CVE-2012-0392 in Struts
Summary
by MITRE
The CookieInterceptor component in Apache Struts before 2.3.1.1 does not use the parameter-name whitelist, which allows remote attackers to execute arbitrary commands via a crafted HTTP Cookie header that triggers Java code execution through a static method.
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Analysis
by VulDB Data Team • 12/05/2024
The vulnerability identified as CVE-2012-0392 represents a critical security flaw in the Apache Struts framework that existed prior to version 2.3.1.1. This issue resides within the CookieInterceptor component, which serves as a crucial mechanism for handling HTTP cookie data in web applications built on the Struts framework. The flaw fundamentally undermines the security model by failing to implement proper parameter validation controls, creating an avenue for malicious actors to exploit the system through carefully crafted HTTP cookie headers. The vulnerability operates at the intersection of input validation and object instantiation, where the framework's failure to maintain a whitelist of acceptable parameter names creates a dangerous pathway for code execution.
The technical implementation of this vulnerability stems from the CookieInterceptor's improper handling of cookie data within the Struts request processing pipeline. When an application processes HTTP cookie headers without proper sanitization, the framework may inadvertently interpret cookie values as method invocation parameters. This occurs because Struts employs reflection-based mechanisms to map incoming data to application objects, and the absence of a parameter-name whitelist allows attackers to inject method names directly through cookie values. The exploitation mechanism leverages static method calls that are accessible through the reflection API, enabling remote attackers to execute arbitrary Java code on the server. This vulnerability aligns with CWE-94, which describes "Improper Control of Generation of Code" and specifically relates to the improper handling of untrusted data during code generation or execution phases.
The operational impact of CVE-2012-0392 extends far beyond simple data corruption or denial of service scenarios. Attackers can leverage this vulnerability to execute arbitrary commands on affected servers, potentially leading to complete system compromise and unauthorized access to sensitive data. The remote nature of the attack means that exploitation can occur from any location without requiring physical access to the target system. This vulnerability particularly affects web applications that rely on Struts for handling user sessions and maintaining state information through cookies, making it a significant concern for enterprise applications, e-commerce platforms, and any system that processes user authentication tokens through cookie mechanisms. The attack vector operates through standard HTTP cookie headers, making it difficult to detect through conventional network monitoring tools and allowing for stealthy exploitation over extended periods.
Organizations utilizing affected versions of Apache Struts should implement immediate mitigation strategies to protect their systems from exploitation attempts. The primary and most effective mitigation involves upgrading to Apache Struts version 2.3.1.1 or later, which includes proper parameter-name whitelisting mechanisms within the CookieInterceptor component. Additionally, implementing network-level controls such as web application firewalls and cookie header filtering can provide temporary protection while upgrades are pending. Security administrators should also conduct comprehensive vulnerability assessments to identify all applications running affected Struts versions and ensure proper input validation is implemented at multiple layers of the application architecture. The vulnerability demonstrates the critical importance of proper parameter validation and input sanitization, reinforcing principles outlined in the ATT&CK framework under the technique of "Command and Scripting Interpreter" where adversaries leverage application frameworks to execute malicious code. Organizations should also consider implementing runtime application self-protection mechanisms and regular security testing to prevent similar vulnerabilities from emerging in their application environments.