CVE-2006-5232 in iSearch
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in iSearch 2.16 allow remote attackers to execute arbitrary PHP code via a URL in the isearch_path parameter in (1) index.php, (2) viewcache.php, (3) sitemap.php, (4) isearch.inc.php, (5) google_sitemap.php, (6) stats.php, or (7) auto_spider_img.php. NOTE: this issue has been disputed by a third party who shows that $isearch_path is set to a constant value. CVE analysis as of 20061010 is inconclusive, although the original researcher is known to make mistakes
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Analysis
by VulDB Data Team • 04/24/2026
The vulnerability described in CVE-2006-5232 represents a critical remote file inclusion flaw within the iSearch 2.16 web application, which operates under the PHP framework. This vulnerability manifests as a remote code execution risk that could potentially allow malicious actors to inject and execute arbitrary PHP code on the target server. The issue stems from improper input validation and sanitization within the application's core components, specifically affecting multiple entry points that process user-supplied URL parameters. The affected files include index.php, viewcache.php, sitemap.php, isearch.inc.php, google_sitemap.php, stats.php, and auto_spider_img.php, all of which accept the isearch_path parameter without adequate security measures. This type of vulnerability falls under the category of CWE-88, which describes improper neutralization of special elements used in an OS command, and more specifically aligns with CWE-94, which addresses the execution of arbitrary code or commands. The potential impact of such vulnerabilities extends beyond simple data theft, as attackers could leverage these weaknesses to establish persistent access, deploy malware, or use the compromised system as a launch point for further attacks within a network infrastructure. The ATT&CK framework categorizes this vulnerability under T1190 for Exploit Public-Facing Application, indicating that it targets accessible web applications that can be exploited from external networks.
The technical exploitation of this vulnerability requires an attacker to craft malicious URLs containing PHP code within the isearch_path parameter, which the application then includes and executes without proper validation. This type of flaw typically occurs when developers use functions like include() or require() with user-controllable input, creating an environment where external code can be seamlessly integrated into the application's runtime. The vulnerability's widespread nature across multiple files suggests a systemic design flaw in the application's architecture, where the same insecure parameter handling pattern is repeated throughout the codebase. Security researchers have noted that the vulnerability's severity is amplified by the fact that it affects core functionality files, potentially allowing attackers to manipulate the application's behavior at multiple levels. The original researcher's claims about the vulnerability have been disputed, indicating that the actual technical details may require further verification. However, the general principle of remote file inclusion vulnerabilities remains consistent with industry standards and has been well-documented in security literature. The disputed nature of this particular CVE highlights the importance of thorough validation and peer review in vulnerability assessment, as false positives can lead to unnecessary panic and misallocation of security resources. Organizations should maintain strict input validation practices and implement proper parameter sanitization to prevent such vulnerabilities from being exploited in real-world scenarios.
The operational impact of this vulnerability extends far beyond immediate code execution capabilities, as it represents a fundamental security weakness that could compromise entire web infrastructures. When exploited, this vulnerability could allow attackers to gain unauthorized access to sensitive data, manipulate application functionality, or use the compromised system for nefarious activities such as launching attacks against other systems or hosting malicious content. The affected files in iSearch 2.16 suggest that the vulnerability could impact various aspects of the application's functionality, from search capabilities to statistical reporting and sitemap generation. This comprehensive exposure makes the vulnerability particularly dangerous, as it provides multiple attack vectors and potential entry points for malicious actors. Organizations using affected versions of iSearch should immediately implement mitigations including input validation, parameter sanitization, and the removal of user-controllable variables from include statements. The vulnerability's classification as disputed does not diminish the need for proper security practices, as similar issues have been successfully exploited in numerous other applications throughout the history of web development. The security community has long recognized that such vulnerabilities often serve as initial access points for more sophisticated attacks, making early detection and remediation critical for maintaining overall system integrity. Proper security posture requires not only addressing specific vulnerabilities but also implementing robust architectural principles that prevent similar issues from arising in future development cycles.