CVE-2003-1429 in Naoko
Summary
by MITRE
Buffer overflow in Proxomitron Naoko 4.4 allows remote attackers to execute arbitrary code via a long request.
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Analysis
by VulDB Data Team • 06/16/2018
The vulnerability identified as CVE-2003-1429 represents a critical buffer overflow flaw within Proxomitron Naoko version 4.4, a web proxy server software designed for content filtering and proxy functionality. This vulnerability exists in the software's handling of incoming HTTP requests, specifically when processing requests that exceed predetermined buffer limits. The flaw stems from insufficient input validation mechanisms that fail to properly check the length of incoming request data before attempting to store it in fixed-size memory buffers. Such inadequate boundary checking creates a condition where maliciously crafted requests can overwrite adjacent memory locations, potentially leading to arbitrary code execution. The vulnerability is particularly concerning because it operates over network connections, allowing remote attackers to exploit the flaw without requiring local system access or authentication credentials.
The technical nature of this buffer overflow vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite memory regions. The flaw manifests when Proxomitron Naoko processes HTTP requests containing excessive data in headers or request bodies, causing the application to write beyond allocated memory boundaries. This condition can be exploited through carefully crafted HTTP requests that include oversized parameters, headers, or content that triggers the buffer overflow during parsing operations. The software's failure to implement proper input sanitization and length validation creates a direct pathway for attackers to manipulate memory layout and potentially redirect program execution flow. Attackers can leverage this vulnerability to inject malicious code that executes with the privileges of the Proxomitron process, typically running with elevated system permissions due to its proxy server nature.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with persistent access to systems running vulnerable Proxomitron instances. Remote code execution capabilities enable threat actors to install backdoors, modify proxy configurations, redirect traffic to malicious destinations, or extract sensitive information from network communications passing through the compromised proxy server. The vulnerability affects organizations relying on Proxomitron for content filtering, web caching, or network security purposes, potentially compromising entire network infrastructures. Since proxy servers often serve as central points for network traffic filtering and monitoring, exploitation could result in complete network infiltration, data exfiltration, or disruption of legitimate network services. The vulnerability's remote exploitability means that attackers can target systems from anywhere on the internet without requiring physical access or local network presence, making it particularly dangerous for organizations with exposed proxy server configurations.
Mitigation strategies for CVE-2003-1429 should prioritize immediate software updates and patches provided by the vendor, as the vulnerability is a well-documented flaw requiring specific code modifications to address the buffer overflow condition. Organizations should implement network segmentation and access controls to limit exposure of vulnerable proxy servers to external networks, utilizing firewalls to restrict direct access to proxy server ports. Input validation and sanitization measures should be implemented at network boundaries to filter out potentially malicious requests before they reach the vulnerable proxy server. The principle of least privilege should be enforced by running proxy server processes with minimal required permissions, reducing the potential impact of successful exploitation. Additionally, network monitoring and intrusion detection systems should be configured to detect unusual traffic patterns or large request sizes that might indicate exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar buffer overflow vulnerabilities in other network infrastructure components. Organizations should also consider migrating to more modern proxy server solutions that have been designed with security in mind and regularly updated to address known vulnerabilities.