CVE-2023-39336: Ivanti Endpoint Manager SQLi Vulnerability

CVE-2023-39336 Overview

CVE-2023-39336 is a SQL Injection vulnerability affecting Ivanti Endpoint Manager versions released prior to 2022 SU 5. This vulnerability allows an attacker with access to the internal network to execute arbitrary SQL queries and retrieve sensitive output without requiring authentication. Under specific circumstances, successful exploitation may also lead to Remote Code Execution (RCE) on the core server, significantly amplifying the potential impact.

Critical Impact

Unauthenticated attackers on the adjacent network can execute arbitrary SQL queries, potentially leading to data exfiltration, database manipulation, and in certain scenarios, full Remote Code Execution on the Ivanti EPM core server.

Affected Products

• Ivanti Endpoint Manager versions prior to 2022
• Ivanti Endpoint Manager 2022 (base version)
• Ivanti Endpoint Manager 2022 SU1 through SU4

Discovery Timeline

• 2024-01-09 - CVE-2023-39336 published to NVD
• 2025-06-03 - Last updated in NVD database

Technical Details for CVE-2023-39336

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) exists in an unspecified component of Ivanti Endpoint Manager. The flaw stems from insufficient input validation and improper sanitization of user-supplied data before it is incorporated into SQL queries. Attackers positioned on the adjacent network can craft malicious requests containing SQL syntax that gets interpreted and executed by the underlying database engine.

The vulnerability is particularly concerning because it requires no authentication to exploit. An attacker simply needs network adjacency to the vulnerable Ivanti EPM server. Upon successful exploitation, the attacker can execute arbitrary SQL commands against the database, enabling data extraction, modification, or deletion. In certain deployment configurations, this SQL Injection can be chained to achieve Remote Code Execution on the core server, potentially allowing complete system compromise.

Root Cause

The root cause of CVE-2023-39336 is improper input validation (CWE-89: Improper Neutralization of Special Elements used in an SQL Command). User-controlled input is directly concatenated or insufficiently parameterized within SQL queries, allowing malicious SQL syntax to alter query logic. The lack of authentication checks on the vulnerable endpoint compounds the severity, enabling any adjacent network attacker to exploit the flaw.

Attack Vector

The attack requires the adversary to have access to the internal network where the Ivanti Endpoint Manager server resides. From this position, the attacker can send crafted HTTP requests containing SQL injection payloads to the vulnerable endpoint. The malicious input bypasses any existing input validation and is processed by the database engine, returning query results to the attacker. In specific configurations involving xp_cmdshell or similar extended stored procedures, the SQL Injection can be escalated to execute operating system commands on the core server.

The attack does not require user interaction, authentication credentials, or elevated privileges—making it highly exploitable once network access is achieved. Organizations with flat network architectures or insufficient network segmentation face elevated risk.

Detection Methods for CVE-2023-39336

Indicators of Compromise

• Unusual SQL error messages in Ivanti EPM application or web server logs indicating malformed queries
• Database audit logs showing unexpected SELECT, INSERT, UPDATE, or DELETE operations from the EPM application context
• Evidence of xp_cmdshell, sp_oacreate, or other extended stored procedures being invoked unexpectedly
• Anomalous network traffic patterns to the Ivanti EPM server from internal hosts

Detection Strategies

• Deploy database activity monitoring to detect SQL injection patterns such as UNION SELECT, comment sequences (--, /**/), or time-based blind injection indicators
• Implement Web Application Firewall (WAF) rules to inspect and block requests containing common SQL injection payloads targeting Ivanti EPM endpoints
• Enable comprehensive logging on the Ivanti EPM server and forward logs to a SIEM for correlation and alerting
• Monitor for process spawning from the SQL Server service account that could indicate RCE exploitation

Monitoring Recommendations

• Establish baseline network behavior for the Ivanti EPM server and alert on deviations, particularly unusual outbound connections
• Regularly review database audit logs for queries that deviate from expected application patterns
• Configure alerts for failed authentication attempts or access to sensitive database objects from the EPM service account

How to Mitigate CVE-2023-39336

Immediate Actions Required

• Apply Ivanti Endpoint Manager 2022 SU 5 or later immediately to remediate this vulnerability
• Restrict network access to the Ivanti EPM server to only authorized management workstations and systems
• Implement network segmentation to limit lateral movement and reduce the attack surface from compromised adjacent hosts
• Review database permissions and ensure the EPM service account follows least privilege principles

Patch Information

Ivanti has addressed CVE-2023-39336 in Ivanti Endpoint Manager 2022 Service Update 5 (SU 5). Organizations running any version prior to 2022 SU 5 should upgrade immediately. Refer to the Ivanti Security Advisory SA-2023-12-19 for official patch details and download instructions.

Workarounds

• If immediate patching is not feasible, implement strict network access controls to limit connectivity to the Ivanti EPM server from untrusted network segments
• Deploy a Web Application Firewall (WAF) with SQL injection detection rules in front of the Ivanti EPM web interface
• Consider disabling or restricting dangerous SQL Server extended stored procedures such as xp_cmdshell to limit RCE potential
• Increase database logging verbosity and monitoring to detect exploitation attempts while working toward patching

# Example: Restrict network access to Ivanti EPM server using Windows Firewall
# Allow only authorized management subnet (example: 10.0.50.0/24)
netsh advfirewall firewall add rule name="Restrict EPM Access" dir=in action=allow remoteip=10.0.50.0/24 protocol=tcp localport=443
netsh advfirewall firewall add rule name="Block EPM from Other Networks" dir=in action=block protocol=tcp localport=443