CVE-2023-39611
📋 TL;DR
This vulnerability in Software FX Chart FX 7 allows attackers to perform directory traversal attacks by sending specially crafted web requests, enabling them to enumerate and read files from the local filesystem. It affects organizations using Chart FX 7 version 7.0.4962.20829, particularly those exposing the software to untrusted networks.
💻 Affected Systems
- Software FX Chart FX 7
📦 What is this software?
Chart Fx by Softwarefx
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive system files, configuration files, or application data, potentially leading to credential theft, data exfiltration, or further system compromise.
Likely Case
Attackers would enumerate directory structures and read accessible files, potentially obtaining configuration information, logs, or other sensitive data stored in predictable locations.
If Mitigated
With proper network segmentation and access controls, impact would be limited to files accessible by the application service account within its permitted directories.
🎯 Exploit Status
The vulnerability requires sending crafted web requests but does not require authentication. Public technical details are available in the referenced Medium article.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch is currently available. Monitor Software FX for security updates and advisories.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to Chart FX 7 endpoints to only trusted IP addresses or internal networks.
Web Application Firewall Rules
allImplement WAF rules to block directory traversal patterns and suspicious file access requests.
🧯 If You Can't Patch
- Isolate Chart FX 7 servers in a segmented network zone with strict inbound/outbound controls
- Implement application-level input validation to reject requests containing directory traversal sequences
🔍 How to Verify
Check if Vulnerable:
Check if Chart FX 7 version 7.0.4962.20829 is installed and exposed via web endpoints. Test with controlled directory traversal payloads in a safe environment.Check Version:
Check application version through Chart FX 7 interface or installation directory properties.Verify Fix Applied:
Verify that directory traversal payloads no longer return file contents when sent to Chart FX 7 endpoints.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing '../' sequences or unusual file paths
- Multiple failed file access attempts from single source
Network Indicators:
- HTTP requests with directory traversal patterns to Chart FX 7 endpoints
- Unusual file read patterns from web application
SIEM Query:
sourceIP="*" AND (url="*../*" OR url="*..\\*" OR url="*%2e%2e%2f*") AND destPort="[Chart FX port]"