Google Chrome and Chromium-based Browsers V8 Engine Type Confusion Remote Code Execution Vulnerability (CVE-2024-7971)
Executive & SecOps Summary
SECOPS ASSESSMENTGoogle Chrome prior to 128.0.6613.84 and all affected Chromium-based browsers (e.g., Microsoft Edge)
Remote attackers can trigger heap corruption and execute arbitrary code within the browser renderer process via a crafted HTML page
Immediately update all Chromium-based browsers to the latest stable release (Chrome 128.0.6613.84 or higher)
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
To upgrade Google Chrome on Linux-based endpoints (Ubuntu/Debian), execute the following commands in your terminal:
# Update package repositories and upgrade Google Chrome
sudo apt-get update && sudo apt-get --only-upgrade install google-chrome-stable -y
# Verify the installed version
google-chrome --version2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, enforce strict security policies to mitigate JIT-related exploitation. Below is a PowerShell command to enable Enhanced Security Mode in Microsoft Edge via Registry:
# Enable Strict Enhanced Security Mode in Microsoft Edge via Policy
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Edge' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Edge' -Name 'EnhanceSecurityMode' -Value 1 -PropertyType DWord -Force3. Log Audit & IoC Verification Commands
Use the following shell script to audit and identify vulnerable Chrome installations across your Linux infrastructure:
#!/bin/bash
# Audit script to detect vulnerable Chrome versions
if command -v google-chrome &> /dev/null; then
CURRENT_VER=$(google-chrome --version | awk '{print $3}')
REQUIRED_VER='128.0.6613.84'
# Compare versions
if [ '$(printf '%s\
%s' '$REQUIRED_VER' '$CURRENT_VER' | sort -V | head -n1)' = '$REQUIRED_VER' ]; then
echo '[SAFE] Chrome version ($CURRENT_VER) is secure.'
else
echo '[WARNING] Vulnerable Chrome version detected: $CURRENT_VER. Upgrade required!'
fi
else
echo '[INFO] Google Chrome is not installed.'
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2024-7971) is a critical Type Confusion (CWE-843) flaw within the V8 JavaScript and WebAssembly engine of Google Chrome and Chromium-based browsers. The root cause lies in V8's optimization pipeline, where the engine misinterprets the runtime type of a specific object. This type mismatch leads to out-of-bounds memory access, resulting in heap corruption.
2. Exploitation Mechanics & Attack Scenario
An attacker exploits this vulnerability by hosting a malicious, specially crafted HTML page containing complex JavaScript. When a victim visits the page, the JIT (Just-In-Time) compiler in V8 processes the script, triggering the type confusion. This allows the attacker to achieve arbitrary memory read/write primitives, leading to remote code execution (RCE) within the sandboxed renderer process. This zero-day has been actively exploited in the wild by advanced threat actors (such as Citrine Sleet).
3. Infrastructure & Business Impact
With a CVSS score of 9.6 and its inclusion in the CISA KEV catalog, this vulnerability poses an immediate threat to enterprise environments. While the initial execution is confined to the browser renderer, attackers frequently pair this with sandbox escape exploits to compromise the underlying operating system, potentially leading to full endpoint takeover, lateral movement, and data exfiltration.
Official Vendor Advisories & References
Type confusion in V8 in Google Chrome prior to 128.0.6613.84 allowed a remote attacker to exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Frequently Asked SecOps Questions (CVE-2024-7971)
FAQQ1. How critical is CVE-2024-7971 and is it actively exploited in the wild?
CVE-2024-7971 is rated CVSS 9.6 (CRITICAL) with a 30-day EPSS exploitation probability of 21.0%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2024-7971?
Primary impacted vendors include google, microsoft across chrome, edge, chromium. Scope summary: Google Chrome versions prior to 128.0.6613.84 (Windows, macOS, Linux) and other browsers utilizing the affected Chromium release cycle
Q3. What temporary mitigations or workarounds exist for CVE-2024-7971 before patching?
[Mitigation] Immediately update all Chromium-based browsers to the latest stable release (Chrome 128.0.6613.84 or higher) Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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