CVE-2006-0166 in Norton System Works
Summary
by MITRE
Symantec Norton SystemWorks and SystemWorks Premier 2005 and 2006 stores temporary copies of files in the Norton Protected Recycle Bin NProtect directory, which is hidden from the FindFirst and FindNext Windows APIs and allows remote attackers to hide arbitrary files from virus scanners and other products.
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Analysis
by VulDB Data Team • 01/11/2019
This vulnerability exists in Symantec Norton SystemWorks and SystemWorks Premier 2005 and 2006 products where the software creates temporary file copies in a hidden directory called NProtect within the Norton Protected Recycle Bin. The flaw stems from the improper implementation of file system visibility controls, specifically bypassing standard Windows file enumeration APIs. The NProtect directory is designed to be invisible to standard file search operations using FindFirst and FindNext Windows APIs, which are fundamental system calls used by antivirus software and other security tools to scan file systems. This design creates a persistent hiding place for files that can evade detection by security applications that rely on these standard APIs for comprehensive system scanning. The vulnerability represents a significant security weakness in the software's file management architecture, as it provides a mechanism for malicious actors to conceal files from security monitoring tools. This behavior aligns with CWE-264, which addresses permissions, privileges, and access controls in software systems, and demonstrates how improper access control implementation can create security blind spots. The vulnerability is particularly concerning because it allows attackers to store arbitrary files in a location that standard security tools cannot easily detect or scan, effectively creating a covert storage area that bypasses traditional antivirus and security monitoring mechanisms.
The technical implementation of this vulnerability exploits the Windows API behavior by creating a hidden directory structure that intentionally excludes files from standard enumeration processes. When security tools perform file system scans using FindFirst and FindNext functions, they do not encounter files stored in the NProtect directory because the directory structure is designed to be invisible to these specific API calls. This creates a scenario where the operating system's standard security monitoring capabilities are effectively bypassed, allowing malicious files to remain undetected while appearing to be legitimate system files. The flaw demonstrates poor adherence to security best practices in file system design, as it violates the principle of least privilege and creates an unexpected access control bypass. From an operational perspective, this vulnerability allows for persistent threat concealment and can be exploited by malware authors who wish to maintain undetected presence on systems running affected software versions. The hidden directory structure essentially creates a security gap that enables attackers to store files that would normally be detected by standard antivirus scanning processes, effectively undermining the security posture of systems running the vulnerable software.
The impact of this vulnerability extends beyond simple file hiding capabilities and represents a serious threat to system security and integrity. Attackers can leverage this feature to store malicious payloads, backdoors, or other harmful files in the hidden NProtect directory, ensuring that these threats remain undetected by standard security monitoring tools. The vulnerability creates a persistent security gap that can be exploited for long-term system compromise, as the hidden files remain invisible to routine security scans and system monitoring processes. This type of vulnerability is particularly dangerous because it operates at the system level, potentially allowing attackers to maintain persistence while avoiding detection by security tools that rely on standard file system enumeration methods. The issue also highlights weaknesses in software design and implementation practices, as the software should not be creating hidden directories that bypass standard operating system security mechanisms. From an attacker's perspective, this vulnerability provides a reliable method for maintaining covert operations and can be used in conjunction with other attack vectors to create multi-layered persistence mechanisms. The vulnerability's impact is further amplified because it affects widely deployed security software, meaning that systems running these versions of Norton SystemWorks are inherently more vulnerable to undetected attacks.
Mitigation strategies for this vulnerability require both immediate remediation and long-term architectural improvements. The most effective immediate solution is to uninstall or upgrade to unaffected versions of Symantec Norton SystemWorks software, as this eliminates the vulnerable directory structure entirely. Organizations should also implement additional monitoring techniques that go beyond standard API-based file system scans, including registry monitoring, process monitoring, and specialized tools that can detect hidden directories through alternative methods. Security teams should conduct comprehensive system audits to identify any files that may have been hidden in the NProtect directory and ensure that all system components are properly scanned using multiple detection methods. The vulnerability underscores the importance of proper access control implementation and the need for software to not create security gaps through improper file system design. System administrators should also consider implementing additional security layers, such as endpoint detection and response solutions, that can detect anomalous behavior patterns that might indicate the presence of hidden files or directories. From a compliance standpoint, this vulnerability highlights the need for organizations to maintain up-to-date security software and to regularly audit their systems for potential security gaps that could be exploited by malicious actors. The issue also reinforces the importance of following security standards and best practices, such as those outlined in the Common Weakness Enumeration and MITRE ATT&CK framework, to prevent the creation of security bypass mechanisms in software implementations.