CVE-2022-1399: Device42 CMDB RCE Vulnerability

CVE-2022-1399 Overview

CVE-2022-1399 is an Argument Injection or Modification vulnerability affecting the Device42 CMDB appliance. The vulnerability exists in the "Change Secret" username field within the Discovery component, allowing attackers to inject malicious arguments that result in arbitrary code execution with root privileges on the affected appliance.

Critical Impact

Successful exploitation of this vulnerability enables attackers to execute arbitrary code with root-level privileges, potentially leading to complete system compromise, data theft, and persistent access to the Device42 CMDB infrastructure.

Affected Products

• Device42 CMDB version 18.01.00
• Device42 CMDB versions prior to 18.01.00

Discovery Timeline

• 2022-08-17 - CVE-2022-1399 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-1399

Vulnerability Analysis

This vulnerability stems from improper handling of user-supplied input in the "Change Secret" username field within the Discovery component of Device42 CMDB. The application fails to properly sanitize or validate arguments passed through this field, creating an argument injection vector (CWE-88).

When a user modifies the username field in the Change Secret functionality, the input is passed to underlying system commands without adequate sanitization. An attacker can craft malicious input containing shell metacharacters or additional command arguments that are then interpreted by the system shell, effectively allowing command injection through argument manipulation.

The vulnerability is particularly severe because the affected component runs with elevated privileges, meaning any injected commands execute with root-level access on the appliance.

Root Cause

The root cause of CVE-2022-1399 is insufficient input validation and improper neutralization of special elements used in an argument to a system command. The Discovery component's Change Secret functionality constructs system commands using user-provided input from the username field without properly escaping or sanitizing special characters. This allows attackers to inject additional arguments or commands that modify the intended behavior of the underlying system operations.

Attack Vector

The attack vector for this vulnerability is network-based, requiring authenticated access with high privileges. An attacker with valid credentials to the Device42 CMDB administrative interface can navigate to the Discovery component and manipulate the username field in the Change Secret functionality. By inserting specially crafted input containing shell metacharacters or argument separators, the attacker can inject additional commands or arguments that execute on the underlying system.

The attack flow typically involves:

1. Authenticating to the Device42 CMDB administrative interface
2. Navigating to the Discovery component's Change Secret functionality
3. Entering malicious payload in the username field containing argument injection sequences
4. Triggering the operation to execute the injected commands with root privileges

For detailed technical analysis of this vulnerability, see the Bitdefender Red Team Analysis.

Detection Methods for CVE-2022-1399

Indicators of Compromise

• Unusual or unexpected processes spawned by the Device42 application services running with root privileges
• Suspicious entries in application logs showing malformed usernames with shell metacharacters or command sequences
• Unexpected modifications to system files or configurations on the Device42 appliance
• Network connections originating from the Device42 appliance to unknown external destinations

Detection Strategies

• Implement application-layer logging to capture all input to the Change Secret username field and alert on special characters or argument patterns
• Deploy file integrity monitoring on the Device42 appliance to detect unauthorized system modifications
• Monitor process creation events for child processes of Device42 services executing unexpected commands
• Analyze authentication logs for accounts attempting to access the Discovery component's Change Secret functionality

Monitoring Recommendations

• Enable verbose logging for the Device42 Discovery component and forward logs to a centralized SIEM
• Configure alerts for any command execution patterns indicative of argument injection attempts
• Implement network segmentation to limit the blast radius of a compromised Device42 appliance
• Regularly audit administrative access to the Device42 CMDB interface

How to Mitigate CVE-2022-1399

Immediate Actions Required

• Update Device42 CMDB to a version newer than 18.01.00 that addresses this vulnerability
• Restrict network access to the Device42 administrative interface to trusted IP addresses only
• Review and limit administrative privileges to only essential personnel
• Implement additional network segmentation around the Device42 appliance

Patch Information

Organizations should update to a version of Device42 CMDB that includes the security fix for this argument injection vulnerability. Contact Device42 support or consult their official documentation for the specific patched version and upgrade procedures. Review the Bitdefender Red Team Analysis for additional context on the vulnerability and recommended mitigations.

Workarounds

• Implement strict input validation at the network perimeter using a Web Application Firewall (WAF) to filter malicious patterns in requests to the Device42 interface
• Disable or restrict access to the Discovery component's Change Secret functionality until patching is complete
• Enable enhanced logging and monitoring to detect exploitation attempts while awaiting the update
• Consider running the Device42 appliance in an isolated network segment with strict egress filtering