CVE-2024-43472 Overview
CVE-2024-43472 is an elevation of privilege vulnerability affecting Microsoft Edge (Chromium-based). Microsoft classifies the issue as high severity with a CVSS 3.1 base score of 8.3. The underlying weakness is tracked as [CWE-416] Use After Free, which involves referencing memory after it has been released.
Exploitation requires user interaction over the network and results in a scope change, allowing an attacker to affect resources beyond the vulnerable component. Successful exploitation impacts confidentiality, integrity, and availability. Microsoft has released an update through the Microsoft Security Response Center.
Critical Impact
An attacker who successfully exploits CVE-2024-43472 can elevate privileges from the browser sandbox and compromise resources outside the affected Edge process.
Affected Products
- Microsoft Edge (Chromium-based)
- Versions prior to the August 2024 security update
- All platforms where Edge Chromium is supported
Discovery Timeline
- 2024-08-16 - CVE-2024-43472 published to NVD
- 2024-08-28 - Last updated in NVD database
Technical Details for CVE-2024-43472
Vulnerability Analysis
The vulnerability is a Use After Free condition in Microsoft Edge Chromium. The defect allows a remote attacker to trigger elevation of privilege when a user interacts with attacker-controlled web content. Because the CVSS vector indicates a scope change, exploitation breaks the security boundary between the browser process and the host environment.
Microsoft categorizes the flaw as an elevation of privilege issue rather than remote code execution. The attack complexity is high, meaning the attacker must win a race condition or satisfy specific runtime preconditions to reliably trigger the freed-object reuse. No public proof-of-concept has been released, and the EPSS probability remains low.
Root Cause
Use After Free defects occur when a program continues to use a pointer after the underlying memory has been freed. In Chromium-based browsers, these conditions frequently arise from object lifetime mismatches between renderer components, IPC handlers, or extension subsystems. Microsoft has not disclosed the specific component responsible.
Attack Vector
The attacker delivers crafted web content that the victim must load in a vulnerable Edge build. User interaction is required, which typically means visiting a malicious page or clicking a hostile link. Once triggered, the freed object reuse allows the attacker to corrupt internal state and escape the affected process boundary, achieving elevated privileges outside the original execution context.
No verified public exploitation code is available. Refer to the Microsoft CVE-2024-43472 advisory for vendor technical details.
Detection Methods for CVE-2024-43472
Indicators of Compromise
- Unexpected child processes spawned by msedge.exe outside normal browser worker patterns
- Edge crash dumps referencing freed objects, heap corruption, or access violations during web content rendering
- Outbound connections from Edge processes to recently registered or low-reputation domains preceding crashes
Detection Strategies
- Inventory Edge Chromium versions across the fleet and flag endpoints running builds released before the August 2024 cumulative update
- Monitor for anomalous process injection or token manipulation activity originating from msedge.exe
- Correlate browser crash telemetry with subsequent privilege-sensitive actions on the same host within a short time window
Monitoring Recommendations
- Forward Edge crash and Windows Error Reporting events to a centralized analytics platform for review
- Track Application and Security event logs for new service installations or scheduled tasks created shortly after browser sessions
- Alert on Edge processes attempting to access LSASS, credential stores, or other sensitive system resources
How to Mitigate CVE-2024-43472
Immediate Actions Required
- Apply the Microsoft Edge security update referenced in the MSRC advisory to all managed endpoints
- Confirm Edge automatic updates are enabled and not blocked by network policies or group policy objects
- Restrict browsing to trusted sites on unpatched endpoints until the update is deployed
Patch Information
Microsoft published the fix through the standard Edge Stable channel. Administrators should verify the installed version against the build listed in the Microsoft CVE-2024-43472 advisory and force update where required.
Workarounds
- Enforce Microsoft Defender SmartScreen and site isolation policies through group policy to reduce exposure to malicious content
- Deploy web filtering to block known malicious domains and newly registered domains for high-risk user groups
- Educate users to avoid clicking unsolicited links and to report unexpected browser crashes to the security team
# Verify installed Edge version on Windows endpoints
(Get-Item "$env:ProgramFiles (x86)\Microsoft\Edge\Application\msedge.exe").VersionInfo.ProductVersion
# Force Edge update via policy registry key
reg add "HKLM\SOFTWARE\Policies\Microsoft\EdgeUpdate" /v UpdateDefault /t REG_DWORD /d 1 /f
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
