CVE-2012-4974 in Helpbox
Summary
by MITRE
Layton Helpbox 4.4.0 allows remote authenticated users to change the login context and gain privileges via a modified (1) loggedinenduser, (2) loggedinendusername, (3) loggedinuserusergroup, (4) loggedinuser, or (5) loggedinusername cookie.
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Analysis
by VulDB Data Team • 02/24/2019
The vulnerability identified as CVE-2012-4974 affects Layton Helpbox version 4.4.0 and represents a critical authentication bypass flaw that allows remote authenticated users to escalate their privileges. This issue stems from insufficient input validation and improper session management within the application's cookie handling mechanisms. The vulnerability specifically targets the authentication cookies that maintain user session state, including loggedinenduser, loggedinendusername, loggedinuserusergroup, loggedinuser, and loggedinusername parameters that are crucial for maintaining secure user contexts.
The technical flaw manifests through the manipulation of authentication cookies that are typically generated and managed server-side to maintain user sessions. When an authenticated user interacts with the Layton Helpbox application, these cookies are set to track the user's login status and associated privileges. The vulnerability occurs because the application does not adequately validate or sanitize the values contained within these cookies, allowing malicious actors to modify cookie contents to assume the identity of other users or escalate their privileges. This represents a classic session manipulation attack vector where the integrity of session tokens is compromised through client-side modification.
The operational impact of this vulnerability is severe as it enables attackers to gain unauthorized access to user accounts with elevated privileges, potentially leading to complete system compromise. An attacker who successfully exploits this vulnerability can impersonate legitimate users and access sensitive data, modify system configurations, or perform administrative functions depending on the privileges of the target accounts. The remote nature of this attack means that exploitation does not require physical access to the system or local network presence, making it particularly dangerous for web-based applications. This vulnerability essentially undermines the fundamental security principle of least privilege by allowing privilege escalation without proper authorization checks.
The vulnerability aligns with CWE-285, which addresses improper authorization issues in authentication systems, and represents a clear violation of proper session management practices. From an ATT&CK framework perspective, this vulnerability maps to T1548.001 (Abuse Elevation Control Mechanism) and T1078 (Valid Accounts) as it enables attackers to leverage existing authenticated sessions to gain elevated privileges. The attack vector specifically relates to T1566 (Phishing) or T1190 (Exploit Public-Facing Application) since it requires initial authentication but then allows for privilege escalation through cookie manipulation. Organizations should implement proper input validation, secure session management, and cryptographic integrity checks for all authentication cookies to prevent such vulnerabilities. The remediation involves ensuring that session tokens are properly validated server-side and that modifications to authentication cookies are detected and rejected to maintain the integrity of the authentication system.
This vulnerability demonstrates the critical importance of implementing proper session management controls and input validation in web applications. The flaw represents a fundamental weakness in how the application handles authentication state information, making it susceptible to manipulation by authenticated users who can exploit the lack of proper validation mechanisms. Organizations should conduct regular security assessments to identify similar session management vulnerabilities and ensure that all authentication-related components implement robust validation and integrity checking measures to prevent unauthorized privilege escalation attacks.