CVE-2005-3129 in Serendipity
Summary
by MITRE
Cross-site request forgery (CSRF) vulnerability in Serendipity 0.8.4 and earlier allows remote attackers to perform unauthorized actions as a logged in user via a link or IMG tag to serendipity_admin.php.
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Analysis
by VulDB Data Team • 07/12/2018
The cross-site request forgery vulnerability identified as CVE-2005-3129 affects Serendipity versions 0.8.4 and earlier, representing a critical security flaw that undermines the integrity of web application authentication mechanisms. This vulnerability resides in the administrative interface of the Serendipity blog system, specifically within the serendipity_admin.php script which handles administrative operations. The flaw stems from the absence of proper request validation and anti-CSRF token implementation, allowing malicious actors to craft deceptive web requests that appear to originate from authenticated users.
The technical implementation of this vulnerability exploits the fundamental weakness in web application security where session tokens or authentication credentials are not properly verified for each request. When a user is logged into the Serendipity administration panel, their authentication state is maintained through cookies or session identifiers that are automatically included with each HTTP request. Attackers can leverage this by embedding malicious links or image tags within other websites or email messages that point to the serendipity_admin.php endpoint with specific parameters designed to execute administrative functions such as creating new users, modifying content, or changing system configurations. The vulnerability specifically targets the lack of CSRF protection mechanisms that would normally validate that requests originate from legitimate sources within the same domain.
The operational impact of this vulnerability extends far beyond simple data theft, as it enables attackers to assume full administrative privileges within the compromised blog system. An attacker could potentially create new administrator accounts, modify or delete content, install malicious plugins, or even compromise the entire server if the blog system is not properly isolated from other network resources. The remote nature of this attack means that victims need not be technically savvy to fall victim, as simply visiting a malicious webpage or clicking on a link embedded in an email could result in unauthorized administrative actions being performed without the user's knowledge or consent. This vulnerability directly violates the principle of least privilege and undermines the trust model that web applications rely upon for maintaining secure user sessions.
Organizations and individuals using affected versions of Serendipity should immediately implement multiple layers of mitigation strategies to protect against this vulnerability. The primary remediation involves upgrading to a patched version of Serendipity that implements proper CSRF token validation mechanisms, typically through the inclusion of unique tokens that are generated per session and validated on each administrative request. Additionally, implementing Content Security Policy headers can help mitigate the impact of malicious content delivery, while network-level firewalls can restrict direct access to administrative endpoints from untrusted networks. Security professionals should also consider implementing web application firewalls that can detect and block suspicious patterns of administrative requests. From a compliance perspective, this vulnerability aligns with CWE-352 which specifically addresses Cross-Site Request Forgery, and it maps to ATT&CK technique T1078 which covers valid accounts as a means of persistence and privilege escalation. The vulnerability demonstrates how seemingly minor implementation flaws in authentication systems can result in complete system compromise, highlighting the critical importance of following secure coding practices and implementing comprehensive security controls throughout the application lifecycle.