CVE-2024-31392
📋 TL;DR
This vulnerability in Firefox for iOS causes the browser to incorrectly display a secure lock icon when insecure content loads on a page after a delay, creating a false sense of security. It affects Firefox for iOS users running versions below 124. Attackers could exploit this to make users believe they're on a secure site when mixed content is present.
💻 Affected Systems
- Firefox for iOS
📦 What is this software?
Firefox by Mozilla
⚠️ Risk & Real-World Impact
Worst Case
Users could be tricked into entering sensitive information on pages that appear secure but contain insecure elements, leading to credential theft or session hijacking.
Likely Case
Users might not notice mixed content warnings, potentially exposing them to man-in-the-middle attacks or content manipulation on seemingly secure sites.
If Mitigated
With proper user awareness and updated browsers, the risk is limited to visual deception without direct code execution.
🎯 Exploit Status
Exploitation requires user interaction (visiting a malicious site) but doesn't require authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firefox for iOS 124
Vendor Advisory: https://www.mozilla.org/security/advisories/mfsa2024-17/
Restart Required: Yes
Instructions:
1. Open the App Store on iOS. 2. Search for Firefox. 3. Tap 'Update' if available. 4. Restart Firefox after update completes.
🔧 Temporary Workarounds
Use alternative browser
iosTemporarily use Safari or another updated browser until Firefox is patched.
Enable strict HTTPS enforcement
iosUse browser settings to enforce HTTPS-only mode where available.
🧯 If You Can't Patch
- Educate users to manually check URLs and look for mixed content warnings
- Implement network filtering to block known malicious sites
🔍 How to Verify
Check if Vulnerable:
Check Firefox version in Settings > About Firefox. If version is below 124, you are vulnerable.Check Version:
Open Firefox > Settings > About FirefoxVerify Fix Applied:
After updating, verify version is 124 or higher in Settings > About Firefox.📡 Detection & Monitoring
Log Indicators:
- Unusual mixed content loading patterns
- User reports of incorrect security icons
Network Indicators:
- HTTP content loading on HTTPS pages
- Mixed content warnings in browser logs
SIEM Query:
Not applicable for client-side browser vulnerability