CVE-2001-1439 in HP-UX
Summary
by MITRE
Buffer overflow in the text editor functionality in HP-UX 10.01 through 11.04 on HP9000 Series 700 and Series 800 allows local users to cause a denial of service ("system availability") via text editors such as (1) e, (2) ex, (3) vi, (4) edit, (5) view, and (6) vedit.
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Analysis
by VulDB Data Team • 11/17/2024
The vulnerability identified as CVE-2001-1439 represents a critical buffer overflow condition affecting multiple text editor utilities within HP-UX operating systems versions 10.01 through 11.04. This security flaw specifically targets the text editor functionality on HP9000 Series 700 and Series 800 hardware platforms, creating a significant risk for system availability and stability. The affected editors include e, ex, vi, edit, view, and vedit, which are fundamental components of the Unix-like operating system environment. The buffer overflow vulnerability arises from insufficient input validation and improper memory management within these text editing utilities, allowing maliciously crafted input to overwrite adjacent memory locations beyond the allocated buffer boundaries.
This technical flaw operates at the core of software memory management principles, where the text editors fail to properly validate the length of input data before copying it into fixed-size memory buffers. The vulnerability manifests when local users exploit this condition through the text editing interfaces, potentially causing the system to crash or become unresponsive. The impact extends beyond simple application-level failures as the buffer overflow can lead to complete system instability, effectively rendering the affected HP-UX systems unavailable to legitimate users. The vulnerability's classification aligns with CWE-121, which describes heap-based buffer overflow conditions, and represents a classic example of insufficient bounds checking in software development practices. The attack surface is particularly concerning given that these editors are standard system utilities frequently accessed by users and system processes.
The operational impact of this vulnerability presents a substantial threat to system availability and service continuity within HP-UX environments. Local users possessing basic system access can exploit this weakness to trigger denial of service conditions, effectively preventing legitimate users from accessing critical text editing functionality. The cascading effects of such an attack can extend beyond individual applications to impact overall system stability and user productivity. From an operational security perspective, this vulnerability demonstrates the critical importance of maintaining proper input validation and memory management practices in system utilities. The vulnerability's persistence across multiple HP-UX versions indicates a fundamental flaw in the underlying codebase that required systematic remediation rather than isolated patching. Organizations running affected systems face potential operational disruptions and increased security risks when local accounts are compromised or when malicious users leverage this weakness to gain unauthorized system control.
Mitigation strategies for this vulnerability should focus on immediate system patching and updates provided by HP to address the buffer overflow conditions in the affected text editors. System administrators must implement comprehensive security monitoring to detect potential exploitation attempts and establish proper access controls to limit local user privileges where possible. The implementation of input validation measures and memory protection mechanisms can help reduce the risk of successful exploitation. Additionally, organizations should consider deploying intrusion detection systems to monitor for anomalous behavior patterns that might indicate exploitation attempts. The vulnerability highlights the necessity of maintaining up-to-date system security patches and implementing proper software development practices that include rigorous code review processes and automated testing for memory safety. From a compliance standpoint, this vulnerability would likely trigger requirements under security frameworks such as iso 27001 and nist 800-53, emphasizing the importance of vulnerability management and incident response procedures. The remediation process should also include comprehensive system auditing to ensure that all affected text editing utilities have been properly patched and that no residual vulnerabilities remain within the system configuration.