CVE-2024-38083: Microsoft Edge Chromium Spoofing Vulnerability

CVE-2024-38083 Overview

CVE-2024-38083 is a spoofing vulnerability in Microsoft Edge (Chromium-based) on iOS. The flaw allows an attacker to present misleading information to the user through the browser interface, potentially aiding phishing or user-interface confusion attacks. Exploitation requires user interaction and can be triggered over the network. Microsoft assigned the weakness to [CWE-449: The UI Performs the Wrong Action], indicating the browser executes an action that differs from what the user perceives. Microsoft addressed the issue through its Security Update Guide.

Critical Impact
Successful exploitation enables spoofing of trusted browser UI elements, which attackers can leverage to deceive users into disclosing credentials or interacting with malicious content.

Affected Products

Microsoft Edge (Chromium-based) for iOS
Mobile Edge builds prior to the fixed version referenced in Microsoft's advisory
Deployments distributing Edge for iPhone/iPad through enterprise MDM

Discovery Timeline

2024-06-13 - CVE-2024-38083 published to NVD
2026-07-20 - Last updated in NVD database

Technical Details for CVE-2024-38083

Vulnerability Analysis

The vulnerability affects Microsoft Edge (Chromium-based) running on iOS. It falls under [CWE-449], where the user interface performs an action that does not match the user's expectation. In a browser context, this typically manifests as address bar spoofing, security indicator manipulation, or origin confusion in rendered content. An attacker who convinces a user to visit a crafted page can present content that appears to originate from a trusted domain. The impact is limited to integrity of displayed information, with no direct effect on confidentiality or availability of the underlying system.

Root Cause

The root cause is inconsistent handling of UI state between the browser chrome and the loaded web content on the iOS build of Edge. When specific navigation or rendering sequences occur, the browser displays UI elements that do not accurately reflect the underlying resource origin. Microsoft's advisory documents the fix but does not publicly disclose the exact code path.

Attack Vector

An attacker hosts a malicious page and lures a target running the vulnerable Edge for iOS build to visit it. The page triggers the UI inconsistency, causing the browser to display attacker-controlled content alongside spoofed indicators such as a trusted URL or security context. The victim, believing the content is legitimate, may submit credentials, download files, or approve prompts. No authentication is required and exploitation depends on user interaction with the crafted content.

No public proof-of-concept code is available. Refer to the Microsoft Security Update Guide CVE-2024-38083 for vendor-supplied technical details.

Detection Methods for CVE-2024-38083

Indicators of Compromise

Mobile device telemetry showing Edge for iOS navigations to newly registered or low-reputation domains followed by credential submission events.
Phishing reports from users describing legitimate-looking Microsoft, banking, or corporate login pages viewed in Edge on iPhone or iPad.
Corporate proxy logs recording Edge mobile user-agents visiting domains flagged by threat intelligence as spoofing infrastructure.

Detection Strategies

Correlate mobile browser navigation logs with URL reputation feeds to identify sessions where users interacted with suspected spoofing pages.
Inspect enterprise MDM inventory for iOS devices running Edge versions predating Microsoft's patch for CVE-2024-38083.
Monitor identity provider sign-in logs for authentication attempts from iOS Edge sessions immediately following visits to untrusted domains.

Monitoring Recommendations

Enable web filtering and phishing protection on mobile endpoints to block known spoofing and credential-harvesting domains.
Track Edge for iOS version compliance across the mobile fleet and alert when unpatched builds re-enroll.
Review anomalous authentication events, such as sign-ins from mobile devices shortly after user-reported suspicious browser behavior.

How to Mitigate CVE-2024-38083

Immediate Actions Required

Update Microsoft Edge for iOS to the latest version available from the Apple App Store on all managed and personal devices.
Push the update through mobile device management (MDM) policies to enforce compliance across the enterprise fleet.
Reinforce user awareness training on verifying URLs and security indicators on mobile browsers, where screen real estate limits visibility.

Patch Information

Microsoft addressed CVE-2024-38083 in an Edge for iOS update referenced in the Microsoft Security Update Guide. Administrators should confirm devices are running the fixed version and re-verify after any App Store rollback or reinstallation.

Workarounds

Restrict mobile browser usage for sensitive workflows and require authentication through managed corporate applications instead.
Deploy DNS filtering or secure web gateway protections to mobile devices to block access to known phishing infrastructure.
Enforce phishing-resistant multifactor authentication so spoofed login pages cannot yield reusable credentials.

bash

# Example MDM compliance check (conceptual)
# Query installed Edge version on enrolled iOS devices and flag outdated builds
mdm-cli devices list --app com.microsoft.msedge --os ios \
  --filter 'app.version < FIXED_VERSION' \
  --action notify-admin