CVE-2024-27715
📋 TL;DR
CVE-2024-27715 is an authentication bypass vulnerability in Eskooly Free Online School Management Software that allows remote attackers to change passwords without proper verification, leading to privilege escalation. This affects all versions up to and including v3.0. Attackers can gain unauthorized access to administrative or user accounts.
💻 Affected Systems
- Eskooly Free Online School Management Software
📦 What is this software?
Eskooly by Eskooly
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers gain administrative privileges, access sensitive student/teacher data, modify grades, alter system configurations, or deploy ransomware.
Likely Case
Account takeover leading to unauthorized access to personal information, grade manipulation, or disruption of school operations.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring in place.
🎯 Exploit Status
The vulnerability involves crafting requests to the password change mechanism without proper verification. Public technical details are available in the referenced blog posts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not provided in references
Restart Required: No
Instructions:
1. Check Eskooly vendor website for security updates
2. Upgrade to version after v3.0 if available
3. Apply any security patches provided by the vendor
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to Eskooly application to trusted IP addresses only
# Example firewall rule (Linux iptables)
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP_RANGE -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP_RANGE -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Web Application Firewall Rules
allImplement WAF rules to block suspicious password change requests
# Example ModSecurity rule
SecRule REQUEST_URI "@contains /password-change" \
"id:1001,phase:2,deny,status:403,msg:'Suspicious password change attempt'"
🧯 If You Can't Patch
- Implement strong network segmentation to isolate Eskooly from internet access
- Enable detailed logging and monitoring of all authentication and password change events
🔍 How to Verify
Check if Vulnerable:
Check Eskooly version in admin panel or configuration files. If version is 3.0 or earlier, assume vulnerable.Check Version:
Check admin dashboard or configuration files for version informationVerify Fix Applied:
Test password change functionality with invalid credentials to ensure proper verification occurs.📡 Detection & Monitoring
Log Indicators:
- Multiple failed password change attempts from single IP
- Password changes without preceding successful authentication
- Password changes for privileged accounts from unusual locations
Network Indicators:
- HTTP POST requests to password change endpoints without authentication headers
- Unusual patterns in password reset API calls
SIEM Query:
source="eskooly_logs" AND (event_type="password_change" AND auth_result="success" AND NOT auth_type="valid_credentials")