CVE-2016-9456 in Adserver
Summary
by MITRE
Revive Adserver before 3.2.3 suffers from Cross-Site Request Forgery (CSRF). The Revive Adserver team conducted a security audit of the admin interface scripts in order to identify and fix other potential CSRF vulnerabilities. Over 20+ such issues were fixed.
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Analysis
by VulDB Data Team • 11/22/2022
CVE-2016-9456 represents a critical cross-site request forgery vulnerability affecting Revive Adserver versions prior to 3.2.3, demonstrating a fundamental flaw in the administrative interface security model. This vulnerability falls under the Common Weakness Enumeration category CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in web applications. The issue stems from the absence of proper anti-CSRF token validation mechanisms within the admin interface scripts, allowing malicious actors to forge requests that appear to originate from authenticated administrators. The vulnerability was identified during a comprehensive security audit conducted by the Revive Adserver development team, highlighting the critical need for robust authentication and authorization controls in web-based management interfaces. The audit revealed that over twenty distinct CSRF vulnerabilities existed across various administrative functions, indicating a systemic security gap rather than an isolated incident.
The technical implementation of this vulnerability exploits the trust relationship between the web application and authenticated users, where legitimate administrative actions can be performed without proper verification of user intent. Attackers can craft malicious web pages or emails containing hidden form submissions or crafted API requests that automatically execute administrative functions when an authenticated user visits the malicious page. The vulnerability particularly affects the administrative interface scripts that handle sensitive operations such as user management, configuration changes, and ad campaign modifications. Without proper CSRF token validation, the application cannot distinguish between legitimate requests initiated by the authenticated administrator and malicious requests crafted by an attacker. This flaw enables attackers to perform unauthorized administrative actions, potentially leading to complete system compromise, data manipulation, or service disruption.
The operational impact of CVE-2016-9456 extends beyond simple privilege escalation, as it provides attackers with the ability to manipulate the ad serving infrastructure that many organizations rely upon for revenue generation. An attacker exploiting this vulnerability could modify ad campaigns, change user permissions, or even delete critical system configurations, potentially causing significant financial loss and operational disruption. The vulnerability affects organizations that depend on Revive Adserver for their digital advertising infrastructure, making it particularly dangerous for advertising agencies, publishers, and digital marketing platforms. The fact that over twenty similar vulnerabilities were discovered during the audit suggests that the entire administrative interface was inadequately protected, indicating a broader security architecture weakness that could lead to additional exploitation vectors. This vulnerability directly maps to several ATT&CK tactics including privilege escalation and persistence, as attackers can establish long-term access through administrative control.
Organizations affected by CVE-2016-9456 should immediately implement the security patches released with Revive Adserver version 3.2.3, which address the CSRF token validation issues across the administrative interface. The mitigation strategy should include comprehensive testing of the patched environment to ensure all administrative functions properly validate anti-CSRF tokens. Network segmentation and additional authentication controls should be implemented to reduce the attack surface, particularly for administrative interfaces. Regular security audits should be conducted to identify similar vulnerabilities in other web applications and administrative interfaces. The vulnerability also highlights the importance of implementing the principle of least privilege for administrative accounts and ensuring that administrative functions require explicit user confirmation before execution. Organizations should also consider implementing additional monitoring and logging of administrative activities to detect potential unauthorized access attempts. The fix addresses the core issue by implementing proper anti-CSRF token validation mechanisms that are consistent with industry best practices for web application security.