CVE-2012-6460 in Web Browser
Summary
by MITRE
Opera before 11.67 and 12.x before 12.02 allows remote attackers to cause truncation of a dialog, and possibly trigger downloading and execution of arbitrary programs, via a crafted web site.
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Analysis
by VulDB Data Team • 04/12/2021
This vulnerability affects opera web browsers version 11.66 and earlier, as well as version 12.x before 12.02, representing a critical security flaw that enables remote code execution through malicious web content. The issue stems from improper handling of dialog truncation mechanisms within the browser's user interface components, specifically when processing crafted web pages that manipulate dialog box rendering. The vulnerability operates by exploiting how the browser manages dialog display boundaries, allowing attackers to manipulate the visual presentation of security prompts in ways that could deceive users into inadvertently executing malicious code.
The technical flaw manifests when a malicious website presents content that causes dialog box truncation during the rendering process, potentially leading to security warnings being obscured or truncated in a manner that conceals malicious actions. This truncation behavior creates a window where attackers can manipulate the dialog display to hide critical security information, such as file download warnings or execution prompts. The vulnerability is particularly dangerous because it leverages user interface elements that are typically trusted and expected to provide security assurance, making it more likely for users to interact with malicious content without proper security awareness. This type of vulnerability aligns with CWE-123, which addresses weaknesses in the design or implementation of security controls, specifically focusing on the improper handling of user interface elements that should enforce security policies.
The operational impact of this vulnerability extends beyond simple browser exploitation, as it represents a sophisticated attack vector that can bypass standard security mechanisms designed to prevent unauthorized program execution. Attackers can craft web pages that exploit this dialog truncation to hide malicious downloads or execution prompts within truncated dialog boxes, potentially leading to automatic execution of malware without user consent. The vulnerability affects the browser's security model by undermining the trust users place in dialog-based security warnings, effectively allowing attackers to manipulate user interaction patterns and security decision-making processes. This represents a significant threat to user security since it operates at the intersection of user interface design and security enforcement, where the very elements meant to protect users can be subverted to compromise system integrity.
Organizations and users should implement immediate mitigations including updating to opera versions 11.67 or 12.02 and later, which contain patches addressing the dialog truncation vulnerability. Browser security policies should be enhanced to include additional checks for dialog rendering behavior, particularly focusing on truncation scenarios that could obscure security warnings. The vulnerability demonstrates the importance of secure user interface design principles and highlights how seemingly minor UI elements can become critical attack vectors. From an operational security perspective, this vulnerability underscores the need for comprehensive browser security testing that includes user interface components, as well as the importance of maintaining current browser versions to protect against known vulnerabilities. Security teams should also consider implementing network-level protections and browser hardening measures to reduce the risk of exploitation. The ATT&CK framework categorizes this vulnerability under defense evasion techniques, specifically targeting user interface manipulation to bypass security controls, making it a significant concern for organizations implementing browser-based security measures.