CVE-2020-6437 in Chrome
Summary
by MITRE
Inappropriate implementation in WebView in Google Chrome prior to 81.0.4044.92 allowed a remote attacker to spoof security UI via a crafted application.
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Analysis
by VulDB Data Team • 05/09/2025
The vulnerability identified as CVE-2020-6437 represents a critical flaw in Google Chrome's WebView component that existed prior to version 81.0.4044.92. This issue stems from an inappropriate implementation that undermines the browser's security model and user interface protection mechanisms. The vulnerability specifically affects applications that utilize Chrome's WebView for rendering web content, creating a potential attack surface where malicious actors can manipulate security warnings and user interface elements. The flaw manifests when a crafted application exploits the WebView's handling of security-related UI components, potentially leading to deceptive user experiences that could fool even security-conscious users into trusting malicious content.
The technical nature of this vulnerability resides in the WebView's improper handling of security UI elements, which violates fundamental security principles that should prevent such manipulation. According to CWE classification, this represents a weakness in the security model where the system fails to properly validate or enforce security boundaries. The flaw allows remote attackers to bypass the normal security prompts that users typically rely upon for protection against potentially dangerous web content. This manipulation occurs at the interface level where security warnings, certificate information, and other protective UI elements become unreliable indicators of actual security status. The vulnerability essentially creates a false sense of security by enabling attackers to craft web content that appears legitimate while actually containing malicious elements.
The operational impact of CVE-2020-6437 extends beyond simple user deception to potentially enable more serious attacks such as phishing, credential theft, and malware delivery. When users encounter spoofed security UI elements, they may unknowingly interact with malicious content that would otherwise be blocked or clearly identified as dangerous. This vulnerability affects applications that depend on WebView for web content rendering, including mobile applications, desktop applications, and enterprise software that integrates Chrome's web capabilities. The attack vector requires remote exploitation through a crafted application, meaning that malicious actors can leverage this flaw without requiring local system access or physical presence. This remote capability significantly increases the potential attack surface and makes the vulnerability particularly dangerous in environments where users encounter untrusted web content.
Mitigation strategies for CVE-2020-6437 center around immediate software updates to versions 81.0.4044.92 and later, which contain the necessary patches to address the WebView security implementation flaw. Organizations should implement comprehensive patch management processes to ensure all affected applications are updated promptly. Additionally, security teams should monitor for applications that utilize WebView components and verify their compliance with security updates. The vulnerability demonstrates the importance of maintaining up-to-date web rendering components and highlights the need for robust security testing of UI elements that users rely upon for protection. From an ATT&CK framework perspective, this vulnerability aligns with techniques involving social engineering and credential access, as attackers can exploit user trust in security warnings to gain unauthorized access to systems or information. Security professionals should also consider implementing additional layers of protection such as network monitoring and user behavior analytics to detect potential exploitation attempts.