CVE-2021-21585
📋 TL;DR
CVE-2021-21585 is an OS command injection vulnerability in Dell OpenManage Enterprise's RACADM and IPMI tools. Remote authenticated users with high privileges can execute arbitrary operating system commands on affected systems. This affects Dell OpenManage Enterprise versions before 3.6.1.
💻 Affected Systems
- Dell OpenManage Enterprise
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary commands with root privileges, potentially leading to data theft, ransomware deployment, or lateral movement across the network.
Likely Case
Privileged authenticated attackers gaining remote code execution on OpenManage Enterprise servers, enabling them to modify configurations, steal credentials, or deploy malware.
If Mitigated
Limited impact due to proper access controls, network segmentation, and monitoring preventing successful exploitation even if vulnerable.
🎯 Exploit Status
Exploitation requires authenticated access with high privileges. Command injection vulnerabilities are commonly exploited.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.6.1
Vendor Advisory: https://www.dell.com/support/kbdoc/000189673
Restart Required: Yes
Instructions:
1. Download OpenManage Enterprise version 3.6.1 or later from Dell Support. 2. Backup current configuration. 3. Apply the update through the OpenManage Enterprise web interface. 4. Restart the OpenManage Enterprise service or server as required.
🔧 Temporary Workarounds
Restrict Access to OpenManage Enterprise
allLimit network access to OpenManage Enterprise management interface to trusted IP addresses only.
Configure firewall rules to restrict access to OpenManage Enterprise ports (typically 443, 1311)
Reduce Privileged Accounts
allMinimize number of users with high privileges in OpenManage Enterprise and implement least privilege access.
Review and remove unnecessary administrative accounts from OpenManage Enterprise
🧯 If You Can't Patch
- Implement strict network segmentation to isolate OpenManage Enterprise servers from critical systems
- Enable detailed logging and monitoring for command execution attempts and privilege escalation
🔍 How to Verify
Check if Vulnerable:
Check OpenManage Enterprise version in web interface under Help > About. If version is below 3.6.1, system is vulnerable.Check Version:
In OpenManage Enterprise web interface: Navigate to Help > About to view versionVerify Fix Applied:
Verify version is 3.6.1 or higher in Help > About. Test RACADM and IPMI functionality to ensure they work without allowing command injection.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed authentication attempts followed by successful login
- Suspicious process creation from OpenManage Enterprise services
Network Indicators:
- Unusual outbound connections from OpenManage Enterprise server
- Traffic patterns indicating command and control activity
SIEM Query:
source="OpenManage" AND (event_type="command_execution" OR process_name="cmd.exe" OR process_name="bash")