CVE-2006-0625 in Spip
Summary
by MITRE
Directory traversal vulnerability in Spip_RSS.PHP in SPIP 1.8.2g and earlier allows remote attackers to read or include arbitrary files via ".." sequences in the GLOBALS[type_urls] parameter, which could then be used to execute arbitrary code via resultant direct static code injection in the file parameter to spip_acces_doc.php3.
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Analysis
by VulDB Data Team • 07/18/2018
The vulnerability identified as CVE-2006-0625 represents a critical directory traversal flaw within the SPIP content management system version 1.8.2g and earlier. This vulnerability resides in the Spip_RSS.PHP component and exploits improper input validation mechanisms that fail to adequately sanitize user-supplied data. The flaw specifically manifests when the application processes the GLOBALS[type_urls] parameter, which is susceptible to manipulation through directory traversal sequences using the ".." notation. This weakness enables attackers to navigate outside the intended directory structure and access arbitrary files on the server filesystem. The vulnerability operates under CWE-22, which categorizes directory traversal issues as a fundamental weakness in input validation, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter execution through file inclusion vulnerabilities. The impact extends beyond simple information disclosure to potentially enable full system compromise through code execution.
The technical exploitation of this vulnerability requires an attacker to craft malicious input that includes directory traversal sequences within the GLOBALS[type_urls] parameter. When processed by the vulnerable SPIP application, these sequences allow the system to traverse directories and access files that should remain protected. The vulnerability becomes particularly dangerous when combined with the spip_acces_doc.php3 component, which accepts a file parameter that can be manipulated to include malicious code. This creates a direct static code injection scenario where attacker-controlled content can be executed within the application context. The flaw demonstrates poor input sanitization practices and inadequate access controls that permit arbitrary file operations. Attackers can leverage this vulnerability to read sensitive configuration files, database credentials, or other critical system files, potentially leading to complete system compromise. The vulnerability exists due to insufficient validation of user input and lack of proper path normalization mechanisms within the application's file handling routines.
The operational impact of CVE-2006-0625 extends far beyond immediate exploitation capabilities to encompass significant risk to system integrity and data confidentiality. Organizations running vulnerable SPIP installations face potential exposure to unauthorized file access, data breaches, and complete system compromise. The vulnerability's ability to facilitate code execution through direct static injection creates a pathway for attackers to establish persistent access, deploy backdoors, or escalate privileges within the affected environment. This risk is compounded by the fact that the vulnerability affects older versions of SPIP where security patches may not be readily available or easily implementable. The exploitation chain requires minimal technical expertise and can be automated, making it particularly dangerous for organizations with limited security resources. Security teams must consider this vulnerability as a high-priority threat requiring immediate remediation, as it provides attackers with a straightforward path to system compromise and data exfiltration.
Mitigation strategies for CVE-2006-0625 must address both immediate remediation and long-term security improvements within the affected system environment. The primary recommendation involves upgrading to a patched version of SPIP that resolves the directory traversal vulnerability, as version 1.8.2h and later implementations contain proper input validation mechanisms. Organizations should implement comprehensive input sanitization procedures that validate and filter all user-supplied data before processing, particularly parameters that may influence file system operations. The implementation of proper access controls and path normalization techniques can prevent unauthorized directory traversal attempts. Additionally, network segmentation and firewall rules should be configured to limit access to vulnerable components and restrict unnecessary file system access. Security monitoring should be enhanced to detect suspicious file access patterns and parameter manipulation attempts. Organizations should also consider implementing web application firewalls that can detect and block directory traversal attack patterns. The vulnerability highlights the importance of maintaining up-to-date software versions and implementing robust security practices including regular vulnerability assessments and security code reviews to prevent similar weaknesses from emerging in future deployments.