CVE-2022-33680: Microsoft Edge Privilege Escalation Flaw

CVE-2022-33680 Overview

CVE-2022-33680 is an Elevation of Privilege vulnerability affecting Microsoft Edge (Chromium-based). This vulnerability allows attackers to escalate privileges within the browser context, potentially gaining elevated access beyond the intended security boundaries. The attack requires network access and user interaction, but successful exploitation can result in a significant security impact affecting confidentiality, integrity, and availability across security boundaries.

Critical Impact

Successful exploitation enables attackers to elevate privileges in Microsoft Edge, potentially compromising sensitive user data, manipulating browser behavior, and affecting systems beyond the original security scope.

Affected Products

• Microsoft Edge (Chromium-based)

Discovery Timeline

• 2022-07-07 - CVE-2022-33680 published to NVD
• 2025-01-02 - Last updated in NVD database

Technical Details for CVE-2022-33680

Vulnerability Analysis

This Elevation of Privilege vulnerability in Microsoft Edge (Chromium-based) allows an attacker to gain elevated privileges within the browser environment. The vulnerability requires a network-based attack vector with high complexity, meaning specific conditions must be met for successful exploitation. User interaction is required, typically involving a user visiting a malicious website or clicking on a specially crafted link.

The impact of this vulnerability is severe because it affects resources beyond the vulnerable component's security scope (changed scope). Successful exploitation can lead to high impact on confidentiality, integrity, and availability, meaning attackers could access sensitive information, modify browser behavior or data, and potentially disrupt browser functionality.

Root Cause

Microsoft has not disclosed the specific root cause details for this vulnerability, classifying it under "NVD-CWE-noinfo." This indicates the weakness type was not provided in the official advisory. Elevation of privilege vulnerabilities in browser contexts typically stem from improper access control, sandbox escape mechanisms, or flaws in permission validation that allow processes to exceed their intended privilege levels.

Attack Vector

The attack vector for CVE-2022-33680 is network-based, requiring high attack complexity and user interaction. An attacker would need to craft a malicious webpage or content that, when accessed by a victim using a vulnerable version of Microsoft Edge, triggers the privilege escalation.

The attack scenario typically involves:

1. Attacker creates malicious web content designed to exploit the vulnerability
2. Victim navigates to or is redirected to the malicious content using Microsoft Edge
3. Upon user interaction with the content, the vulnerability is triggered
4. The attacker gains elevated privileges within the browser context
5. Due to the changed scope, the attacker may impact resources beyond the browser's normal security boundaries

Given the high complexity requirement, specific conditions such as particular browser configurations, timing factors, or additional prerequisites may be necessary for successful exploitation.

Detection Methods for CVE-2022-33680

Indicators of Compromise

• Unusual privilege escalation events originating from the Microsoft Edge browser process
• Unexpected child processes spawned by msedge.exe with elevated privileges
• Anomalous network connections initiated by Edge browser processes to suspicious destinations
• Browser crash dumps or error logs indicating exploitation attempts

Detection Strategies

• Monitor Microsoft Edge process behavior for privilege escalation patterns using endpoint detection tools
• Implement browser version tracking to identify unpatched Edge installations across the enterprise
• Deploy network monitoring to detect suspicious traffic patterns associated with browser-based attacks
• Enable Windows Security Event logging for privilege escalation attempts (Event ID 4672, 4673)

Monitoring Recommendations

• Configure SentinelOne agents to monitor Edge browser processes for suspicious behavior patterns
• Establish baseline browser behavior metrics to identify anomalous activity
• Implement real-time alerting for privilege escalation attempts in browser contexts
• Regularly audit deployed Edge versions against known vulnerable versions

How to Mitigate CVE-2022-33680

Immediate Actions Required

• Update Microsoft Edge (Chromium-based) to the latest patched version immediately
• Verify all enterprise endpoints are running updated Edge versions through automated inventory
• Consider temporary restrictions on browsing untrusted websites until patches are deployed
• Enable automatic updates for Microsoft Edge to receive security fixes promptly

Patch Information

Microsoft has released security updates to address CVE-2022-33680. Organizations should apply the latest Microsoft Edge updates through their standard patch management processes. Detailed patch information and affected version specifics are available in the Microsoft Security Advisory for CVE-2022-33680 and the Microsoft Update Guide.

Workarounds

• Restrict user access to untrusted websites through web filtering proxies until patches can be applied
• Consider using alternative browsers for sensitive operations while awaiting patch deployment
• Implement network segmentation to limit the potential impact of successful exploitation
• Enable Microsoft Defender SmartScreen to provide additional protection against malicious websites

# Verify Microsoft Edge version via PowerShell
Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Edge\BLBeacon' | Select-Object version

# Force Edge update check via command line
start msedge://settings/help

# Configure automatic updates via Group Policy
# Navigate to: Computer Configuration > Administrative Templates > Microsoft Edge Update > Applications > Microsoft Edge
# Set "Update policy override" to "Always allow updates"