CVE-2022-20732
📋 TL;DR
This vulnerability allows authenticated local attackers on Cisco Virtualized Infrastructure Manager (VIM) to access improperly protected configuration files containing database credentials. Attackers can use these credentials to view/modify the database and escalate privileges. Only local attackers with low-privileged credentials are affected.
💻 Affected Systems
- Cisco Virtualized Infrastructure Manager (VIM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attacker gains administrative control, accesses sensitive data, and potentially pivots to other systems in the infrastructure.
Likely Case
Privilege escalation leading to unauthorized access to sensitive configuration data and potential disruption of VIM operations.
If Mitigated
Limited impact with proper access controls and monitoring, though risk remains if configuration files remain accessible.
🎯 Exploit Status
Exploitation requires local access and low-privileged credentials, but the actual file access is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Release 4.2.1 or later
Vendor Advisory: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vim-privesc-T2tsFUf
Restart Required: Yes
Instructions:
1. Download Cisco VIM Release 4.2.1 or later from Cisco Software Center. 2. Follow Cisco VIM upgrade procedures documented in the installation guide. 3. Apply the update to all affected VIM deployments. 4. Restart services as required during the upgrade process.
🔧 Temporary Workarounds
Restrict File Permissions
linuxManually adjust permissions on configuration files to prevent unauthorized access
chmod 600 /path/to/configuration/files/*.conf
chown root:root /path/to/configuration/files/*.conf
🧯 If You Can't Patch
- Implement strict access controls to limit local user access to VIM systems
- Monitor file access logs for unauthorized attempts to read configuration files
🔍 How to Verify
Check if Vulnerable:
Check Cisco VIM version: If running Release earlier than 4.2.1, system is vulnerable. Also check file permissions on configuration files in /opt/cisco/vim/ directory.Check Version:
vim --version | grep 'Release'Verify Fix Applied:
Verify version is 4.2.1 or later using 'vim --version' or check installation logs. Confirm configuration files have proper permissions (600 or more restrictive).📡 Detection & Monitoring
Log Indicators:
- Unauthorized file access attempts to configuration files
- Database connection attempts from unexpected user accounts
- Privilege escalation attempts in system logs
Network Indicators:
- Unusual database traffic patterns from VIM systems
- Authentication attempts to database from non-standard accounts
SIEM Query:
source="vim_logs" AND (file_access="/opt/cisco/vim/*.conf" OR event="permission_denied")