CVE-2020-25716
📋 TL;DR
CVE-2020-25716 is a privilege escalation vulnerability in CloudForms where users with specific group permissions can perform administrator-only actions like exporting or importing administrator files. This affects data confidentiality and integrity. Systems running CloudForms versions before 5.11.10.1 are vulnerable.
💻 Affected Systems
- Red Hat CloudForms Management Engine
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker with specific group access could export sensitive administrator files, modify system configurations, or import malicious administrator files to gain full administrative control over the CloudForms instance.
Likely Case
An authenticated attacker with group permissions could export administrator files containing sensitive configuration data, potentially leading to further privilege escalation or data exposure.
If Mitigated
With proper access controls and network segmentation, the impact is limited to authorized users within specific groups, reducing the risk of widespread compromise.
🎯 Exploit Status
Exploitation requires authenticated access with specific group permissions. The vulnerability is in the role-based access control mechanism.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: cfme 5.11.10.1 and later
Vendor Advisory: https://bugzilla.redhat.com/show_bug.cgi?id=1898525
Restart Required: Yes
Instructions:
1. Update CloudForms to version 5.11.10.1 or later using the Red Hat update mechanism. 2. Restart the CloudForms services after patching. 3. Verify the fix by checking the version and testing export/import functionality.
🔧 Temporary Workarounds
Restrict Group Permissions
allTemporarily remove export and import permissions from all non-administrator groups until patching can be completed.
# Use CloudForms web interface to modify group permissions
# Navigate to Configuration -> Access Control -> Groups
# Edit each group and remove 'Import/Export' privileges
🧯 If You Can't Patch
- Implement strict network segmentation to isolate CloudForms instances from sensitive systems
- Enhance monitoring of export/import activities and implement alerting for suspicious file operations
🔍 How to Verify
Check if Vulnerable:
Check the CloudForms version via the web interface (Help -> About) or command line. If version is below 5.11.10.1, the system is vulnerable.Check Version:
cat /var/www/miq/vmdb/VERSIONVerify Fix Applied:
After patching, verify the version is 5.11.10.1 or higher and test that non-administrator users cannot export or import administrator files.📡 Detection & Monitoring
Log Indicators:
- Unusual export or import operations by non-administrator users
- Failed privilege escalation attempts in authentication logs
Network Indicators:
- Unexpected file transfers from CloudForms instances
SIEM Query:
source="cloudforms" AND (event="export" OR event="import") AND user_role!="administrator"