CVE-2023-5853 in Chrome
Summary
by MITRE • 11/01/2023
Incorrect security UI in Downloads in Google Chrome prior to 119.0.6045.105 allowed a remote attacker to obfuscate security UI via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 11/29/2023
The vulnerability identified as CVE-2023-5853 represents a significant concern in web browser security, specifically within Google Chrome's handling of download notifications and security user interfaces. This flaw existed in versions prior to 119.0.6045.105 and allowed malicious actors to manipulate the visual presentation of download security warnings through carefully crafted html pages. The issue stems from how Chrome renders security UI elements during download operations, creating an opportunity for attackers to obscure or misrepresent critical security information that users would normally see when downloading files from the internet. The vulnerability's classification as medium severity by Chromium security team indicates that while it does not directly enable arbitrary code execution or complete system compromise, it significantly undermines user trust and security awareness mechanisms that are fundamental to safe browsing practices.
The technical implementation of this vulnerability involves the manipulation of html content that triggers download operations within the browser environment. Attackers can craft malicious web pages that, when loaded, cause the browser to display download notifications with altered visual properties that hide or obfuscate security warnings. This typically occurs through manipulation of css styling, html structure, or javascript behaviors that control how download progress indicators and security alerts are presented to users. The flaw specifically targets the user interface components responsible for displaying download status information, potentially allowing malicious actors to make dangerous downloads appear benign or to hide warning messages that would normally alert users to potentially harmful files. This represents a failure in the browser's security UI implementation that violates fundamental principles of user interface security design where critical warnings must remain visible and unobstructed.
The operational impact of CVE-2023-5853 extends beyond simple visual deception to potentially enable more serious attack vectors including phishing attempts, malware distribution, and social engineering campaigns. When users cannot properly see download security warnings, they become more susceptible to inadvertently downloading malicious files that could compromise their systems or steal sensitive information. The vulnerability particularly affects users who rely on browser security warnings as their primary defense mechanism against potentially harmful downloads, essentially creating a false sense of security while the actual download process proceeds without proper user awareness. This type of vulnerability aligns with attack patterns described in the attack tree framework where user interface manipulation serves as a precursor to more sophisticated attacks, and it corresponds to CWE-602 client-side cross-site scripting vulnerabilities where the application trust model is compromised through UI manipulation rather than direct code execution.
Mitigation strategies for CVE-2023-5853 primarily involve updating to Chrome version 119.0.6045.105 or later, which contains the necessary security patches to prevent the obfuscation of download UI elements. Organizations should implement comprehensive browser update policies that ensure all systems receive security patches promptly, particularly for high-risk vulnerabilities that affect user interface security. Additional defensive measures include implementing web content filtering solutions that can detect and block malicious html content that attempts to manipulate browser UI elements, as well as user education programs that emphasize the importance of verifying download sources and paying attention to security warnings regardless of their visual presentation. The vulnerability also highlights the need for regular security audits of browser security UI implementations and adherence to security design principles that ensure critical warnings remain visible and accessible to users. Organizations should consider implementing browser security monitoring solutions that can detect anomalous UI behavior patterns and alert security teams to potential manipulation attempts. This vulnerability demonstrates the importance of maintaining security through defense in depth approaches where multiple layers of protection work together to prevent user interface manipulation attacks that could otherwise bypass traditional security controls.