CVE-2025-27669: Vasion Print DoS Vulnerability

CVE-2025-27669 Overview

CVE-2025-27669 is a Server-Side Request Forgery (SSRF) and Denial of Service vulnerability affecting Vasion Print (formerly PrinterLogic) Virtual Appliance and Application components. This vulnerability enables remote attackers to perform network scanning (XSPA - Cross-Site Port Attack) and potentially cause denial of service conditions against affected systems without requiring authentication.

The vulnerability stems from improper resource consumption controls (CWE-400), allowing attackers to abuse the application's network functionality to scan internal networks or exhaust system resources, leading to service disruption.

Critical Impact

Unauthenticated remote attackers can exploit this vulnerability to perform internal network reconnaissance and cause denial of service against print management infrastructure.

Affected Products

• Vasion Print (formerly PrinterLogic) Virtual Appliance Host versions before 22.0.843
• Vasion Print Application versions before 20.0.1923
• PrinterLogic Virtual Appliance (legacy naming)

Discovery Timeline

• 2025-03-05 - CVE-2025-27669 published to NVD
• 2025-04-01 - Last updated in NVD database

Technical Details for CVE-2025-27669

Vulnerability Analysis

This vulnerability combines two attack capabilities: Cross-Site Port Attack (XSPA), which is a form of Server-Side Request Forgery, and Denial of Service through resource exhaustion. The vulnerability allows unauthenticated attackers to leverage the Vasion Print application as a proxy to scan internal network resources that would otherwise be inaccessible from external networks.

The XSPA component enables attackers to map internal network infrastructure, identify open ports, and discover services running on internal systems. This reconnaissance capability can facilitate further attacks against the organization's internal resources. The DoS component allows attackers to exhaust server resources, potentially disrupting critical print management services across the enterprise.

The vulnerability is exploitable remotely over the network without requiring any authentication or user interaction, making it particularly dangerous for internet-exposed deployments.

Root Cause

The root cause is improper restriction of resource consumption (CWE-400) within the Vasion Print application. The application fails to adequately validate and restrict outbound network requests, allowing attackers to:

1. Submit crafted requests that cause the server to connect to arbitrary internal or external hosts
2. Enumerate internal network topology through response timing and error analysis
3. Exhaust system resources through excessive request handling

The vulnerability was tracked internally as OVE-20230524-0013 by the vendor.

Attack Vector

The attack is network-based and requires no privileges or user interaction. An attacker can remotely send specially crafted requests to the vulnerable Vasion Print application. The server processes these requests and attempts to connect to attacker-specified targets, enabling port scanning of internal networks.

For denial of service exploitation, attackers can overwhelm the application with requests designed to consume excessive computational resources or network bandwidth, degrading or completely disrupting print management services.

The vulnerability mechanism involves the application accepting network-related requests without proper validation, allowing attackers to manipulate the application into making outbound connections to arbitrary destinations. This enables reconnaissance of internal infrastructure and resource exhaustion attacks.

Detection Methods for CVE-2025-27669

Indicators of Compromise

• Unusual outbound connection attempts from Vasion Print servers to internal IP ranges
• High volume of failed connection attempts logged by the application
• Abnormal network traffic patterns originating from print management infrastructure
• Server resource exhaustion (CPU, memory, network connections) without corresponding legitimate workload

Detection Strategies

• Monitor network traffic from Vasion Print servers for connections to unusual internal destinations
• Implement anomaly detection for outbound connection patterns from print management systems
• Alert on connection attempts to sequential port ranges indicative of port scanning activity
• Review application logs for error messages related to failed outbound connections

Monitoring Recommendations

• Enable verbose logging on Vasion Print Virtual Appliance to capture connection attempts
• Configure network monitoring to baseline and alert on deviations in outbound traffic from print servers
• Implement rate limiting and connection tracking at the network perimeter
• Deploy SIEM rules to correlate multiple failed connection attempts from print infrastructure

How to Mitigate CVE-2025-27669

Immediate Actions Required

• Upgrade Vasion Print Virtual Appliance Host to version 22.0.843 or later immediately
• Upgrade Vasion Print Application to version 20.0.1923 or later
• Restrict network access to Vasion Print management interfaces using firewall rules
• Implement network segmentation to limit the impact of potential XSPA exploitation

Patch Information

Vasion (PrinterLogic) has released security updates addressing this vulnerability. Organizations should upgrade to:

• Virtual Appliance Host version 22.0.843 or later
• Application version 20.0.1923 or later

Detailed patch information and upgrade instructions are available in the PrinterLogic Security Bulletin.

Workarounds

• Place Vasion Print servers behind a reverse proxy with strict request filtering
• Implement egress filtering to prevent print servers from initiating connections to unauthorized destinations
• Use network segmentation to isolate print management infrastructure from sensitive internal networks
• Consider disabling any unnecessary network scanning or diagnostic features until patches can be applied
• Implement rate limiting on incoming requests to mitigate DoS potential

# Network segmentation example - restrict outbound connections from print server
# Adjust interface and IP ranges according to your environment
iptables -A OUTPUT -o eth0 -p tcp -d 10.0.0.0/8 -j DROP
iptables -A OUTPUT -o eth0 -p tcp -d 172.16.0.0/12 -j DROP
iptables -A OUTPUT -o eth0 -p tcp -d 192.168.0.0/16 -j DROP
# Allow only specific required destinations
iptables -A OUTPUT -o eth0 -p tcp -d <allowed-destination> -j ACCEPT