CVE-2007-2527 in DynamicPAD
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in DynamicPAD before 1.03.31 allow remote attackers to execute arbitrary PHP code via a URL in the HomeDir parameter to (1) dp_logs.php or (2) index.php.
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Analysis
by VulDB Data Team • 09/12/2024
The vulnerability identified as CVE-2007-2527 represents a critical remote file inclusion flaw affecting DynamicPAD versions prior to 103.31. This security weakness resides in the application's handling of user-supplied input through the HomeDir parameter, which is processed in two primary script files: dp_logs.php and index.php. The vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly restrict the paths or URLs that can be accepted by these parameters. Attackers can exploit this weakness by crafting malicious URLs and injecting them into the HomeDir parameter, thereby enabling arbitrary code execution on the target system.
This vulnerability maps directly to CWE-88, which describes improper neutralization of special elements used in an OS command, and more specifically to CWE-94, which addresses the execution of code from untrusted sources. The flaw creates an environment where attacker-controlled input flows directly into file inclusion operations without proper validation, allowing for the execution of malicious PHP code. The attack vector operates through HTTP requests that manipulate the application's file inclusion logic, potentially enabling full system compromise.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with the ability to escalate privileges and gain persistent access to the affected system. When exploited successfully, the vulnerability allows attackers to upload and execute malicious scripts, potentially leading to data theft, system compromise, or further lateral movement within the network. The remote nature of the attack means that exploitation can occur from any location with network access to the vulnerable application, making it particularly dangerous for web applications exposed to the internet.
Mitigation strategies for this vulnerability include immediate patching to version 1.03.31 or later, which addresses the input validation issues in the affected scripts. Additionally, implementing proper input sanitization measures such as validating and filtering all user-supplied input, particularly parameters used in file inclusion operations, is essential. Network segmentation and firewall rules can help limit access to vulnerable applications, while web application firewalls can provide additional protection against exploitation attempts. The implementation of secure coding practices, including the use of whitelisting for file paths and avoiding dynamic file inclusion based on user input, aligns with ATT&CK technique T1190 for exploiting vulnerabilities in web applications and represents a fundamental defense against this class of attack. Organizations should also conduct thorough security assessments to identify similar vulnerabilities in other applications and implement comprehensive input validation frameworks to prevent similar issues in the future.