CVE-2024-38486
📋 TL;DR
This vulnerability allows a low-privileged attacker with remote access to execute arbitrary commands on Dell SmartFabric OS10 networking devices through command injection. Attackers could gain unauthorized control over affected switches and potentially pivot to other network segments. Organizations using Dell SmartFabric OS10 switches in versions 10.5.5.4 through 10.5.5.10 and all 10.5.6.x releases are affected.
💻 Affected Systems
- Dell SmartFabric OS10 Software
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full compromise of network infrastructure, lateral movement to other systems, data exfiltration, and network disruption through configuration changes or denial of service.
Likely Case
Unauthorized command execution leading to configuration changes, credential harvesting, or installation of persistent backdoors on affected switches.
If Mitigated
Limited impact if network segmentation restricts access and proper authentication controls are in place, though the vulnerability still exists.
🎯 Exploit Status
Exploitation requires low-privileged access, which could be obtained through other vulnerabilities or misconfigurations. The CWE-77 pattern suggests straightforward command injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version 10.5.5.11 or later for 10.5.5.x branch, or 10.5.6.3 or later for 10.5.6.x branch
Vendor Advisory: https://www.dell.com/support/kbdoc/en-us/000228355/dsa-2024-376-security-update-for-dell-networking-os10-vulnerability
Restart Required: Yes
Instructions:
1. Download the appropriate patch from Dell Support. 2. Backup current configuration. 3. Apply the patch following Dell's upgrade procedures. 4. Reboot the device as required. 5. Verify the new version is running.
🔧 Temporary Workarounds
Restrict Network Access
dell-os10Limit access to management interfaces to trusted IP addresses only using ACLs
configure terminal
ip access-list standard MGMT-ACL
permit ip <trusted-network> any
deny ip any any
interface management <interface>
ip access-group MGMT-ACL in
Enhance Authentication Controls
dell-os10Implement strong authentication mechanisms and limit low-privileged user access
configure terminal
aaa authentication login default group tacacs+ local
aaa authorization exec default group tacacs+ local
aaa accounting exec default start-stop group tacacs+
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected switches from untrusted networks
- Monitor for suspicious command execution patterns and unauthorized configuration changes
🔍 How to Verify
Check if Vulnerable:
Check the current OS version using 'show version' command and compare against affected versionsCheck Version:
show version | include VersionVerify Fix Applied:
Verify the version is 10.5.5.11 or higher for 10.5.5.x branch, or 10.5.6.3 or higher for 10.5.6.x branch📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Failed authentication attempts followed by successful low-privileged access
- Configuration changes from unexpected sources
Network Indicators:
- Unexpected traffic patterns from switch management interfaces
- Connection attempts to switch management ports from unauthorized sources
SIEM Query:
source="dell-os10" AND (event_type="command_execution" AND user="low_privilege") OR (event_type="config_change" AND user!="authorized_admin")