CVE-2025-0244
📋 TL;DR
This vulnerability in Firefox for Android allows attackers to spoof the address bar when redirecting to invalid protocol schemes, potentially tricking users into believing they're on legitimate sites. Only affects Android users running Firefox versions below 134.
💻 Affected Systems
- Mozilla Firefox
📦 What is this software?
Firefox by Mozilla
⚠️ Risk & Real-World Impact
Worst Case
Users could be tricked into entering sensitive information on spoofed sites that appear legitimate in the address bar, leading to credential theft or financial fraud.
Likely Case
Phishing attacks where users are redirected to malicious sites that appear to be legitimate due to address bar spoofing.
If Mitigated
Minimal impact if users verify URLs carefully and don't enter sensitive information on suspicious sites.
🎯 Exploit Status
Exploitation requires user interaction (clicking a malicious link) and affects only Android Firefox browsers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firefox 134
Vendor Advisory: https://www.mozilla.org/security/advisories/mfsa2025-01/
Restart Required: Yes
Instructions:
1. Open Google Play Store on Android device. 2. Search for Firefox. 3. If update is available, tap Update. 4. Restart Firefox after update completes.
🔧 Temporary Workarounds
Disable automatic redirects
androidConfigure Firefox to prompt before redirecting to prevent automatic exploitation
about:config
Set accessibility.blockautorefresh to true
🧯 If You Can't Patch
- Use alternative browsers on Android until Firefox can be updated
- Educate users to manually verify URLs before entering sensitive information
🔍 How to Verify
Check if Vulnerable:
Open Firefox on Android, go to Settings > About Firefox, check if version is below 134Check Version:
Open Firefox > Settings > About FirefoxVerify Fix Applied:
Confirm Firefox version is 134 or higher in Settings > About Firefox📡 Detection & Monitoring
Log Indicators:
- Unusual redirect patterns in web server logs
- Multiple failed protocol scheme redirects
Network Indicators:
- HTTP redirects to invalid protocol schemes (e.g., invalid:// URLs)
SIEM Query:
web.url CONTAINS "invalid://" OR web.url CONTAINS unusual protocol schemes