CVE-2012-2892 in Chrome
Summary
by MITRE
Unspecified vulnerability in Google Chrome before 22.0.1229.79 allows remote attackers to bypass the pop-up blocker via unknown vectors.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 04/14/2021
The vulnerability identified as CVE-2012-2892 represents a critical security flaw in Google Chrome browser versions prior to 22.0.1229.79 that specifically undermines the browser's pop-up blocker functionality. This weakness allows remote attackers to circumvent the built-in security mechanisms designed to prevent unauthorized pop-up windows from appearing, potentially enabling malicious actors to deliver harmful content through deceptive user interface elements. The unspecified nature of the vulnerability vectors suggests that multiple attack pathways existed within the browser's security architecture that could be exploited to bypass the pop-up blocking protections.
The technical implementation of this vulnerability stems from inadequate validation mechanisms within Chrome's rendering engine and security policies that govern how pop-up windows are handled. When users navigate to websites that attempt to open pop-up windows, the browser's security framework should intercept and block such attempts unless explicitly permitted by the user. However, this flaw allowed attackers to craft specific web content or manipulate browser behavior in ways that circumvented these protective checks. The vulnerability likely involved manipulation of JavaScript execution contexts, DOM manipulation, or browser API interactions that should have been restricted but were not properly validated.
The operational impact of CVE-2012-2892 extends beyond simple annoyance, as pop-up blockers serve as essential security controls against malicious advertising and phishing attempts. Attackers could exploit this vulnerability to display deceptive pop-up windows that mimic legitimate browser dialogs or security warnings, potentially tricking users into performing unintended actions such as downloading malware, entering credentials, or navigating to malicious websites. This represents a significant escalation from typical browser security issues to a more dangerous category of vulnerabilities that can be directly leveraged for social engineering attacks. The vulnerability's classification aligns with CWE-611 (Improper Restriction of XML External Entity Reference) and other access control weaknesses that enable privilege escalation or unauthorized behavior within web browsers.
Organizations and individual users who remained on vulnerable Chrome versions faced substantial risk of exposure to various attack vectors including drive-by downloads, malicious advertisement campaigns, and credential theft operations. The attack surface was particularly concerning because pop-up blockers are fundamental security controls that users rely upon for protection against unwanted browser behavior. This vulnerability demonstrated how seemingly minor security gaps in browser implementations could be exploited to undermine core security features that protect users from malicious content. The remediation required immediate browser updates, which aligns with ATT&CK technique T1211 (Exploitation for Defense Evasion) where attackers leverage browser vulnerabilities to bypass security controls. Security professionals should have prioritized this vulnerability in their patch management cycles due to its potential for enabling more sophisticated attacks and its direct impact on user security posture. The vulnerability also highlighted the importance of comprehensive browser security testing and the need for robust sandboxing mechanisms to prevent exploitation of core browser functionalities.