CVE-2003-1585 in Weblog Expert
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in WebLogExpert allows remote attackers to inject arbitrary web script or HTML via a crafted client domain name, related to an "Inverse Lookup Log Corruption (ILLC)" issue.
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Analysis
by VulDB Data Team • 04/30/2026
The vulnerability identified as CVE-2003-1585 represents a critical cross-site scripting flaw within WebLogExpert software that enables remote attackers to execute malicious web scripts or HTML code through manipulation of client domain names. This vulnerability specifically exploits an "Inverse Lookup Log Corruption (ILLC)" issue that occurs during the processing of web server log files, creating a pathway for attackers to inject malicious content that can persist in the application's log handling mechanisms. The flaw exists in the application's parsing and display logic where user-supplied domain names are not properly sanitized before being rendered in web interfaces, making it susceptible to XSS attacks that can compromise user sessions and data integrity.
Technical exploitation of this vulnerability relies on the application's handling of inverse DNS lookups during log file processing where domain names are resolved and stored in log databases. When attackers craft malicious domain names containing script tags or HTML elements, these inputs are processed through the ILLC mechanism and subsequently displayed in web interfaces without adequate output encoding or validation. This creates a persistent XSS vector where the malicious content is not only executed in the context of the vulnerable application but can also be stored and replayed to other users who view the affected log data. The vulnerability is classified under CWE-79 as Improper Neutralization of Input During Web Page Generation, specifically manifesting as a reflected XSS variant that occurs during log file processing rather than direct user input.
The operational impact of this vulnerability extends beyond simple script execution to encompass potential session hijacking, credential theft, and unauthorized data access within the WebLogExpert environment. Attackers can leverage this flaw to establish persistent access to user sessions, redirect victims to malicious websites, or inject content that modifies the application's behavior. The ILLC component creates additional complexity as it involves the corruption of log entries during inverse lookup processing, potentially affecting multiple log entries simultaneously and making detection more challenging. This vulnerability can be particularly dangerous in environments where WebLogExpert is used for security monitoring and log analysis, as attackers can inject malicious content that would then be processed and displayed in security reports, potentially masking their activities or compromising the integrity of security analysis.
Mitigation strategies for CVE-2003-1585 require comprehensive input validation and output encoding mechanisms throughout the WebLogExpert application. Organizations should implement strict domain name validation that filters or sanitizes potentially malicious input before log processing occurs, ensuring that all domain names are properly encoded when displayed in web interfaces. The application should employ proper HTML escaping and context-aware output encoding to prevent script execution regardless of input source. Additionally, implementing network-level restrictions and access controls can limit exposure by restricting direct access to log data and preventing unauthorized users from injecting malicious content through the inverse lookup mechanism. Security patches and updates to WebLogExpert should address the root cause by modifying the ILLC handling logic to prevent corruption of log entries and ensure that all user-supplied data undergoes proper sanitization before being processed or displayed. This vulnerability aligns with ATT&CK technique T1566 for Phishing and T1059 for Command and Scripting Interpreter, demonstrating how log file processing can become an attack surface for persistent web-based threats.