CVE-2024-7399: Samsung MagicInfo 9 Path Traversal Flaw

CVE-2024-7399 Overview

CVE-2024-7399 is a path traversal vulnerability in Samsung MagicINFO 9 Server versions before 21.1050. The flaw stems from improper limitation of a pathname to a restricted directory [CWE-22]. Attackers can write arbitrary files with system authority over the network without authentication or user interaction. CISA added the CVE to its Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. The vulnerability affects the file upload handler used by the centralized digital signage management platform, which is widely deployed in retail, hospitality, and corporate environments.

Critical Impact

Unauthenticated remote attackers can write arbitrary files as SYSTEM, leading to remote code execution and full server compromise on Samsung MagicINFO 9 Server deployments.

Affected Products

• Samsung MagicINFO 9 Server, all versions prior to 21.1050
• Deployments exposing the MagicINFO web management interface to untrusted networks
• Centralized digital signage environments using MagicINFO 9 for content distribution

Discovery Timeline

• 2024-08-12 - CVE-2024-7399 published to NVD
• 2026-04-24 - Last updated in NVD database

Technical Details for CVE-2024-7399

Vulnerability Analysis

The vulnerability resides in a file upload endpoint of the MagicINFO 9 Server web application. The server fails to properly sanitize user-supplied filename or path parameters, allowing directory traversal sequences such as ../ to escape the intended upload directory. An unauthenticated attacker submits a crafted multipart HTTP request that places a file at an attacker-controlled location on the server filesystem. Because the MagicINFO service runs with SYSTEM privileges on Windows, the file is written with full administrative authority.

The documented exploitation pattern, reported by Arctic Wolf, involves uploading a .jsp web shell into a directory served by the embedded Tomcat instance. Attackers then request the uploaded shell via HTTP to obtain remote command execution. From this foothold, adversaries can deploy persistence mechanisms, exfiltrate data, or pivot into the broader network.

Root Cause

The root cause is missing canonicalization and validation of file path inputs in the upload handler. The application concatenates user-supplied path components with a base directory without resolving traversal sequences or restricting writes to an allowlisted directory tree.

Attack Vector

Exploitation requires only network access to the MagicINFO 9 Server HTTP interface. No credentials or user interaction are required. Attackers craft a single HTTP POST request containing a traversal payload and arbitrary file contents. See the Arctic Wolf analysis of CVE-2024-7399 for documented exploitation patterns observed in the wild.

Detection Methods for CVE-2024-7399

Indicators of Compromise

• Presence of unexpected .jsp, .war, or executable files within MagicINFO web-accessible directories such as the Tomcat webapps folder
• HTTP POST requests to MagicINFO upload endpoints containing ..\ or ../ sequences in filename parameters
• New child processes spawned by the MagicINFO or Tomcat service account, particularly cmd.exe, powershell.exe, or certutil.exe
• Outbound connections from the MagicINFO server to unfamiliar IP addresses following file upload activity

Detection Strategies

• Inspect web server access logs for upload requests containing path traversal patterns or unusual file extensions
• Monitor file integrity on the MagicINFO installation directory and any Tomcat-served paths for unauthorized writes
• Hunt for web shell behavior such as Java or Tomcat processes invoking shell interpreters
• Correlate HTTP requests to newly created files with subsequent process execution on the host

Monitoring Recommendations

• Enable verbose access logging on the MagicINFO HTTP listener and forward logs to a centralized analytics platform such as Singularity Data Lake for retention and search
• Deploy endpoint protection on MagicINFO servers to surface anomalous process lineage from the service account; Singularity Endpoint uses behavioral AI to flag SYSTEM-level processes spawning shells from web service contexts
• Alert on creation of script or executable files within Tomcat web application directories

How to Mitigate CVE-2024-7399

Immediate Actions Required

• Upgrade Samsung MagicINFO 9 Server to version 21.1050 or later immediately
• Restrict network access to the MagicINFO management interface using firewall rules or VPN-only access
• Audit MagicINFO server filesystems for unauthorized files in web-accessible directories and remove any web shells found
• Rotate credentials and secrets that may have been exposed on a compromised MagicINFO host

Patch Information

Samsung addressed the vulnerability in MagicINFO 9 Server version 21.1050. Refer to the official Samsung Security Updates portal for download and release information. The patch corrects the file path validation logic in the affected upload handler.

Workarounds

• Block external access to the MagicINFO HTTP/HTTPS listener at the network perimeter until patching is complete
• Place the MagicINFO server behind a reverse proxy or web application firewall that rejects requests containing path traversal sequences
• Run the MagicINFO service under a least-privilege account where supported, instead of SYSTEM, to limit blast radius

# Example WAF/reverse proxy rule to drop traversal sequences in upload requests
# nginx snippet
location /MagicInfo/ {
    if ($request_uri ~* "\.\./|\.\.%2f|\.\.\\\\") {
        return 403;
    }
    proxy_pass http://magicinfo_backend;
}