CVE-2025-54445: Samsung MagicInfo 9 Server SSRF Vulnerability

CVE-2025-54445 Overview

CVE-2025-54445 is a critical XML External Entity (XXE) vulnerability affecting Samsung Electronics MagicINFO 9 Server. This vulnerability allows attackers to exploit improper restriction of XML external entity references to perform Server-Side Request Forgery (SSRF) attacks. MagicINFO 9 Server is a digital signage content management platform widely deployed in enterprise environments for managing digital displays and media content.

The vulnerability stems from inadequate XML parsing controls, enabling unauthenticated attackers to craft malicious XML payloads that can force the server to make requests to arbitrary internal or external destinations. This can lead to unauthorized access to internal systems, data exfiltration, and potential further exploitation of backend infrastructure.

Critical Impact

Unauthenticated attackers can exploit this XXE vulnerability to perform SSRF attacks, potentially accessing internal network resources, exfiltrating sensitive data, and pivoting to compromise additional systems within the network.

Affected Products

• Samsung MagicINFO 9 Server versions prior to 21.1080.0

Discovery Timeline

• 2025-07-23 - CVE-2025-54445 published to NVD
• 2025-08-15 - Last updated in NVD database

Technical Details for CVE-2025-54445

Vulnerability Analysis

This vulnerability is classified under CWE-611 (Improper Restriction of XML External Entity Reference). The XXE vulnerability occurs when the MagicINFO 9 Server XML parser processes XML input containing external entity references without proper validation or restriction. Attackers can leverage this weakness to craft specially designed XML documents that, when parsed by the vulnerable application, trigger SSRF conditions.

The combination of XXE and SSRF is particularly dangerous as it allows attackers to use the vulnerable server as a proxy to reach internal network resources that would otherwise be inaccessible from external networks. This attack vector requires no authentication and can be executed remotely over the network.

Root Cause

The root cause of CVE-2025-54445 lies in the insecure configuration of the XML parser used by MagicINFO 9 Server. The application fails to properly disable external entity processing and DTD (Document Type Definition) processing in its XML parsing routines. When XML input is processed, the parser resolves external entity references, allowing attackers to specify arbitrary URLs or file paths that the server will attempt to access.

This misconfiguration is commonly introduced when developers use default XML parser settings without implementing security hardening measures such as disabling FEATURE_EXTERNAL_GENERAL_ENTITIES, FEATURE_EXTERNAL_PARAMETER_ENTITIES, and FEATURE_LOAD_EXTERNAL_DTD features.

Attack Vector

The attack can be executed remotely over the network without requiring authentication or user interaction. An attacker crafts a malicious XML payload containing external entity declarations pointing to internal network addresses or sensitive file paths. When this payload is submitted to a vulnerable endpoint on the MagicINFO 9 Server, the XML parser processes the external entity references, causing the server to initiate requests to the attacker-specified destinations.

Typical SSRF exploitation via XXE enables attackers to scan internal networks, access cloud metadata services (such as AWS EC2 metadata at 169.254.169.254), retrieve sensitive files from the server, and interact with internal services that are not directly accessible from external networks. The vulnerability provides a powerful reconnaissance and pivoting capability for attackers targeting enterprise environments running MagicINFO 9 Server.

Detection Methods for CVE-2025-54445

Indicators of Compromise

• Unusual outbound connections from the MagicINFO 9 Server to internal IP addresses or cloud metadata endpoints
• XML payloads in HTTP requests containing <!DOCTYPE>, <!ENTITY>, or SYSTEM declarations
• Server logs showing attempts to access local files via file:// protocol or internal services
• Network traffic from the server to unexpected internal hosts or ports

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block XML payloads containing external entity declarations
• Monitor network traffic from MagicINFO 9 Server for connections to RFC 1918 private IP ranges or cloud metadata services
• Enable verbose logging on the MagicINFO 9 Server and analyze for suspicious XML parsing errors or file access attempts
• Deploy intrusion detection systems (IDS) with signatures for XXE and SSRF attack patterns

Monitoring Recommendations

• Configure alerts for outbound connections from MagicINFO 9 Server to internal network segments it should not access
• Implement DNS monitoring to detect lookups for internal hostnames originating from the server
• Review HTTP request logs for XML content with DOCTYPE or ENTITY declarations
• Monitor for unusual server resource utilization that may indicate exploitation attempts

How to Mitigate CVE-2025-54445

Immediate Actions Required

• Upgrade Samsung MagicINFO 9 Server to version 21.1080.0 or later immediately
• If immediate patching is not possible, restrict network access to the MagicINFO 9 Server administrative interfaces
• Implement network segmentation to limit the server's ability to reach sensitive internal resources
• Deploy a web application firewall with XXE detection capabilities in front of the application

Patch Information

Samsung has released a security update addressing this vulnerability in MagicINFO 9 Server version 21.1080.0. Organizations should obtain the latest security patches from the Samsung TV Security Updates portal. The patch implements proper XML parser hardening to disable external entity processing and prevent SSRF attacks.

Workarounds

• Implement strict input validation on all XML processing endpoints to reject documents containing DOCTYPE or ENTITY declarations
• Configure network firewalls to restrict outbound connections from the MagicINFO 9 Server to only necessary destinations
• Use network access control lists to prevent the server from accessing cloud metadata services and internal network resources
• Deploy a reverse proxy with XML filtering capabilities to inspect and sanitize incoming requests

# Example firewall rules to restrict SSRF (iptables)
# Block access to cloud metadata service
iptables -A OUTPUT -d 169.254.169.254 -j DROP

# Block access to internal RFC 1918 ranges from MagicINFO server
iptables -A OUTPUT -d 10.0.0.0/8 -j DROP
iptables -A OUTPUT -d 172.16.0.0/12 -j DROP
iptables -A OUTPUT -d 192.168.0.0/16 -j DROP

# Allow only necessary outbound connections (adjust as needed)
iptables -A OUTPUT -p tcp --dport 443 -j ACCEPT
iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT