CVE-2018-10867
📋 TL;DR
This vulnerability in the redhat-certification 7 package allows unrestricted file access via the /update/results page, enabling attackers to delete any file accessible by the apached user. It affects systems running the vulnerable redhat-certification package. The high CVSS score reflects the potential for significant system damage.
💻 Affected Systems
- redhat-certification
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through deletion of critical system files, potentially causing system crashes, data loss, or service disruption.
Likely Case
Unauthorized deletion of configuration files, log files, or application data leading to service disruption and potential data loss.
If Mitigated
Limited impact if proper file permissions and access controls restrict apached user privileges.
🎯 Exploit Status
Exploitation appears straightforward via web requests to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest redhat-certification package version
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2018-10867
Restart Required: Yes
Instructions:
1. Check current package version: rpm -q redhat-certification
2. Update via yum: sudo yum update redhat-certification
3. Restart Apache/httpd service: sudo systemctl restart httpd
🔧 Temporary Workarounds
Restrict access to /update/results endpoint
linuxBlock or restrict access to the vulnerable URL path via web server configuration
# Add to Apache configuration:
<Location "/update/results">
Require all denied
</Location>
Remove redhat-certification package
linuxUninstall the vulnerable package if not required
sudo yum remove redhat-certification
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems
- Apply strict file permissions to limit apached user's access to critical files
🔍 How to Verify
Check if Vulnerable:
Check if redhat-certification package is installed and accessible via web interface at /update/resultsCheck Version:
rpm -q redhat-certificationVerify Fix Applied:
Verify package is updated to latest version and test that /update/results endpoint no longer allows file deletion📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /update/results with file deletion parameters
- Apache access logs showing file manipulation attempts
Network Indicators:
- HTTP POST/GET requests to /update/results endpoint with file paths
SIEM Query:
source="apache_access" AND uri_path="/update/results" AND (method="POST" OR method="GET")