CVE-2006-5311 in Buzlas
Summary
by MITRE
PHP remote file inclusion vulnerability in includes/archive/archive_topic.php in Buzlas 2006-1 Full allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.
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Analysis
by VulDB Data Team • 04/24/2026
The vulnerability identified as CVE-2006-5311 represents a critical remote file inclusion flaw within the Buzlas 2006-1 Full web application, specifically affecting the includes/archive/archive_topic.php file. This vulnerability falls under the category of insecure direct object references and improper input validation, creating a pathway for malicious actors to execute arbitrary code on the target system. The flaw occurs when the application fails to properly sanitize user-supplied input passed through the phpbb_root_path parameter, allowing attackers to inject malicious URLs that are then included and executed as PHP code.
The technical exploitation of this vulnerability leverages the PHP include functionality to load remote files from attacker-controlled servers. When a user submits a request containing a malicious URL in the phpbb_root_path parameter, the vulnerable application processes this input without adequate validation, leading to the inclusion of external PHP code that executes within the context of the web server. This creates a severe security risk as attackers can upload and execute malicious scripts, potentially gaining full control over the affected system. The vulnerability aligns with CWE-98, which describes improper input validation leading to inclusion of files from untrusted sources, and represents a classic example of a remote code execution vulnerability that can be exploited through web application interfaces.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with the capability to establish persistent access, escalate privileges, and potentially compromise entire web infrastructures. Once exploited, attackers can manipulate database contents, steal sensitive information, modify application behavior, or use the compromised system as a launch point for further attacks against internal networks. The vulnerability affects the confidentiality, integrity, and availability of the affected web application and underlying systems. Organizations using Buzlas 2006-1 Full are particularly at risk due to the widespread nature of the PHP include functionality and the relatively simple exploitation method that requires minimal technical expertise.
Mitigation strategies for CVE-2006-5311 should focus on immediate patching of the affected application, implementing proper input validation, and configuring web server security measures to prevent remote file inclusion attacks. The most effective approach involves updating to the latest version of Buzlas or applying the vendor-specific patch that addresses the input validation flaw. Additionally, administrators should implement parameter validation that rejects any input containing suspicious characters or protocols, particularly those associated with remote file access such as http, https, or ftp. Security measures should include disabling remote file inclusion in PHP configuration, implementing web application firewalls, and establishing proper input sanitization routines that conform to industry standards such as those outlined in the OWASP Top Ten. Network segmentation and monitoring for suspicious file inclusion patterns can also provide additional layers of defense against exploitation attempts.