CVE-2021-30590
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code or cause denial of service via heap corruption in Google Chrome's bookmark handling. Attackers can exploit this by tricking users into visiting a malicious webpage. All users running vulnerable Chrome versions are affected.
💻 Affected Systems
- Google Chrome
📦 What is this software?
Chrome by Google
Google Chrome is the world's most popular web browser, used by over 3 billion users globally across Windows, macOS, Linux, Android, and iOS platforms. As a Chromium-based browser developed by Google, Chrome dominates the browser market with approximately 65% market share, making it a critical compon...
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⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or ransomware deployment.
Likely Case
Browser crash (denial of service) or limited code execution within browser sandbox.
If Mitigated
No impact if Chrome is fully patched or if exploit attempts are blocked by security controls.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious page). No public exploit code was found in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 92.0.4515.131
Vendor Advisory: https://chromereleases.googleblog.com/2021/08/the-stable-channel-has-been-updated-to.html
Restart Required: Yes
Instructions:
1. Open Chrome. 2. Click menu (three dots) → Help → About Google Chrome. 3. Chrome will automatically check for and install updates. 4. Click 'Relaunch' to restart Chrome.
🔧 Temporary Workarounds
Disable JavaScript
allPrevents execution of malicious JavaScript that could trigger the vulnerability.
Use Browser Sandboxing
allRun Chrome in sandboxed environment to limit impact of potential exploitation.
🧯 If You Can't Patch
- Block access to untrusted websites using web filtering or firewall rules.
- Implement application whitelisting to prevent unauthorized code execution.
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: If version is below 92.0.4515.131, system is vulnerable.Check Version:
chrome://version/ (in Chrome address bar) or 'google-chrome --version' (Linux terminal)Verify Fix Applied:
Confirm Chrome version is 92.0.4515.131 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with memory corruption errors
- Unexpected Chrome process termination
Network Indicators:
- HTTP requests to known malicious domains hosting exploit code
- Unusual outbound connections from Chrome processes
SIEM Query:
source="chrome" AND (event_type="crash" OR message="*heap*" OR message="*buffer*overflow*")🔗 References
- https://chromereleases.googleblog.com/2021/08/the-stable-channel-has-been-updated-to.html
- https://crbug.com/1227777
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LVY4WIWTVVYKQMROJJS365TZBKEARCF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IPJPUSAWIJMQFBQQQYXAICLI4EKFQOH6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QW4R2K5HVJ4R6XDZYOJCCFPIN2XHNS3L/
- https://chromereleases.googleblog.com/2021/08/the-stable-channel-has-been-updated-to.html
- https://crbug.com/1227777
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LVY4WIWTVVYKQMROJJS365TZBKEARCF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IPJPUSAWIJMQFBQQQYXAICLI4EKFQOH6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QW4R2K5HVJ4R6XDZYOJCCFPIN2XHNS3L/
