CVE-2012-1216 in PBBoard
Summary
by MITRE
Multiple cross-site request forgery (CSRF) vulnerabilities in admin.php in PBBoard 2.1.4 allow remote attackers to hijack the authentication of administrators for requests that (1) upload a file via an add action or (2) change the contents of a file via a dit action.
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Analysis
by VulDB Data Team • 02/14/2019
The vulnerability identified as CVE-2012-1216 represents a critical cross-site request forgery weakness in PBBoard version 2.1.4's administrative interface. This flaw resides in the admin.php script and enables malicious actors to exploit the authentication mechanisms of administrators through carefully crafted requests. The vulnerability specifically targets two distinct attack vectors that could lead to complete administrative compromise and unauthorized modifications within the forum system.
The technical implementation of this CSRF vulnerability stems from the absence of proper validation mechanisms for administrative actions within the PBBoard administration panel. When administrators perform actions such as file uploads or content modifications through the add or dit functions in admin.php, the application fails to verify the authenticity of the request source. This absence of anti-CSRF tokens or similar protective measures creates an exploitable condition where attackers can craft malicious web pages that automatically submit requests to the vulnerable admin.php endpoint. The flaw operates under the principle that authenticated sessions can be hijacked through forged requests, bypassing normal authentication checks.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with direct control over the forum's administrative functions. Successful exploitation allows remote attackers to upload malicious files to the server, potentially leading to remote code execution if the uploaded files are executable or if the server configuration permits such operations. Additionally, the ability to modify file contents through the dit action could enable attackers to alter core forum components, inject malicious code, or manipulate user data and permissions. The attack requires minimal technical expertise and can be executed through simple HTML forms or JavaScript code, making it particularly dangerous in environments where administrators regularly access the system.
This vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in software applications. The flaw demonstrates poor input validation and inadequate session management practices that violate fundamental security principles. From an ATT&CK framework perspective, this vulnerability maps to the privilege escalation and persistence tactics, as attackers can gain administrative access and maintain control over the compromised system. The attack chain typically involves initial reconnaissance to identify the vulnerable PBBoard installation, followed by crafting of malicious payloads that exploit the CSRF weakness to execute administrative functions without proper authorization. Organizations should implement comprehensive mitigations including the deployment of anti-CSRF tokens, proper session management, and regular security assessments to prevent such vulnerabilities from being exploited in real-world scenarios.
The exploitation of this vulnerability highlights the critical importance of implementing robust security controls in web applications, particularly those with administrative interfaces. The flaw demonstrates how seemingly simple missing validation mechanisms can lead to complete system compromise, emphasizing the need for comprehensive security testing and adherence to secure coding practices throughout the software development lifecycle.