CVE-2023-1683
📋 TL;DR
This vulnerability in Xunrui CMS 4.61 allows remote attackers to access sensitive information through the /dayrui/Fcms/View/system_log.html file. It affects all systems running Xunrui CMS 4.61 with the vulnerable file accessible. The information disclosure could expose system logs containing potentially sensitive data.
💻 Affected Systems
- Xunrui CMS
📦 What is this software?
Xunruicms by Xunruicms
⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain sensitive system logs containing user data, configuration details, or administrative credentials, leading to further system compromise.
Likely Case
Unauthorized access to system logs revealing operational details, user activities, or error messages that could aid in reconnaissance for further attacks.
If Mitigated
Limited exposure of non-critical log information with proper access controls and monitoring in place.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making this easily exploitable by attackers with minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
Restrict access to vulnerable file
allBlock access to /dayrui/Fcms/View/system_log.html using web server configuration or firewall rules
# Apache: Add to .htaccess
<Files "system_log.html">
Order Allow,Deny
Deny from all
</Files>
# Nginx: Add to server block
location ~* /dayrui/Fcms/View/system_log\.html$ {
deny all;
return 403;
}
Remove or rename vulnerable file
allDelete or rename the system_log.html file to prevent access
# Linux/macOS
rm /path/to/dayrui/Fcms/View/system_log.html
# Windows
del "C:\path\to\dayrui\Fcms\View\system_log.html"
🧯 If You Can't Patch
- Implement strict network segmentation to limit access to affected systems
- Deploy web application firewall (WAF) rules to block requests to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Attempt to access http://[target]/dayrui/Fcms/View/system_log.html. If accessible and returns system log content, the system is vulnerable.Check Version:
Check Xunrui CMS version in admin panel or configuration files. Look for version 4.61 in system files.Verify Fix Applied:
After implementing workarounds, verify that accessing the vulnerable URL returns 403 Forbidden or 404 Not Found.📡 Detection & Monitoring
Log Indicators:
- HTTP 200 responses to /dayrui/Fcms/View/system_log.html
- Unusual access patterns to log files
- Multiple requests to system_log.html from single IPs
Network Indicators:
- HTTP GET requests to /dayrui/Fcms/View/system_log.html
- Traffic from known scanning IPs to the vulnerable endpoint
SIEM Query:
source="web_server" AND (uri="/dayrui/Fcms/View/system_log.html" OR uri LIKE "%/system_log.html") AND response_code=200