CVE-2025-1921
📋 TL;DR
This vulnerability in Google Chrome's Media Stream implementation allows a remote attacker to gather information about connected peripherals (like webcams, microphones, or other media devices) by tricking users into visiting a malicious webpage. It affects all Chrome users on desktop platforms who haven't updated to the patched version. The attacker can potentially identify what devices are connected to a user's system without proper permissions.
💻 Affected Systems
- Google Chrome
- Chromium-based browsers
📦 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...
Learn more about Chrome →⚠️ Risk & Real-World Impact
Worst Case
An attacker could fingerprint users by identifying specific peripheral models, potentially correlating devices across sessions or identifying corporate hardware configurations, leading to targeted attacks or privacy violations.
Likely Case
Attackers embed malicious code in websites to silently gather information about connected media devices, which could be used for tracking, profiling, or reconnaissance for more targeted attacks.
If Mitigated
With updated Chrome and standard web security controls, the vulnerability is eliminated, and users are protected from this information disclosure.
🎯 Exploit Status
Exploitation requires user interaction (visiting a malicious webpage) but no authentication. The CWE-1230 (Exposure of Sensitive Information Through Data Queries) suggests straightforward exploitation through crafted HTML/JavaScript.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 134.0.6998.35
Vendor Advisory: https://chromereleases.googleblog.com/2025/03/stable-channel-update-for-desktop.html
Restart Required: Yes
Instructions:
1. Open Chrome. 2. Click the three-dot menu > Help > About Google Chrome. 3. Chrome will automatically check for and apply the update. 4. Click 'Relaunch' to restart Chrome with the fixed version.
🔧 Temporary Workarounds
Disable Media Stream API
allPrevents Chrome from accessing media devices entirely, blocking the vulnerability but breaking legitimate webcam/microphone functionality.
chrome://flags/#disable-webrtc
Set to 'Disabled'
🧯 If You Can't Patch
- Use browser extensions to block JavaScript on untrusted websites to prevent malicious code execution.
- Restrict Chrome usage to trusted websites only and enforce network-level filtering for suspicious domains.
🔍 How to Verify
Check if Vulnerable:
Open Chrome, go to chrome://version, and check if the version is below 134.0.6998.35.Check Version:
On Windows/macOS/Linux: Open Chrome and navigate to chrome://versionVerify Fix Applied:
After updating, confirm the version in chrome://version is 134.0.6998.35 or higher.📡 Detection & Monitoring
Log Indicators:
- Unusual Media Stream API calls in browser dev tools or network logs from untrusted domains
Network Indicators:
- HTTP requests to known malicious domains hosting crafted HTML pages
SIEM Query:
source="browser_logs" AND event="MediaStream" AND url_domain NOT IN (trusted_domains)