CVE-2021-25992
📋 TL;DR
CVE-2021-25992 is a session management vulnerability in Ifme where user sessions remain valid after logout, allowing attackers to reuse admin cookies. This affects all Ifme users from versions 1.0.0 through 7.33.2. Attackers with access to session cookies could potentially gain unauthorized administrative access.
💻 Affected Systems
- Ifme
📦 What is this software?
Ifme by If Me
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of administrative accounts leading to data theft, account takeover, and system manipulation
Likely Case
Unauthorized access to user accounts and potential privilege escalation
If Mitigated
Limited impact with proper session management and network segmentation
🎯 Exploit Status
Exploitation requires access to valid session cookies but is technically simple once obtained
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.33.3 and later
Vendor Advisory: https://github.com/ifmeorg/ifme/commit/014f6d3526a594109d4d6607c2f30b1865e37611
Restart Required: Yes
Instructions:
1. Update Ifme to version 7.33.3 or later
2. Restart the Ifme application
3. Force all users to log out and log back in to invalidate existing sessions
🔧 Temporary Workarounds
Session Timeout Reduction
allReduce session timeout duration to minimize window for cookie reuse
Modify session configuration in config/session_store.rb to set shorter expiration
Network Segmentation
allRestrict network access to Ifme application to trusted networks only
Configure firewall rules to limit access to Ifme ports
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the Ifme application
- Monitor for unusual session activity and implement automated session termination for suspicious behavior
🔍 How to Verify
Check if Vulnerable:
Check Ifme version: if version is between 1.0.0 and 7.33.2 inclusive, system is vulnerableCheck Version:
Check the Ifme application version in the admin interface or application configurationVerify Fix Applied:
Verify version is 7.33.3 or later and test that sessions are properly invalidated after logout📡 Detection & Monitoring
Log Indicators:
- Multiple successful logins from same session ID after logout
- Admin access from unexpected IP addresses
Network Indicators:
- Unusual session cookie reuse patterns
- Multiple authentication requests with same credentials
SIEM Query:
source="ifme" AND (event="login" OR event="logout") | stats count by session_id | where count > 1🔗 References
- https://github.com/ifmeorg/ifme/commit/014f6d3526a594109d4d6607c2f30b1865e37611
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25992
- https://github.com/ifmeorg/ifme/commit/014f6d3526a594109d4d6607c2f30b1865e37611
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25992
