CVE-2023-24485
📋 TL;DR
CVE-2023-24485 allows a standard Windows user to escalate privileges to SYSTEM level on computers running Citrix Workspace app. This vulnerability affects Windows installations of Citrix Workspace app where standard users can execute arbitrary code with SYSTEM privileges. The impact is limited to local privilege escalation rather than remote exploitation.
💻 Affected Systems
- Citrix Workspace app for Windows
📦 What is this software?
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
Workspace by Citrix
⚠️ Risk & Real-World Impact
Worst Case
An authenticated local attacker gains full SYSTEM privileges, enabling complete system compromise, data theft, persistence mechanisms, and lateral movement capabilities.
Likely Case
Malicious insider or compromised user account escalates privileges to install malware, steal credentials, or bypass security controls on the local system.
If Mitigated
With proper user access controls and endpoint protection, impact is limited to isolated systems with minimal lateral movement potential.
🎯 Exploit Status
Exploitation requires local access and standard user privileges. No public exploit code has been released as of knowledge cutoff.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Citrix Workspace app 2305 and later
Vendor Advisory: https://support.citrix.com/article/CTX477617/citrix-workspace-app-for-windows-security-bulletin-for-cve202324484-cve202324485
Restart Required: Yes
Instructions:
1. Download Citrix Workspace app 2305 or later from official Citrix website. 2. Run the installer with administrative privileges. 3. Follow installation prompts. 4. Restart the system when prompted.
🔧 Temporary Workarounds
Restrict User Privileges
windowsLimit standard user access to systems running Citrix Workspace app
Application Control
windowsImplement application whitelisting to prevent unauthorized code execution
🧯 If You Can't Patch
- Implement strict least privilege access controls on affected systems
- Deploy endpoint detection and response (EDR) solutions to monitor for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Citrix Workspace app version via Control Panel > Programs and Features or using 'Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -like "*Citrix*"}' in PowerShellCheck Version:
Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -like "*Citrix Workspace*"} | Select-Object Name, VersionVerify Fix Applied:
Verify installed version is 2305 or later using same version check methods📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs showing privilege escalation attempts
- Citrix application logs showing unusual process creation
Network Indicators:
- Unusual outbound connections from Citrix Workspace processes
SIEM Query:
EventID=4688 AND NewProcessName="*\system32\*" AND SubjectUserName!="SYSTEM" AND ProcessName="*Citrix*"