CVE-2023-5858 Overview
CVE-2023-5858 is a security UI obfuscation vulnerability in the WebApp Provider component of Google Chrome. An inappropriate implementation flaw allows remote attackers to obfuscate security UI elements via a crafted HTML page, potentially misleading users about the security state of their browsing session. This vulnerability is classified as CWE-346 (Origin Validation Error), indicating that the browser fails to properly validate the origin of requests in certain WebApp Provider scenarios.
Critical Impact
Remote attackers can leverage crafted HTML pages to obfuscate Chrome's security UI, potentially deceiving users about the legitimacy or security status of web content and enabling social engineering attacks.
Affected Products
- Google Chrome versions prior to 119.0.6045.105
- Debian Linux 11.0 and 12.0 (via bundled Chromium packages)
- Fedora 37, 38, and 39 (via bundled Chromium packages)
Discovery Timeline
- November 1, 2023 - CVE-2023-5858 published to NVD
- June 12, 2025 - Last updated in NVD database
Technical Details for CVE-2023-5858
Vulnerability Analysis
The vulnerability exists within Google Chrome's WebApp Provider component, which handles the integration and presentation of Progressive Web Apps (PWAs) and other web applications within the browser environment. The inappropriate implementation allows malicious web pages to manipulate how security indicators are displayed to users.
This type of vulnerability falls under UI spoofing or security UI obfuscation, where the browser's visual security cues can be hidden, altered, or made confusing through specially crafted content. Attackers exploiting this flaw could potentially create scenarios where users believe they are interacting with legitimate, secure content when they are not.
The attack requires user interaction—specifically, the victim must navigate to a malicious web page containing the crafted HTML content. While this limits the attack surface, it remains a viable vector for phishing campaigns and social engineering attacks where users are lured to attacker-controlled websites.
Root Cause
The root cause is an Origin Validation Error (CWE-346) in the WebApp Provider's handling of security UI elements. The component fails to properly enforce origin-based restrictions when rendering security indicators, allowing cross-origin content to influence how security information is presented to users. This implementation gap enables attackers to craft HTML that manipulates the browser's trust indicators.
Attack Vector
The attack is network-based and requires user interaction. An attacker hosts a malicious web page containing specially crafted HTML designed to exploit the WebApp Provider's improper implementation. When a victim visits this page, the crafted content causes Chrome's security UI elements to be obfuscated or displayed in a misleading manner.
This could be leveraged in phishing scenarios where attackers attempt to make malicious sites appear trustworthy, or to hide security warnings that would normally alert users to potential threats. The attack does not require any special privileges and can be executed against any user running a vulnerable version of Chrome.
Detection Methods for CVE-2023-5858
Indicators of Compromise
- Unusual rendering behavior of browser security indicators on specific websites
- User reports of missing or inconsistent security UI elements (padlock icons, certificate information)
- Web pages that attempt to create full-screen overlays or manipulate browser chrome areas
- Suspicious redirects to pages exhibiting UI anomalies
Detection Strategies
- Monitor for web pages with excessive iframe nesting or suspicious DOM manipulation patterns
- Implement browser telemetry to detect abnormal WebApp Provider behavior
- Deploy endpoint detection rules for known HTML patterns associated with UI spoofing attacks
- Review browser logs for WebApp Provider-related errors or warnings
Monitoring Recommendations
- Enable enhanced security logging in enterprise Chrome deployments
- Monitor user-reported phishing incidents for patterns involving UI manipulation
- Track visits to newly registered domains exhibiting suspicious behavior
- Implement network-level inspection for known malicious HTML patterns targeting this vulnerability
How to Mitigate CVE-2023-5858
Immediate Actions Required
- Update Google Chrome to version 119.0.6045.105 or later immediately
- Verify Chromium-based browsers on Linux distributions are updated via package managers
- Educate users about verifying site authenticity through URL inspection rather than visual indicators alone
- Consider implementing browser isolation for high-risk users during the patching window
Patch Information
Google has addressed this vulnerability in Chrome version 119.0.6045.105, released on October 31, 2023. The fix is documented in the Google Chrome Stable Channel Update. Additional details about the specific bug can be found in Chrome Bug Report #1457704.
Linux distribution users should apply the following security updates:
- Debian: DSA-5546 Security Advisory
- Fedora: Updates available via Fedora Package Announcements
- Gentoo: GLSA 202311-11, GLSA 202312-07, and GLSA 202401-34
Workarounds
- Enable Chrome's Enhanced Safe Browsing mode for additional protection against malicious sites
- Implement organizational policies to restrict access to untrusted websites
- Train users to verify SSL certificates through the address bar rather than relying solely on visual indicators
- Consider using browser extensions that provide additional URL verification capabilities
# Verify Chrome version on Linux
google-chrome --version
# Expected output: Google Chrome 119.0.6045.105 or later
# Update Chrome on Debian/Ubuntu
sudo apt update && sudo apt upgrade chromium
# Update Chrome on Fedora
sudo dnf update chromium
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
