDB Data Team • 04/20/2026
The vulnerability identified as CVE-2000-0130 represents a critical buffer overflow flaw within the scohelp program distributed by SCO Group. This particular software component serves as a help system interface for SCO Unix-based operating systems and is designed to provide users with documentation and assistance. The buffer overflow occurs when the program processes user-supplied input without proper bounds checking, creating an exploitable condition that can be leveraged by remote attackers. The flaw specifically manifests in the program's handling of command-line arguments or input data, where insufficient validation allows an attacker to overwrite adjacent memory locations in the program's execution stack.
The technical nature of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-122, which covers stack-based buffer overflow scenarios. The attack vector operates over network connections where the scohelp program might be accessible, allowing remote exploitation without requiring local system access. When an attacker crafts malicious input that exceeds the allocated buffer space, the overflow can overwrite return addresses and executable code segments, enabling arbitrary code execution with the privileges of the scohelp process. This typically means the attacker can gain elevated system access and potentially achieve full system compromise.
The operational impact of this vulnerability extends beyond simple command execution, as it represents a fundamental security weakness in system administration tools. Organizations running SCO Unix systems with vulnerable scohelp installations face significant risks including unauthorized system access, data breaches, and potential lateral movement within their network infrastructure. The vulnerability's remote exploitability makes it particularly dangerous as it can be targeted from external networks without requiring physical access to the system. Security professionals should consider this vulnerability in the context of ATT&CK technique T1203, which covers exploitation of remote services, and T1068, which involves exploitation of remote services for privilege escalation.
Mitigation strategies for CVE-2000-0130 should prioritize immediate patching of the scohelp program through official SCO updates or vendor-provided security fixes. System administrators should disable or remove the vulnerable program if it is not essential for operations, as the safest approach to prevent exploitation. Network segmentation and firewall rules can help limit access to systems running the affected software, reducing the attack surface. Additionally, implementing input validation controls and regular security assessments can help identify similar vulnerabilities in other system components. Organizations should also consider the broader implications of running legacy Unix systems and evaluate migration strategies to modern operating systems that have better security controls and more frequent patching cycles. The vulnerability demonstrates the importance of proper input validation and memory management practices in system software development, particularly for programs that handle user input in network-accessible environments.