CVE-2024-42027
📋 TL;DR
Rocket.Chat Mobile apps before version 4.5.1 generate weak end-to-end encryption (E2EE) passwords with insufficient entropy, making them vulnerable to brute-force attacks. Attackers who can capture encrypted communications could potentially decrypt them given enough time and computational resources. This affects all users of vulnerable Rocket.Chat Mobile applications.
💻 Affected Systems
- Rocket.Chat Mobile
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers decrypt sensitive end-to-end encrypted communications, exposing private messages, files, and confidential business discussions.
Likely Case
Targeted attacks against high-value individuals or organizations where attackers invest resources to crack weak encryption keys.
If Mitigated
Limited exposure if strong network controls prevent interception of encrypted traffic or if alternative secure communication channels are used.
🎯 Exploit Status
Requires ability to capture encrypted communications and significant computational resources for brute-force attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.5.1
Vendor Advisory: https://hackerone.com/reports/2546437
Restart Required: Yes
Instructions:
1. Update Rocket.Chat Mobile app to version 4.5.1 or later from official app stores. 2. Ensure all mobile clients are updated. 3. Consider regenerating E2EE keys after update for maximum security.
🔧 Temporary Workarounds
Disable E2EE on Mobile
allTemporarily disable end-to-end encryption in Rocket.Chat Mobile settings until patched
Use Web/Desktop Clients
allUse Rocket.Chat web or desktop clients instead of mobile apps for sensitive communications
🧯 If You Can't Patch
- Disable end-to-end encryption feature in mobile app settings
- Implement network monitoring to detect unusual traffic patterns or brute-force attempts
🔍 How to Verify
Check if Vulnerable:
Check Rocket.Chat Mobile app version in settings. If version is below 4.5.1 and E2EE is enabled, the system is vulnerable.Check Version:
Check app version in Settings > About or similar menu within Rocket.Chat Mobile appVerify Fix Applied:
Confirm app version is 4.5.1 or higher in app settings. Verify E2EE functionality works normally.📡 Detection & Monitoring
Log Indicators:
- Unusual failed decryption attempts
- Multiple connection attempts from same source
Network Indicators:
- Unusual volume of encrypted traffic to/from mobile devices
- Patterns suggesting brute-force attacks
SIEM Query:
source="rocketchat" AND (event_type="authentication_failure" OR event_type="decryption_error")