CVE-2003-1584 in SurfStats
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in SurfStats 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.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 04/30/2026
The vulnerability identified as CVE-2003-1584 represents a significant cross-site scripting flaw within the SurfStats web analytics software that enables remote attackers to execute malicious scripts in the context of victim browsers. This vulnerability specifically manifests through a crafted client domain name that triggers what is termed an "Inverse Lookup Log Corruption (ILLC)" issue within the application's processing mechanisms. The flaw exists in the software's handling of domain name resolution and logging processes, where improper input validation allows maliciously formatted domain names to bypass security checks and execute unintended code within the victim's browser environment.
The technical implementation of this vulnerability stems from insufficient sanitization of user-supplied input during the domain name processing phase of SurfStats' logging functionality. When the application performs inverse DNS lookups on client domain names, it fails to properly escape or validate the output before incorporating it into web page responses. This creates an opening for attackers to inject malicious JavaScript code or HTML content that gets executed when legitimate users view the affected web pages. The ILLC issue specifically refers to how corrupted or malformed domain name data can be inadvertently processed and displayed, creating persistent XSS vectors that can be exploited across multiple user sessions.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users. This represents a critical security risk for organizations relying on SurfStats for web analytics, as compromised systems could lead to unauthorized access to sensitive data, session hijacking, or the deployment of additional malware. The vulnerability's persistence is heightened by the fact that the malicious code becomes embedded within the application's log files and is subsequently served to other users, creating a propagation mechanism that can affect multiple users over time. This aligns with CWE-79 which categorizes cross-site scripting vulnerabilities as weaknesses in input validation and output encoding.
Mitigation strategies for this vulnerability require immediate implementation of proper input sanitization and output encoding mechanisms throughout the SurfStats application. Organizations should ensure that all domain name data undergoes rigorous validation and encoding before being processed or displayed in web interfaces. The solution involves implementing strict validation of DNS lookup results, proper HTML escaping of all dynamic content, and regular input filtering to prevent malicious payloads from being executed. Additionally, implementing content security policies and regular security audits of web applications can help prevent similar vulnerabilities from emerging in the future. This vulnerability demonstrates the importance of input validation in web applications and aligns with ATT&CK technique T1059.007 for script injection, where adversaries leverage application vulnerabilities to execute malicious code in user browsers. Organizations should also consider updating to patched versions of SurfStats or implementing web application firewalls to protect against exploitation attempts while permanent fixes are being deployed.