CVE-2022-0913
📋 TL;DR
This integer overflow vulnerability in Microweber CMS allows attackers to cause denial of service or potentially execute arbitrary code by triggering memory corruption. It affects all Microweber installations prior to version 1.3, particularly those exposed to untrusted user input.
💻 Affected Systems
- Microweber CMS
📦 What is this software?
Microweber by Microweber
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Denial of service causing application crashes and service disruption.
If Mitigated
Limited impact with proper input validation and memory protections in place.
🎯 Exploit Status
Exploitation requires crafting specific input to trigger integer overflow. No public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3 and later
Vendor Advisory: https://github.com/microweber/microweber/commit/7559e141d0707f8eeff2f9aeaa5a0ca2e3fe6583
Restart Required: Yes
Instructions:
1. Backup your Microweber installation and database. 2. Update to Microweber 1.3 or later via the admin panel or manual download. 3. Restart your web server. 4. Verify the fix by checking the version.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation for numeric parameters to prevent overflow conditions.
Add input validation in PHP code: if (!is_numeric($input) || $input > PHP_INT_MAX) { die('Invalid input'); }
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block suspicious integer inputs
- Restrict access to vulnerable endpoints using network segmentation or authentication
🔍 How to Verify
Check if Vulnerable:
Check Microweber version in admin panel or via composer show microweber/microweberCheck Version:
composer show microweber/microweber | grep versionVerify Fix Applied:
Verify version is 1.3 or higher and check that the commit 7559e141d0707f8eeff2f9aeaa5a0ca2e3fe6583 is applied📡 Detection & Monitoring
Log Indicators:
- Unusual large integer values in request parameters
- Application crashes or segmentation faults in error logs
Network Indicators:
- HTTP requests with abnormally large numeric parameters
- Repeated requests to vulnerable endpoints
SIEM Query:
source="web_server_logs" AND (param_value>2147483647 OR param_value<-2147483648)🔗 References
- https://github.com/microweber/microweber/commit/7559e141d0707f8eeff2f9aeaa5a0ca2e3fe6583
- https://huntr.dev/bounties/f5f3e468-663b-4df0-8340-a2d77e4cc75f
- https://github.com/microweber/microweber/commit/7559e141d0707f8eeff2f9aeaa5a0ca2e3fe6583
- https://huntr.dev/bounties/f5f3e468-663b-4df0-8340-a2d77e4cc75f
