CVE-2024-48530
📋 TL;DR
This vulnerability in eSoft Planner's Instructor Appointment Availability module allows attackers to cause a Denial of Service (DoS) by sending specially crafted POST requests. The attack disrupts service availability for the affected module. Organizations using eSoft Planner 3.24.08271-USA are affected.
💻 Affected Systems
- eSoft Planner
📦 What is this software?
Esoft Planner by Esoftplanner
⚠️ Risk & Real-World Impact
Worst Case
Complete unavailability of the Instructor Appointment Availability module, potentially disrupting scheduling operations and affecting users who rely on appointment functionality.
Likely Case
Temporary service disruption to the appointment module requiring system restart or intervention to restore functionality.
If Mitigated
Minimal impact with proper network filtering and request validation in place.
🎯 Exploit Status
Crafting malicious POST requests requires minimal technical skill based on the CWE-770 (Allocation of Resources Without Limits or Throttling) classification.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Monitor vendor channels for updates.
🔧 Temporary Workarounds
Network Filtering
allImplement web application firewall (WAF) rules to block or rate-limit POST requests to the Instructor Appointment Availability endpoint.
Input Validation
allAdd server-side validation to reject malformed POST requests before processing.
🧯 If You Can't Patch
- Isolate the eSoft Planner system behind a WAF with DoS protection rules enabled.
- Implement network segmentation to restrict access to the vulnerable endpoint to trusted users only.
🔍 How to Verify
Check if Vulnerable:
Check if running eSoft Planner version 3.24.08271-USA and test with crafted POST requests to the appointment module endpoint.Check Version:
Check application version in eSoft Planner admin interface or configuration files.Verify Fix Applied:
Test with the same crafted POST requests after applying mitigations to ensure service remains available.📡 Detection & Monitoring
Log Indicators:
- Unusual volume of POST requests to appointment endpoints
- Error logs indicating resource exhaustion or service crashes
Network Indicators:
- Spike in POST request traffic to the vulnerable endpoint
- Abnormal request patterns with malformed data
SIEM Query:
source="eSoft_Planner" AND (http_method="POST" AND uri="*appointment*" AND status>=500)