CVE-2023-38042
📋 TL;DR
This CVE describes a local privilege escalation vulnerability in Ivanti Secure Access Client for Windows. It allows authenticated low-privileged users to execute arbitrary code with SYSTEM-level privileges, potentially compromising the entire Windows system. Organizations using affected versions of Ivanti Secure Access Client on Windows are at risk.
💻 Affected Systems
- Ivanti Secure Access Client
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local user access could gain complete SYSTEM control over the Windows machine, install persistent malware, steal credentials, access sensitive data, and pivot to other systems.
Likely Case
Malicious insiders or attackers who have gained initial access through other means escalate privileges to SYSTEM to maintain persistence, disable security controls, and move laterally.
If Mitigated
With proper endpoint protection, least privilege enforcement, and network segmentation, impact is limited to the compromised host with reduced lateral movement potential.
🎯 Exploit Status
Local privilege escalation vulnerabilities typically have low exploitation complexity once initial access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Ivanti advisory for specific patched versions
Vendor Advisory: https://forums.ivanti.com/s/article/Security-Advisory-May-2024?language=en_US
Restart Required: Yes
Instructions:
1. Review Ivanti advisory for affected versions. 2. Download and install the latest patched version of Ivanti Secure Access Client. 3. Restart affected systems. 4. Verify the update was successful.
🔧 Temporary Workarounds
Remove local user access
windowsRestrict local user access to systems running Ivanti Secure Access Client to reduce attack surface
Implement application control
windowsUse Windows Defender Application Control or similar to restrict execution of unauthorized binaries
🧯 If You Can't Patch
- Implement strict least privilege principles - ensure users only have necessary permissions
- Deploy endpoint detection and response (EDR) solutions to detect privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Ivanti Secure Access Client version against affected versions listed in the Ivanti advisoryCheck Version:
Check program version in Control Panel > Programs and Features or via Ivanti client interfaceVerify Fix Applied:
Verify Ivanti Secure Access Client version matches or exceeds the patched version specified in the advisory📡 Detection & Monitoring
Log Indicators:
- Unusual process creation with SYSTEM privileges from user contexts
- Ivanti Secure Access Client service anomalies
Network Indicators:
- Unusual outbound connections from systems after local privilege escalation
SIEM Query:
Process Creation where Parent Process contains 'ivanti' AND Integrity Level changes to 'System'