CVE-2008-4196 in Web Browser
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Opera before 9.52 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 08/20/2019
The CVE-2008-4196 vulnerability represents a critical cross-site scripting flaw discovered in Opera web browsers prior to version 9.52. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws. The vulnerability allows remote attackers to inject malicious scripts into web pages viewed by other users, creating a significant threat to web application security and user privacy. The unspecified vectors in the original description indicate that the attack could potentially occur through multiple entry points within the browser's rendering or input processing mechanisms.
The technical nature of this vulnerability stems from inadequate input validation and output encoding within Opera's browser engine. When users encounter web content containing malicious scripts, the browser fails to properly sanitize or escape the input before rendering it to the user interface. This allows attackers to craft specially designed web pages or manipulate existing websites to inject script code that executes in the context of other users' browsing sessions. The vulnerability specifically affects the browser's handling of user-supplied data, where the lack of proper sanitization creates an environment where attacker-controlled content can be executed as legitimate browser code.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to perform session hijacking, steal cookies, redirect users to malicious sites, and potentially execute more sophisticated attacks such as credential theft or data exfiltration. Users who browse compromised websites or click on malicious links could have their browser sessions compromised without their knowledge. The vulnerability is particularly dangerous because it affects the browser's core rendering engine, meaning that successful exploitation could occur simply by visiting a malicious website, making it a high-risk threat for all users of affected Opera versions. This type of vulnerability directly impacts the browser's security model and user trust in the application's ability to protect against malicious web content.
Mitigation strategies for CVE-2008-4196 primarily involve upgrading to Opera version 9.52 or later, which includes proper input validation and output encoding mechanisms. Security administrators should implement comprehensive browser security policies and regularly update all browser installations to prevent exploitation. Additional protective measures include implementing content security policies, using web application firewalls, and educating users about the risks of visiting untrusted websites. The vulnerability demonstrates the importance of proper input validation techniques and the necessity of following secure coding practices, particularly in web browsers where user input is processed in real-time. Organizations should also consider deploying browser security extensions and monitoring for suspicious script execution patterns that might indicate exploitation attempts. The incident underscores the critical need for regular security updates and the implementation of defense-in-depth strategies to protect against browser-based attacks, aligning with the principles outlined in the ATT&CK framework for web browser exploitation techniques.