CVE-2009-0735 in Papoo
Summary
by MITRE
Directory traversal vulnerability in lib/classes/message_class.php in Papoo CMS 3.6, when register_globals is enabled and magic_quotes_gpc is disabled, allows remote attackers to read and possibly execute arbitrary files via a .. (dot dot) in the pfadhier parameter. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 11/23/2024
The vulnerability described in CVE-2009-0735 represents a critical directory traversal flaw within the Papoo CMS 3.6 content management system. This weakness exists in the message_class.php file and specifically exploits the insecure handling of user input parameters. The vulnerability becomes particularly dangerous when the web server configuration has register_globals enabled and magic_quotes_gpc disabled, creating an environment where malicious input can be directly interpreted as PHP variables. The attack vector utilizes the pfadhier parameter which, when manipulated with .. (dot dot) sequences, allows attackers to navigate outside the intended directory structure and access arbitrary files on the server. This configuration combination essentially removes crucial security layers that would normally prevent such path manipulation attacks.
The technical exploitation of this vulnerability falls under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw demonstrates a classic example of how insecure input validation can lead to unauthorized file access, potentially exposing sensitive system files, configuration data, or even allowing remote code execution. When register_globals is enabled, user-supplied input becomes directly available as PHP variables, while the absence of magic_quotes_gpc means that special characters like backslashes are not automatically escaped, creating an ideal environment for path traversal exploitation. Attackers can leverage this vulnerability to read system files, access database configuration files, or potentially execute malicious code if the application has write permissions to critical directories.
From an operational perspective, this vulnerability presents significant risks to organizations using Papoo CMS 3.6 in environments with insecure PHP configurations. The impact extends beyond simple information disclosure to potential system compromise, as attackers may gain access to administrative files, user credentials, or application source code that could reveal additional attack vectors. The vulnerability's exploitation requires minimal technical skill and can be automated using common web exploitation tools, making it particularly dangerous for widespread deployment. Organizations running vulnerable systems face potential data breaches, system compromise, and regulatory compliance violations if sensitive information is exposed through this attack vector. The vulnerability also demonstrates how legacy CMS implementations can harbor dangerous security flaws when deployed in insecure configurations, highlighting the importance of proper security hardening.
Mitigation strategies for this vulnerability must address both the immediate configuration issues and the underlying software flaw. The most effective immediate solution involves disabling register_globals and enabling magic_quotes_gpc in the PHP configuration, which would prevent the exploitation of this particular vulnerability. System administrators should also implement proper input validation and sanitization mechanisms to ensure that all user-supplied parameters are properly validated before being processed. Additionally, organizations should consider implementing web application firewalls to detect and block suspicious path traversal attempts, and should conduct regular security audits to identify and remediate similar configuration vulnerabilities across their infrastructure. The ATT&CK framework categorizes this type of vulnerability under T1059 for execution through command and scripting interpreters, while also aligning with T1566 for credential access through privilege escalation techniques that may be possible once initial access is gained through such directory traversal exploits.