CVE-2020-6572 Overview
CVE-2020-6572 is a use-after-free vulnerability in the Media component of Google Chrome prior to version 81.0.4044.92. This memory corruption flaw allows a remote attacker to execute arbitrary code on a victim's system by convincing them to visit a specially crafted HTML page. The vulnerability stems from improper memory management within Chrome's media handling functionality.
Critical Impact
This vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation in the wild. Remote code execution can lead to complete system compromise, data theft, and lateral movement within networks.
Affected Products
- Google Chrome versions prior to 81.0.4044.92
- All platforms running vulnerable Chrome versions (Windows, macOS, Linux)
- Chromium-based browsers using affected code
Discovery Timeline
- 2021-01-14 - CVE-2020-6572 published to NVD
- 2026-01-13 - Last updated in NVD database
Technical Details for CVE-2020-6572
Vulnerability Analysis
This use-after-free vulnerability (CWE-416) exists in the Media component of Google Chrome. Use-after-free vulnerabilities occur when a program continues to reference memory after it has been freed, potentially allowing an attacker to manipulate the freed memory region. In this case, the flaw resides in how Chrome handles media objects, where improper lifecycle management leads to a condition where memory is accessed after being deallocated.
The vulnerability requires user interaction, specifically visiting a malicious webpage containing a crafted HTML page designed to trigger the memory corruption condition. Upon successful exploitation, an attacker gains the ability to execute arbitrary code within the context of the browser process, potentially leading to sandbox escape and full system compromise.
Root Cause
The root cause of CVE-2020-6572 lies in improper memory lifecycle management within Chrome's Media component. When media objects are created and destroyed during page rendering or media playback operations, a race condition or logic error allows references to previously freed memory to persist. Subsequent operations on these dangling pointers enable attackers to corrupt memory and hijack program execution flow.
Attack Vector
The attack vector is network-based, requiring the victim to navigate to a malicious webpage. The attacker hosts or injects a crafted HTML page containing malicious media elements designed to trigger the use-after-free condition. The exploitation workflow typically involves:
- Victim visits attacker-controlled or compromised website
- Malicious HTML/JavaScript triggers specific media operations
- Memory corruption occurs through the use-after-free condition
- Attacker-controlled data overwrites freed memory
- Code execution is achieved when corrupted memory is accessed
The attack requires no special privileges or authentication, making it accessible to any attacker capable of luring victims to malicious content.
Detection Methods for CVE-2020-6572
Indicators of Compromise
- Unusual Chrome process crashes or memory access violations in logs
- Unexpected child process spawning from Chrome renderer processes
- Network connections to suspicious domains during media content loading
- Chrome crash dumps indicating memory corruption in media-related functions
Detection Strategies
- Monitor for Chrome crash reports containing media component stack traces
- Implement endpoint detection rules for unusual process behavior following Chrome execution
- Deploy network monitoring to identify connections to known malicious infrastructure
- Enable Chrome's built-in crash reporting to capture exploitation attempts
Monitoring Recommendations
- Configure SentinelOne to monitor for suspicious process chains originating from Chrome
- Enable browser crash log collection and analysis for memory corruption indicators
- Monitor for post-exploitation behaviors such as credential access or lateral movement
- Track Chrome version deployment across endpoints to identify unpatched systems
How to Mitigate CVE-2020-6572
Immediate Actions Required
- Update Google Chrome to version 81.0.4044.92 or later immediately
- Enable automatic Chrome updates to ensure timely security patches
- Audit enterprise environments for outdated Chrome installations
- Consider temporary browser isolation for high-risk users until patching is complete
Patch Information
Google addressed this vulnerability in the Chrome 81 stable channel update released on April 7, 2020. The fix resolves the improper memory management in the Media component. Organizations should ensure all Chrome installations are updated to version 81.0.4044.92 or later. For detailed patch information, refer to the Google Chrome Stable Update announcement and the Chromium Bug Report #1066893.
Given this vulnerability's inclusion in the CISA Known Exploited Vulnerabilities catalog, organizations subject to CISA directives must prioritize remediation according to established timelines.
Workarounds
- Deploy browser isolation solutions to contain potential exploitation attempts
- Implement content security policies restricting media loading from untrusted sources
- Use enterprise browser management to enforce Chrome update compliance
- Consider disabling unnecessary media features in high-security environments until patching is complete
# Check Chrome version on Linux/macOS
google-chrome --version
# Force Chrome update via command line (Windows)
# Navigate to chrome://settings/help to trigger update check
# Enterprise deployment: Use Group Policy or MDM to enforce minimum version
# Set minimum Chrome version to 81.0.4044.92 or later
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
