CVE-2021-34692
📋 TL;DR
CVE-2021-34692 is a privilege escalation vulnerability in iDrive RemotePC for Windows. Local low-privileged users can execute arbitrary code with SYSTEM privileges by manipulating the software. This affects Windows systems running vulnerable versions of RemotePC.
💻 Affected Systems
- iDrive RemotePC
📦 What is this software?
Remotepc by Idrive
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains full SYSTEM-level control of the Windows system, allowing installation of persistent malware, credential theft, and complete system compromise.
Likely Case
Local attackers escalate privileges to install ransomware, keyloggers, or backdoors, potentially leading to domain compromise in enterprise environments.
If Mitigated
With proper access controls and monitoring, exploitation would be detected and contained before significant damage occurs.
🎯 Exploit Status
Exploitation requires local access but is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.6.48 and later
Vendor Advisory: https://www.remotepc.com/release-info
Restart Required: Yes
Instructions:
1. Download RemotePC version 7.6.48 or later from the official website. 2. Run the installer to update the software. 3. Restart the system to ensure all components are updated.
🔧 Temporary Workarounds
Restrict Local User Access
windowsLimit local user accounts to only trusted personnel to reduce attack surface.
Disable RemotePC Service
windowsTemporarily disable the RemotePC service if not actively needed.
sc stop RemotePC
sc config RemotePC start= disabled
🧯 If You Can't Patch
- Implement strict least-privilege access controls for local user accounts
- Monitor for suspicious process creation events and privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check RemotePC version in Control Panel > Programs and Features. If version is below 7.6.48, the system is vulnerable.Check Version:
wmic product where name="RemotePC" get versionVerify Fix Applied:
Verify RemotePC version is 7.6.48 or higher after update and restart.📡 Detection & Monitoring
Log Indicators:
- Unexpected process execution with SYSTEM privileges
- RemotePC service spawning unusual child processes
Network Indicators:
- Unusual outbound connections from SYSTEM-level processes
SIEM Query:
EventID=4688 AND NewProcessName CONTAINS "RemotePC" AND SubjectUserName NOT IN ("SYSTEM", "LOCAL SERVICE", "NETWORK SERVICE")