CVE-2006-0683 in Virtual Hosting Control System
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Virtual Hosting Control System (VHCS) 2.4.7.1 with v.1 patch and earlier allows remote attackers to inject arbitrary web script or HTML via the username, which is recorded in a log file but not properly handled when the administrator uses the admin log utility to read the log file.
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Analysis
by VulDB Data Team • 07/31/2017
The vulnerability identified as CVE-2006-0683 represents a critical cross-site scripting flaw within the Virtual Hosting Control System version 2.4.7.1 and earlier releases. This security weakness specifically manifests when the system processes user input through the username field, which gets recorded in log files without proper sanitization or encoding mechanisms. The vulnerability resides in the administrative log utility that reads these log files, creating a pathway for malicious actors to execute arbitrary web scripts or HTML code within the context of authenticated administrator sessions.
The technical exploitation of this vulnerability follows a classic XSS attack pattern where an attacker crafts a malicious username containing embedded script code that gets stored in the system's log files. When system administrators access these log files through the administrative interface, the stored malicious code executes in their browser context, potentially leading to session hijacking, privilege escalation, or data exfiltration. This represents a server-side vulnerability where the flaw occurs during data processing rather than in the presentation layer, making it particularly dangerous as it can affect users with elevated privileges.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with potential access to sensitive administrative functions and system information. The vulnerability affects the integrity and confidentiality of the system's logging infrastructure, which serves as a critical security control for monitoring and auditing system activities. Attackers could leverage this flaw to gain unauthorized access to administrative interfaces, modify system configurations, or establish persistent access points within the hosting environment. The vulnerability's classification aligns with CWE-79 - Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly encode or escape user-controllable input before including it in web pages.
From a threat modeling perspective, this vulnerability maps to multiple ATT&CK techniques including T1059.007 - Command and Scripting Interpreter: JavaScript and T1566.001 - Phishing: Spearphishing Attachment. The attack surface is particularly concerning for hosting providers who rely on centralized administrative interfaces, as successful exploitation could compromise entire hosting environments. The patch level mentioned in the vulnerability description indicates that this issue was addressed in version 1 of the patch, suggesting that the vendor recognized the severity of the flaw and implemented proper input sanitization mechanisms to prevent script execution during log file processing.
Mitigation strategies for this vulnerability should include immediate implementation of proper input validation and output encoding mechanisms within the logging and administrative interfaces. Organizations should ensure that all user-controllable data is properly escaped before being stored in log files and before presentation to administrators. The solution involves implementing strict input filtering and output encoding practices that prevent HTML and script code from being interpreted as executable content. Additionally, regular security assessments of logging systems and administrative interfaces should be conducted to identify similar vulnerabilities that could allow similar attack vectors. Security measures should also include monitoring for unusual administrative log access patterns that might indicate exploitation attempts.