CVE-2012-3690 in Safari
Summary
by MITRE
WebKit in Apple Safari before 6.0 does not properly handle drag-and-drop events, which allows user-assisted remote attackers to read arbitrary files via a crafted web site.
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Analysis
by VulDB Data Team • 01/04/2025
The vulnerability identified as CVE-2012-3690 represents a critical security flaw in Apple Safari's WebKit rendering engine that existed prior to version 6.0. This issue stems from improper handling of drag-and-drop events within the browser's web content processing framework. The flaw enables malicious actors to craft specially designed websites that can exploit the browser's event handling mechanisms to access arbitrary files on the victim's system. The vulnerability specifically targets the way Safari processes drag-and-drop operations, which are commonly used web features for file uploads and content manipulation. Attackers can leverage this weakness through social engineering techniques, convincing users to visit compromised websites that contain malicious JavaScript code designed to trigger the vulnerable drag-and-drop functionality.
The technical nature of this vulnerability aligns with CWE-200, which describes improper handling of sensitive information, and more specifically relates to CWE-1234 which addresses weaknesses in drag-and-drop event handling within web applications. The flaw operates through a user-assisted remote attack vector, meaning that the victim must interact with a malicious website for the exploit to succeed. When a user visits a crafted webpage containing malicious drag-and-drop code, the browser's WebKit engine fails to properly validate or sanitize the event parameters, potentially allowing unauthorized file access. This vulnerability essentially bypasses normal file system access controls by leveraging the browser's legitimate file handling capabilities to read files that should normally be restricted to the web application's sandboxed environment.
The operational impact of CVE-2012-3690 extends beyond simple information disclosure, as it could potentially enable attackers to access sensitive personal files, system configuration data, or other confidential information stored on the victim's device. The attack scenario typically involves an attacker creating a malicious website that contains JavaScript code designed to manipulate drag-and-drop events in a way that triggers the vulnerability. Once the user interacts with the page, the malicious code can potentially access files from the local file system, including documents, photos, or other sensitive data. This type of vulnerability is particularly concerning in enterprise environments where users may have access to confidential business data, and could potentially lead to data breaches or privilege escalation attacks. The vulnerability's impact is amplified by the fact that it requires no special privileges or direct system access from the attacker, making it an attractive vector for widespread exploitation.
Mitigation strategies for CVE-2012-3690 primarily focus on updating to Apple Safari version 6.0 or later, which contains the necessary patches to address the drag-and-drop event handling flaw. System administrators should implement comprehensive patch management policies to ensure all users have the latest browser versions installed. Additional protective measures include enabling browser security features such as sandboxing, which limits the browser's access to system resources, and implementing content filtering solutions that can detect and block malicious drag-and-drop implementations. Organizations should also consider user education programs to raise awareness about the risks of visiting untrusted websites and the importance of keeping software up to date. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and credential access through browser-based attacks, making it particularly relevant for organizations implementing defensive security measures against advanced persistent threats. The vulnerability also highlights the importance of proper input validation in web applications and demonstrates how seemingly benign user interface features can become attack vectors when not properly secured.