CVE-2025-38743
📋 TL;DR
Dell iDRAC Service Module (iSM) versions before 6.0.3.0 contain a buffer length validation vulnerability that allows local attackers with low privileges to execute arbitrary code and elevate privileges. This affects systems running vulnerable iSM versions, primarily Dell servers with iDRAC management interfaces. Attackers need local access to exploit this vulnerability.
💻 Affected Systems
- Dell iDRAC Service Module (iSM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining root/admin privileges, installing persistent backdoors, accessing sensitive data, and pivoting to other systems.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install malware, or access restricted system resources.
If Mitigated
Limited impact due to network segmentation, strict access controls, and monitoring preventing successful exploitation.
🎯 Exploit Status
Requires local access and low privileged credentials. Buffer overflow exploitation typically requires specific knowledge of memory layout.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.0.3.0 or later
Vendor Advisory: https://www.dell.com/support/kbdoc/en-us/000359617/dsa-2025-311-security-update-for-dell-idrac-service-module-vulnerabilities
Restart Required: Yes
Instructions:
1. Download iSM version 6.0.3.0 or later from Dell Support. 2. Stop iSM service. 3. Install the update. 4. Restart the service/system. 5. Verify successful installation.
🔧 Temporary Workarounds
Restrict Local Access
allLimit local access to systems running iSM to authorized administrators only.
Disable iSM if Not Required
linuxUninstall or disable iDRAC Service Module if not needed for management.
systemctl stop idrac-service-module
systemctl disable idrac-service-module
🧯 If You Can't Patch
- Implement strict access controls to limit who can log in locally to affected systems
- Monitor for privilege escalation attempts and unusual process execution
🔍 How to Verify
Check if Vulnerable:
Check iSM version: On Windows - Check Programs and Features; On Linux - Run 'rpm -qa | grep iSM' or 'dpkg -l | grep iSM'Check Version:
Windows: Get-WmiObject Win32_Product | Where-Object {$_.Name -like '*iDRAC Service Module*'} | Select-Object Name, Version; Linux: rpm -q iSM or dpkg -l iSMVerify Fix Applied:
Verify installed version is 6.0.3.0 or higher using version check commands📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from iSM context
- Failed privilege escalation attempts
- iSM service crashes or abnormal behavior
Network Indicators:
- Local authentication attempts followed by unusual process execution
SIEM Query:
source="*iSM*" AND (event_type="process_execution" OR event_type="privilege_escalation")