CVE-2007-4525 in SPIP
Summary
by MITRE
** DISPUTED ** PHP remote file inclusion vulnerability in inc-calcul.php3 in SPIP 1.7.2 allows remote attackers to execute arbitrary PHP code via a URL in the squelette_cache parameter, a different vector than CVE-2006-1702. NOTE: this issue has been disputed by third party researchers, stating that the squelette_cache variable is initialized before use, and is only used within the scope of a function.
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Analysis
by VulDB Data Team • 09/07/2018
The vulnerability described in CVE-2007-4525 represents a disputed remote file inclusion issue within the SPIP content management system version 1.7.2. This particular flaw was identified in the inc-calcul.php3 file and involved the squelette_cache parameter which could potentially allow remote attackers to execute arbitrary PHP code. The vulnerability presents a significant security risk as it could enable attackers to inject and execute malicious code on the target server, potentially leading to complete system compromise.
The technical nature of this vulnerability aligns with CWE-88, which describes improper neutralization of special elements used in an expression, command, or query. This particular issue demonstrates how parameter manipulation can lead to code execution when user input is not properly validated or sanitized. The specific vector involves the squelette_cache parameter which, according to the original vulnerability report, could be manipulated to include remote URLs that would then be executed by the PHP interpreter. This represents a classic remote file inclusion vulnerability that has been a persistent threat in web application security for many years.
The operational impact of this vulnerability is substantial as it could allow attackers to gain unauthorized access to the web server hosting the SPIP application. Once exploited, the attacker could potentially execute commands with the privileges of the web server process, leading to data theft, system compromise, or further lateral movement within the network. The vulnerability's classification as a remote code execution flaw means that no user interaction would be required on the part of the victim, making it particularly dangerous. The fact that this vulnerability was reported in a version of SPIP that was already considered outdated at the time of discovery further compounds the risk as organizations may have been running vulnerable systems without proper patching.
Despite the original vulnerability report, third-party researchers have disputed the existence of this specific flaw, arguing that the squelette_cache variable is properly initialized before use and only operates within a function scope. This dispute highlights the complexity of vulnerability analysis and the importance of thorough validation before accepting security reports. The disagreement between researchers demonstrates how different interpretations of code behavior can lead to conflicting assessments of actual risk. Such disputes are common in the security community and underscore the need for detailed code analysis and reproducible testing. The ATT&CK framework would categorize this vulnerability under T1190 - Exploit Public-Facing Application, as it involves exploiting a vulnerability in a publicly accessible web application component. The disputed nature of this vulnerability also reflects the challenges in vulnerability validation and the importance of community peer review in security research. Organizations should maintain awareness of such disputed vulnerabilities while focusing on proper input validation and secure coding practices to prevent similar issues in their own applications.
The vulnerability serves as an example of how seemingly minor parameter handling issues can escalate into major security concerns when not properly addressed through defensive programming techniques. The disputed nature of the vulnerability also emphasizes the importance of understanding the actual code execution flow rather than relying solely on reported behavior, as the scope and initialization of variables can significantly impact whether a vulnerability actually exists.