CVE-2011-2463 in ColdFusion
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Adobe ColdFusion 8.0 through 9.0.1 allows remote attackers to inject arbitrary web script or HTML via vectors involving the cfform tag.
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Analysis
by VulDB Data Team • 03/19/2021
The vulnerability identified as CVE-2011-2463 represents a critical cross-site scripting flaw within Adobe ColdFusion versions 8.0 through 9.0.1 that fundamentally compromises web application security. This weakness specifically targets the cfform tag implementation within the ColdFusion framework, creating an exploitable entry point for malicious actors to inject arbitrary web scripts or HTML content into web applications. The vulnerability stems from insufficient input validation and output encoding mechanisms within the ColdFusion rendering engine, particularly when processing form elements that are processed server-side. Attackers can leverage this flaw by crafting malicious payloads that are then executed in the context of other users' browsers, potentially leading to session hijacking, credential theft, or unauthorized data manipulation. The impact is particularly severe given that ColdFusion was widely deployed in enterprise environments where it served as a backbone for numerous web applications handling sensitive business data.
The technical exploitation of this vulnerability occurs through the improper handling of user-supplied data within the cfform tag structure. When ColdFusion processes form elements, it fails to adequately sanitize or encode user input before rendering it back to the browser, creating an environment where malicious scripts can be embedded within form fields and subsequently executed. This vulnerability is classified as a classic reflected XSS attack vector, where the malicious payload is transmitted through a web application and then reflected back to the user's browser. The flaw manifests when the cfform tag processes parameters that contain unescaped special characters, allowing attackers to inject script tags or other malicious content that executes in the victim's browser context. This behavior aligns with CWE-79, which specifically addresses Cross-site Scripting vulnerabilities in software applications. The vulnerability is particularly dangerous because it operates within the server-side processing environment, meaning that even if client-side validation exists, the server-side processing can still be bypassed through crafted requests that directly target the vulnerable cfform implementation.
The operational impact of CVE-2011-2463 extends far beyond simple script injection, as it provides attackers with a foothold for more sophisticated attacks within compromised web applications. Once an attacker successfully exploits this vulnerability, they can execute arbitrary JavaScript code in the context of authenticated users, potentially allowing them to steal session cookies, perform actions on behalf of users, or redirect users to malicious websites. The vulnerability's persistence across multiple versions of ColdFusion (8.0 through 9.0.1) indicates a fundamental flaw in the framework's input handling mechanisms that affected a significant portion of the ColdFusion user base. Organizations running these vulnerable versions faced substantial risk of data breaches, as the vulnerability could be exploited by remote attackers without requiring any special privileges or authentication. This type of vulnerability directly maps to several ATT&CK techniques including T1566 for Phishing and T1059 for Command and Scripting Interpreter, as attackers could use the XSS capability to establish persistent access or deliver additional payloads. The vulnerability's exploitation potential was further amplified by the widespread use of ColdFusion in enterprise applications, where a single compromised form could potentially affect numerous users and sensitive data systems.
Mitigation strategies for CVE-2011-2463 require both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities. Organizations should immediately upgrade to Adobe ColdFusion versions 9.0.2 or later, which contain patches addressing this specific XSS vulnerability. Beyond the immediate upgrade, implementing comprehensive input validation and output encoding practices is essential for preventing similar issues in the future. This includes applying strict sanitization to all user-supplied data before processing, implementing proper HTML encoding for dynamic content, and establishing robust content security policies. Security teams should also deploy web application firewalls and implement proper security headers to provide additional layers of protection against XSS attacks. The vulnerability highlights the importance of maintaining up-to-date security practices and demonstrates how even well-established frameworks can contain fundamental flaws that require continuous monitoring and patch management. Organizations should also consider implementing automated security scanning tools that can detect similar input validation issues across their web applications, as the underlying principles of this vulnerability remain relevant to modern web application security practices. The incident serves as a critical reminder of the necessity for comprehensive security testing throughout the software development lifecycle and the importance of adhering to secure coding practices that prevent injection vulnerabilities in web applications.