CVE-2024-48533
📋 TL;DR
This vulnerability allows attackers to determine which email addresses have valid user accounts in eSoft Planner by observing different responses from the 'Forgot your Login?' module. This affects all organizations using the vulnerable version of eSoft Planner software.
💻 Affected Systems
- eSoft Planner
📦 What is this software?
Esoft Planner by Esoftplanner
⚠️ Risk & Real-World Impact
Worst Case
Attackers could enumerate all valid user accounts, then use this information for targeted phishing campaigns, credential stuffing attacks, or social engineering to gain unauthorized access.
Likely Case
Attackers will use automated tools to test common email patterns and identify valid accounts, then attempt password spraying or targeted attacks against those accounts.
If Mitigated
With proper monitoring and rate limiting, the impact is limited to potential reconnaissance that can be detected and blocked before account compromise.
🎯 Exploit Status
The vulnerability is simple to exploit with basic HTTP requests and response analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check with eSoft for official patches or updates. Monitor the GitHub repository for community-developed fixes.
🔧 Temporary Workarounds
Implement Rate Limiting
allLimit the number of password reset attempts per IP address or account to prevent automated enumeration.
Standardize Error Responses
allModify the 'Forgot your Login?' module to return identical responses regardless of whether an email exists in the system.
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to detect and block enumeration patterns
- Enable detailed logging of password reset attempts and monitor for suspicious patterns
🔍 How to Verify
Check if Vulnerable:
Test the 'Forgot your Login?' functionality with known valid and invalid email addresses. If responses differ (timing, content, or error messages), the system is vulnerable.Check Version:
Check the eSoft Planner interface or configuration files for version information.Verify Fix Applied:
After applying mitigations, test with both valid and invalid emails to confirm identical responses are returned regardless of account existence.📡 Detection & Monitoring
Log Indicators:
- Multiple failed password reset attempts from single IP
- Unusual patterns of password reset requests for non-existent accounts
Network Indicators:
- High volume of POST requests to password reset endpoint
- Sequential email pattern testing in HTTP requests
SIEM Query:
source="web_logs" AND (url_path="/forgot-password" OR url_path="/reset-password") AND status_code=200 | stats count by src_ip