CVE-2023-49738
📋 TL;DR
This vulnerability allows attackers to read arbitrary files on WWBN AVideo servers by exploiting improper input validation in the image404Raw.php script. It affects WWBN AVideo installations running dev master commit 15fed957fb or related vulnerable versions. Attackers can access sensitive system files without authentication.
💻 Affected Systems
- WWBN AVideo
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise through reading sensitive configuration files, SSH keys, database credentials, or other critical system files leading to further exploitation.
Likely Case
Information disclosure of sensitive files including configuration files, user data, or application source code.
If Mitigated
Limited impact with proper file permissions and network segmentation preventing access to critical system files.
🎯 Exploit Status
The vulnerability requires only HTTP requests with crafted parameters and has been publicly disclosed with technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check WWBN AVideo repository for updates after commit 15fed957fb
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2023-1881
Restart Required: No
Instructions:
1. Update WWBN AVideo to latest version. 2. Apply any security patches from the vendor. 3. Verify the image404Raw.php script has proper input validation.
🔧 Temporary Workarounds
Disable or restrict image404Raw.php
linuxTemporarily disable or restrict access to the vulnerable script
mv image404Raw.php image404Raw.php.disabled
chmod 000 image404Raw.php
Web server access control
allUse web server configuration to block access to the vulnerable endpoint
# Apache: <Location /image404Raw.php> Require all denied </Location>
# Nginx: location ~* /image404Raw\.php$ { deny all; }
🧯 If You Can't Patch
- Implement strict web application firewall rules to block requests to image404Raw.php with suspicious parameters
- Restrict file system permissions to limit what files the web server user can read
🔍 How to Verify
Check if Vulnerable:
Test if image404Raw.php accepts file path traversal parameters like ?file=../../etc/passwdCheck Version:
Check WWBN AVideo version in admin panel or git commit historyVerify Fix Applied:
Verify the script no longer accepts arbitrary file paths and returns proper error messages📡 Detection & Monitoring
Log Indicators:
- HTTP requests to image404Raw.php with suspicious file parameters
- Multiple failed file access attempts
Network Indicators:
- Unusual file path patterns in HTTP requests
- Requests attempting to access system files
SIEM Query:
source="web_logs" AND uri="*image404Raw.php*" AND (query="*../*" OR query="*file=*")