CVE-2006-2896 in FunkBoard
Summary
by MITRE
profile.php in FunkBoard CF0.71 allows remote attackers to change arbitrary passwords via a modified uid hidden form field in an Edit Profile action.
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Analysis
by VulDB Data Team • 07/01/2024
The vulnerability identified as CVE-2006-2896 resides within the FunkBoard CF0.71 web application, specifically in the profile.php component that handles user profile management functionalities. This issue represents a classic authorization bypass vulnerability that allows unauthenticated attackers to manipulate user account credentials through improper input validation and insufficient access control mechanisms. The flaw manifests when users attempt to edit their profiles, as the application fails to properly verify the identity of the user attempting to modify account details.
The technical implementation of this vulnerability stems from a lack of proper authentication checks within the profile editing workflow. When a user accesses the edit profile functionality, the application generates a form containing a hidden uid field that should ideally be validated against the currently logged-in user session. However, the application accepts any value provided in this hidden field without performing proper verification, allowing attackers to modify arbitrary user accounts simply by changing the uid parameter to target a different user. This represents a fundamental breakdown in the principle of least privilege and proper session management, where the system fails to ensure that users can only modify their own profile information.
The operational impact of this vulnerability extends beyond simple credential theft, as it provides attackers with the ability to compromise multiple user accounts within the FunkBoard system. An attacker could potentially gain unauthorized access to other users' accounts, modify their personal information, or even escalate privileges if the compromised accounts possess administrative capabilities. This vulnerability directly violates the security principle of access control enforcement and enables privilege escalation attacks that could lead to complete system compromise. The vulnerability is particularly dangerous because it requires minimal technical expertise to exploit, making it a prime target for automated attack tools that can systematically test and exploit such flaws across multiple users.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and authentication checks within the profile editing functionality. The system must validate that any uid parameter provided in the edit profile form corresponds to the currently authenticated user session before allowing modifications to proceed. This requires implementing robust session management practices that ensure user identity verification occurs at every step of the profile modification process. Organizations should also consider implementing additional security controls such as input sanitization, parameterized queries, and proper error handling to prevent information disclosure. The vulnerability aligns with CWE-285, which addresses improper authorization in software applications, and maps to ATT&CK technique T1078 for valid accounts and T1531 for credential access through privilege escalation. Regular security audits and code reviews should be conducted to identify similar authorization bypass vulnerabilities, and the application should be updated to ensure proper session management and access control enforcement mechanisms are in place.