CVE-2015-3374 in Corner Module
Summary
by MITRE
Multiple cross-site request forgery (CSRF) vulnerabilities in the Corner module for Drupal allow remote attackers to hijack the authentication of administrators for requests that (1) enable or (2) disable corners via unspecified vectors.
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Analysis
by VulDB Data Team • 03/19/2019
The vulnerability identified as CVE-2015-3374 represents a critical cross-site request forgery weakness within the Corner module for Drupal content management systems. This flaw exists in the module's handling of administrative functions and provides attackers with the capability to manipulate administrator sessions through carefully crafted malicious requests. The vulnerability specifically affects the module's ability to verify the authenticity of requests aimed at enabling or disabling corner features, which are typically administrative functions that require proper authorization.
The technical implementation of this CSRF vulnerability stems from the absence of proper authentication tokens or session validation mechanisms within the Corner module's administrative interfaces. When administrators perform actions such as enabling or disabling corners, the module fails to adequately verify that these requests originate from legitimate administrative sessions. This omission creates a pathway for remote attackers to construct malicious web pages or exploit existing vulnerabilities in web browsers to trick authenticated administrators into executing unintended administrative actions without their knowledge or consent.
The operational impact of this vulnerability extends beyond simple privilege escalation as it enables attackers to manipulate core system functionality through unauthorized administrative commands. An attacker could potentially disable security features, enable malicious corners that could serve as attack vectors, or modify system configurations that could compromise the entire Drupal installation. The unspecified vectors mentioned in the description suggest that multiple attack paths exist, making the vulnerability particularly dangerous as it may be exploitable through various means including social engineering, embedded malicious content, or through compromised websites that could host the malicious payloads.
This vulnerability aligns with CWE-352, which specifically addresses cross-site request forgery weaknesses in web applications, and demonstrates how inadequate input validation and session management can create persistent security risks. From an ATT&CK framework perspective, this vulnerability maps to T1078 which covers valid accounts and T1566 which covers phishing techniques, as attackers could leverage this weakness to gain unauthorized access to administrative functions. The vulnerability also relates to T1210 which covers exploitation of remote services, as the attack vector involves manipulating remote administrative functions through web-based interfaces.
Organizations running Drupal systems with the Corner module installed face significant risk from this vulnerability, particularly if administrators frequently access the system from untrusted networks or if the system lacks additional security controls such as two-factor authentication or network segmentation. The exploitation requires minimal technical expertise and can be accomplished through simple web-based attacks, making it particularly dangerous for widespread deployment. Immediate remediation should involve applying the vendor-provided security patches, disabling the Corner module if it is not actively required, or implementing additional web application firewall rules to detect and block malicious CSRF requests. Additionally, organizations should conduct comprehensive security assessments of their Drupal installations to identify other potentially vulnerable modules and ensure proper session management practices are in place across all administrative interfaces.