CVE-2022-25249: PTC Axeda Agent Path Traversal Flaw

CVE-2022-25249 Overview

CVE-2022-25249 is a directory traversal vulnerability affecting PTC Axeda agent (all versions) and Axeda Desktop Server for Windows (all versions), with the exception of Axeda agent versions v6.9.2 and v6.9.3. This vulnerability allows remote unauthenticated attackers to obtain file system read access via the web server when connecting to a specific port.

Critical Impact

Remote unauthenticated attackers can exploit this directory traversal vulnerability to read arbitrary files from the file system, potentially exposing sensitive configuration data, credentials, and other confidential information stored on affected systems.

Affected Products

• PTC Axeda Agent (all versions except v6.9.2 and v6.9.3)
• PTC Axeda Desktop Server for Windows (all versions)
• Industrial IoT devices and systems utilizing Axeda remote access components

Discovery Timeline

• March 16, 2022 - CVE-2022-25249 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2022-25249

Vulnerability Analysis

This directory traversal vulnerability (CWE-22) exists within the web server component of PTC Axeda agent and Axeda Desktop Server for Windows. The flaw allows attackers to manipulate file path inputs to escape the intended directory structure and access files outside the web root. Since the vulnerability requires no authentication and can be exploited remotely over a network connection, it presents a significant risk for organizations using these IoT management tools in production environments.

The Axeda platform is commonly deployed in industrial and healthcare IoT environments for remote device management, making unauthorized file access particularly concerning as it may expose device configurations, network credentials, or other sensitive operational data.

Root Cause

The root cause of this vulnerability is improper validation of user-supplied file path inputs within the web server component. The application fails to properly sanitize path traversal sequences (such as ../ patterns) before processing file requests. This allows attackers to construct malicious requests that navigate outside the intended web directory to access arbitrary files on the file system.

Attack Vector

The attack can be executed remotely over the network without requiring any authentication or user interaction. An attacker connects to the vulnerable port exposed by the Axeda agent or Desktop Server and sends specially crafted HTTP requests containing directory traversal sequences. The web server processes these malicious paths, allowing the attacker to read files from locations outside the web root directory.

The exploitation process involves:

1. Identifying a target system running vulnerable Axeda software
2. Connecting to the web server port
3. Sending HTTP requests with path traversal sequences (e.g., ../../etc/passwd or ..\..\..\windows\system.ini)
4. Receiving the contents of files from arbitrary locations on the file system

Due to the nature of the vulnerability, attackers can systematically enumerate and exfiltrate sensitive files including configuration files, logs, credentials, and other sensitive data accessible to the Axeda service account.

Detection Methods for CVE-2022-25249

Indicators of Compromise

• HTTP requests to Axeda web server ports containing path traversal sequences such as ../, ..\, or URL-encoded variants
• Unusual access patterns to the Axeda agent web interface from external or unexpected IP addresses
• Log entries showing file access attempts outside normal web application directories
• Network traffic containing suspicious file path patterns targeting system files or configuration directories

Detection Strategies

• Deploy network intrusion detection rules to identify HTTP requests containing directory traversal sequences targeting Axeda services
• Monitor web server logs for requests with ../ or encoded path traversal patterns in URI parameters
• Implement SentinelOne endpoint detection to identify suspicious file access attempts by Axeda processes to sensitive system locations
• Use web application firewall (WAF) rules to block requests containing known path traversal patterns

Monitoring Recommendations

• Establish baseline network traffic patterns for Axeda agent communications and alert on anomalies
• Configure file integrity monitoring on critical system files and directories that may be targeted
• Enable detailed logging on Axeda services and centralize logs for security analysis
• Monitor for lateral movement following potential reconnaissance via file system access

How to Mitigate CVE-2022-25249

Immediate Actions Required

• Upgrade PTC Axeda agent to version v6.9.2 or v6.9.3 which are not affected by this vulnerability
• Restrict network access to Axeda agent and Desktop Server ports using firewall rules to limit exposure
• Implement network segmentation to isolate IoT management infrastructure from general network access
• Review and audit access logs for any signs of prior exploitation attempts

Patch Information

PTC has released patched versions addressing this vulnerability. Organizations should upgrade to Axeda agent version v6.9.2 or later. For detailed patch information and upgrade instructions, refer to the PTC Support Article CS363561 and the CISA ICS Advisory ICSA-22-067-01.

Workarounds

• Implement strict firewall rules to block external access to Axeda service ports
• Deploy a reverse proxy or web application firewall with path traversal detection capabilities in front of Axeda services
• Consider disabling the web server component if not required for operational needs
• Use VPN or other secure remote access methods instead of exposing Axeda ports directly to networks

# Example firewall configuration to restrict Axeda access
# Allow only specific trusted IP addresses to access Axeda ports
iptables -A INPUT -p tcp --dport 56120 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 56120 -j DROP