CVE-2024-57435
📋 TL;DR
This vulnerability in macrozheng mall-tiny 1.0.1 allows attackers to cause denial-of-service by sending null data through the resource creation interface, triggering a null pointer dereference that crashes the service and prevents restart. All users running the vulnerable version are affected, particularly those with exposed authentication interfaces.
💻 Affected Systems
- macrozheng mall-tiny
📦 What is this software?
Mall Tiny by Macrozheng
⚠️ Risk & Real-World Impact
Worst Case
Complete service unavailability requiring manual intervention to restore functionality, potentially leading to extended downtime.
Likely Case
Service crashes requiring restart, causing temporary disruption to authenticated operations.
If Mitigated
Minimal impact with proper input validation and error handling in place.
🎯 Exploit Status
Exploitation requires access to the resource creation interface but does not require authentication for the initial null data injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check for official patch from macrozheng. 2. If unavailable, implement input validation. 3. Restart service after applying fixes.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to reject null data in resource creation requests
Implement null check in resource creation endpoint: if (data == null) { return error_response; }
WAF Rule
allBlock requests with null payloads to the resource creation endpoint
Add WAF rule to detect and block requests with null/empty payloads to vulnerable endpoints
🧯 If You Can't Patch
- Implement network segmentation to restrict access to the resource creation interface
- Add rate limiting to prevent mass exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Send a POST request with null data to the resource creation endpoint and observe if service crashes or returns errorCheck Version:
Check application version in configuration files or via application info endpointVerify Fix Applied:
Test with null data payload - service should return proper error response without crashing📡 Detection & Monitoring
Log Indicators:
- Null pointer exception logs
- Service crash/restart logs
- Unusual resource creation requests
Network Indicators:
- Multiple POST requests with null/empty payloads to resource endpoints
- Sudden service unavailability
SIEM Query:
source="application.logs" AND ("NullPointerException" OR "service crashed") AND endpoint="resource/create"