CVE-2009-4407 in PyForum
Summary
by MITRE
Multiple cross-site request forgery (CSRF) vulnerabilities in PyForum 1.0.3 and possibly earlier versions, and possibly zForum, allow remote attackers to hijack the authentication of victims for requests that change passwords, and other unspecified requests, via unknown vectors.
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Analysis
by VulDB Data Team • 01/25/2019
The vulnerability identified as CVE-2009-4407 represents a critical cross-site request forgery weakness affecting PyForum version 1.0.3 and potentially earlier releases, with similar concerns noted for zForum applications. This flaw resides within the web application's session management and request validation mechanisms, creating a pathway for malicious actors to exploit user authentication contexts without proper authorization. The vulnerability specifically targets the authentication flow by enabling attackers to manipulate session tokens or authentication cookies in ways that allow them to perform unauthorized actions on behalf of authenticated users.
The technical implementation of this CSRF vulnerability stems from the absence of proper anti-CSRF tokens or validation mechanisms within the application's form processing and request handling components. When users navigate to malicious sites or receive crafted email attachments containing embedded requests, the vulnerable forum software fails to verify that requests originate from legitimate user interactions within the application's own domain. This weakness allows attackers to construct malicious web pages or email content that, when visited by authenticated forum users, automatically submits requests to the forum server that change user passwords or perform other administrative functions. The unspecified nature of the affected requests indicates that multiple application functions may be vulnerable to this exploitation technique.
The operational impact of this vulnerability extends beyond simple credential theft, as successful exploitation could enable attackers to completely compromise user accounts and potentially gain control over forum administration functions. An attacker could change user passwords to lock out legitimate users, modify forum content, or escalate privileges within the application. The remote nature of this attack vector means that exploitation does not require physical access to the target system or network, making it particularly dangerous for web applications that handle sensitive user data or provide administrative capabilities. This vulnerability directly impacts the principle of least privilege and authentication integrity, allowing unauthorized modifications to user sessions and application state.
Mitigation strategies for CVE-2009-4407 should prioritize immediate implementation of anti-CSRF token mechanisms within the application's request processing pipeline. The solution involves generating unique, unpredictable tokens for each user session and requiring their validation before processing any state-changing requests. This approach aligns with established security practices outlined in CWE-352, which specifically addresses cross-site request forgery vulnerabilities in web applications. Additionally, implementing proper origin validation and using the SameSite cookie attributes can provide additional protection layers. The application should also enforce strict session management practices including session timeout mechanisms and secure cookie attributes to prevent session hijacking attempts that could compound the CSRF vulnerability. Organizations should conduct comprehensive security testing to identify all potential CSRF attack vectors within their web applications and establish regular vulnerability assessment procedures to maintain defense-in-depth against similar threats. The remediation process should include thorough code reviews to ensure that all user-facing forms and state-changing endpoints properly implement CSRF protection mechanisms, following industry standards such as those referenced in the ATT&CK framework for web application security controls.