CVE-2024-38656: Ivanti Connect Secure RCE Vulnerability

CVE-2024-38656 Overview

CVE-2024-38656 is an argument injection vulnerability affecting Ivanti Connect Secure and Ivanti Policy Secure products. This vulnerability allows a remote authenticated attacker with administrative privileges to achieve remote code execution on affected systems. The vulnerability exists in versions of Ivanti Connect Secure before 22.7R2.2 and 9.1R18.9, as well as Ivanti Policy Secure before version 22.7R1.2.

Critical Impact

Authenticated administrators can exploit argument injection to execute arbitrary code remotely, potentially leading to complete system compromise, data exfiltration, and lateral movement within enterprise networks.

Affected Products

• Ivanti Connect Secure versions before 22.7R2.2 and 9.1R18.9
• Ivanti Policy Secure versions before 22.7R1.2
• Ivanti Connect Secure 22.7 through 22.7R2.1

Discovery Timeline

• November 13, 2024 - CVE-2024-38656 published to NVD
• June 27, 2025 - Last updated in NVD database

Technical Details for CVE-2024-38656

Vulnerability Analysis

This argument injection vulnerability (CWE-88) exists within the administrative interfaces of Ivanti Connect Secure and Ivanti Policy Secure appliances. The flaw allows an authenticated attacker with administrative privileges to inject malicious arguments into system commands executed by the application. While the attack requires administrative access, this presents a significant risk in scenarios involving compromised admin credentials, insider threats, or privilege escalation chains.

The vulnerability enables attackers to break out of intended command contexts and execute arbitrary system commands with the privileges of the underlying application service. Given that VPN appliances typically operate with elevated system privileges, successful exploitation can lead to complete compromise of the security appliance.

Root Cause

The root cause of CVE-2024-38656 is improper handling of user-supplied input when constructing command-line arguments for system operations. The application fails to adequately sanitize or validate administrative input before incorporating it into system command executions, allowing attackers to inject additional arguments or commands that alter the intended behavior of the underlying operations.

This weakness (CWE-88 - Improper Neutralization of Argument Delimiters in a Command) occurs when the application does not properly escape special characters that can be interpreted as argument delimiters or command separators by the underlying operating system or shell.

Attack Vector

The attack is network-based and targets the administrative interface of vulnerable Ivanti appliances. An attacker must first obtain valid administrative credentials through methods such as credential theft, phishing, brute force attacks, or exploitation of other vulnerabilities. Once authenticated, the attacker can leverage the argument injection flaw through specific administrative functions that construct and execute system commands.

The vulnerability manifests when specially crafted input is submitted through administrative endpoints, causing the application to execute unintended system commands. For detailed technical information about exploitation mechanics, refer to the Ivanti Security Advisory.

Detection Methods for CVE-2024-38656

Indicators of Compromise

• Unexpected administrative login attempts or sessions from unusual IP addresses or geographic locations
• Unusual process execution patterns on Ivanti appliances, particularly command shells spawning from web service processes
• Modifications to system configuration files or unauthorized changes to appliance settings
• Anomalous network connections originating from the VPN appliance to external or internal systems

Detection Strategies

• Monitor administrative authentication logs for failed login attempts, successful logins from new locations, or access during unusual hours
• Implement behavioral analysis on Ivanti appliances to detect unusual command execution patterns or process trees
• Deploy network monitoring to identify unexpected outbound connections from VPN appliances
• Review audit logs for administrative actions that include suspicious characters or command syntax

Monitoring Recommendations

• Enable verbose logging on Ivanti Connect Secure and Policy Secure appliances and forward logs to a centralized SIEM
• Configure alerts for administrative access from IP addresses not on an allowlist
• Implement file integrity monitoring on critical appliance configuration files and binaries
• Monitor for process anomalies where web server processes spawn shell commands or child processes

How to Mitigate CVE-2024-38656

Immediate Actions Required

• Update Ivanti Connect Secure to version 22.7R2.2 or 9.1R18.9 or later immediately
• Update Ivanti Policy Secure to version 22.7R1.2 or later immediately
• Audit all administrative accounts and enforce strong, unique passwords with multi-factor authentication
• Review recent administrative access logs for any suspicious activity prior to patching

Patch Information

Ivanti has released security updates that address this vulnerability. Organizations should apply the following patches as soon as possible:

• Ivanti Connect Secure: Upgrade to version 22.7R2.2 or 9.1R18.9 or later
• Ivanti Policy Secure: Upgrade to version 22.7R1.2 or later

Detailed patch information and download links are available in the Ivanti Security Advisory.

Workarounds

• Restrict administrative access to trusted IP addresses only using network-level access controls
• Implement multi-factor authentication for all administrative accounts if not already enabled
• Place Ivanti appliances behind a firewall and limit management interface exposure to dedicated management networks
• Monitor all administrative sessions in real-time and implement session recording for forensic purposes

# Example: Restrict admin access to specific IP ranges (implement at network firewall)
# Deny management interface access from untrusted networks
# Allow only from internal management VLAN
iptables -A INPUT -p tcp --dport 443 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP