CVE-2024-11634: Ivanti Connect Secure RCE Vulnerability

CVE-2024-11634 Overview

CVE-2024-11634 is a command injection vulnerability affecting Ivanti Connect Secure and Ivanti Policy Secure products. This vulnerability allows a remote authenticated attacker with administrative privileges to execute arbitrary commands on the underlying system, potentially leading to complete system compromise. While the vulnerability requires authentication and elevated privileges, the ability to achieve remote code execution on network security appliances represents a significant security risk for organizations relying on these products for secure remote access.

Critical Impact

Authenticated attackers with admin privileges can achieve remote code execution on Ivanti Connect Secure and Policy Secure appliances, potentially compromising the entire VPN infrastructure and gaining persistent access to internal networks.

Affected Products

• Ivanti Connect Secure versions before 22.7R2.3
• Ivanti Policy Secure versions before 22.7R1.2
• Note: Version 9.1Rx is not affected by this vulnerability

Discovery Timeline

• 2024-12-10 - CVE-2024-11634 published to NVD
• 2025-01-17 - Last updated in NVD database

Technical Details for CVE-2024-11634

Vulnerability Analysis

This command injection vulnerability (CWE-77) exists in the administrative interface of Ivanti Connect Secure and Ivanti Policy Secure appliances. The flaw allows attackers who have already obtained administrative credentials to inject and execute arbitrary operating system commands on the underlying appliance. The attack can be performed remotely over the network without any user interaction, and successful exploitation results in full system compromise with high impact to confidentiality, integrity, and availability.

While the requirement for administrative authentication reduces the immediate attack surface, this vulnerability becomes particularly dangerous in scenarios where admin credentials have been compromised through phishing, credential stuffing, or other attack vectors. Given that Ivanti appliances serve as network perimeter devices handling sensitive VPN traffic, compromise of these systems can provide attackers with a foothold for lateral movement into protected networks.

Root Cause

The vulnerability stems from improper neutralization of special elements used in command processing (CWE-77: Command Injection). User-controlled input within the administrative interface is not properly sanitized before being passed to system-level command execution functions. This allows attackers to break out of the intended command context and inject arbitrary commands that execute with the privileges of the application.

Attack Vector

The attack vector for CVE-2024-11634 is network-based, requiring no user interaction but necessitating high privileges (administrative access) on the target appliance. An attacker would need to:

1. Obtain valid administrative credentials for the Ivanti appliance
2. Access the administrative interface over the network
3. Submit malicious input containing command injection payloads
4. The vulnerable component processes the input without proper sanitization
5. Injected commands execute on the underlying operating system

Due to the sensitive nature of this vulnerability and the absence of verified public exploit code, specific technical exploitation details are not provided. Organizations should refer to the Ivanti December 2024 Security Advisory for complete technical information.

Detection Methods for CVE-2024-11634

Indicators of Compromise

• Unusual command execution patterns originating from Ivanti appliance processes
• Unexpected outbound network connections from the Ivanti appliance to external hosts
• Anomalous administrative login activity, particularly from unfamiliar IP addresses or at unusual times
• Creation of unauthorized user accounts or modification of system configurations

Detection Strategies

• Monitor administrative interface access logs for suspicious authentication patterns and unusual request sequences
• Implement network traffic analysis to detect command-and-control communications originating from Ivanti appliances
• Deploy endpoint detection and response (EDR) solutions capable of monitoring appliance behavior for signs of command injection exploitation
• Correlate VPN appliance logs with SIEM platforms to identify potential attack patterns

Monitoring Recommendations

• Enable comprehensive logging on Ivanti Connect Secure and Policy Secure administrative interfaces
• Configure alerts for administrative authentication events, especially failed attempts followed by successful logins
• Monitor for changes to appliance configurations that were not initiated through approved change management processes
• Implement network segmentation monitoring to detect lateral movement attempts from compromised appliances

How to Mitigate CVE-2024-11634

Immediate Actions Required

• Upgrade Ivanti Connect Secure to version 22.7R2.3 or later immediately
• Upgrade Ivanti Policy Secure to version 22.7R1.2 or later immediately
• Review and audit all administrative accounts for unauthorized access or credential compromise
• Implement multi-factor authentication (MFA) for all administrative access to Ivanti appliances

Patch Information

Ivanti has released security updates addressing this vulnerability. Organizations should upgrade to the following patched versions:

• Ivanti Connect Secure: Version 22.7R2.3 or later
• Ivanti Policy Secure: Version 22.7R1.2 or later

Complete patch information and upgrade instructions are available in the Ivanti December 2024 Security Advisory. Note that version 9.1Rx is not affected by this vulnerability.

Workarounds

• Restrict administrative interface access to trusted internal networks only using firewall rules
• Implement strict IP allowlisting for administrative access to Ivanti appliances
• Enforce strong password policies and regular credential rotation for administrative accounts
• Consider deploying a privileged access management (PAM) solution to control and monitor administrative sessions

# Example: Restrict administrative access using firewall rules
# Allow admin interface access only from management network
iptables -A INPUT -p tcp --dport 443 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP

# Enable comprehensive logging for audit purposes
# Refer to Ivanti documentation for appliance-specific logging configuration