CVE-2025-27685: Vasion Print Information Disclosure Flaw

CVE-2025-27685 Overview

CVE-2025-27685 is a sensitive data exposure vulnerability affecting Vasion Print (formerly known as PrinterLogic) that allows configuration files to contain Certificate Authority (CA) certificates and private keys. This insecure storage practice exposes critical cryptographic material to unauthorized access, potentially enabling attackers to forge certificates, intercept encrypted communications, or impersonate trusted systems.

The vulnerability is classified under CWE-312 (Cleartext Storage of Sensitive Information), indicating that sensitive cryptographic assets are stored without adequate protection. This affects Vasion Print Virtual Appliance Host versions before 1.0.735 and Application versions before 20.0.1330.

Critical Impact

Exposure of CA certificates and private keys in configuration files could allow attackers to perform man-in-the-middle attacks, impersonate legitimate servers, or compromise the entire PKI trust chain within affected environments.

Affected Products

• Vasion Print (formerly PrinterLogic) Application versions before 20.0.1330
• Vasion Print Virtual Appliance Host versions before 1.0.735
• PrinterLogic Virtual Appliance deployments

Discovery Timeline

• 2025-03-05 - CVE-2025-27685 published to NVD
• 2025-11-03 - Last updated in NVD database

Technical Details for CVE-2025-27685

Vulnerability Analysis

This vulnerability represents a fundamental security design flaw where highly sensitive cryptographic material—specifically CA certificates and their associated private keys—is stored within application configuration files. Such storage practices violate the principle of least privilege and secure key management best practices.

When CA private keys are exposed, the impact extends beyond simple credential theft. An attacker with access to these keys gains the ability to sign arbitrary certificates that will be trusted by systems configured to trust that CA. This effectively undermines the entire certificate-based trust model for affected deployments.

The vulnerability was tracked internally by the vendor as V-2022-001, suggesting it was identified in their internal security audit process. The flaw exists in the Virtual Appliance configuration, where sensitive cryptographic material is stored in an accessible location without proper encryption or access controls.

Root Cause

The root cause of CVE-2025-27685 is the insecure storage of sensitive cryptographic material in configuration files. Specifically, the application stores Certificate Authority certificates and their private keys in cleartext within configuration files that may be accessible to unauthorized users or processes. This violates secure key management principles which mandate that private keys should be stored in hardware security modules (HSMs), encrypted key stores, or at minimum, files with strict access controls and encryption.

Attack Vector

The vulnerability is exploitable over the network with low attack complexity and requires no authentication or user interaction. An attacker who gains access to the configuration files—whether through another vulnerability, misconfiguration, or legitimate but excessive access—can extract the CA certificate and private key.

With these cryptographic assets, an attacker could:

1. Generate trusted certificates - Sign malicious certificates that will be trusted by all systems in the PKI hierarchy
2. Perform man-in-the-middle attacks - Intercept and decrypt TLS communications using forged certificates
3. Impersonate servers - Create convincing fake servers that clients will trust
4. Compromise audit integrity - Sign fraudulent logs or documents

The attack primarily impacts confidentiality as indicated by the CVSS vector, with high impact to confidentiality and no direct impact to integrity or availability.

Detection Methods for CVE-2025-27685

Indicators of Compromise

• Unauthorized access attempts to configuration directories containing CA certificates and private keys
• Unexpected certificate issuance from the compromised CA
• TLS/SSL certificate warnings in client applications that were previously trusted
• Anomalous file access patterns to PrinterLogic Virtual Appliance configuration files

Detection Strategies

• Monitor file access events on configuration directories within PrinterLogic Virtual Appliance installations for unauthorized read operations
• Implement certificate transparency logging to detect unauthorized certificate issuance from your CA
• Deploy SentinelOne Singularity agents on Virtual Appliance hosts to detect suspicious file access and exfiltration attempts
• Review network traffic for certificate-based authentication anomalies that could indicate compromised credentials

Monitoring Recommendations

• Enable comprehensive audit logging for all access to cryptographic key storage locations
• Configure alerts for any new certificate issuance from the potentially compromised CA
• Monitor for lateral movement attempts that could leverage compromised certificates for authentication
• Use SentinelOne's behavioral AI to detect exploitation attempts targeting the vulnerable configuration files

How to Mitigate CVE-2025-27685

Immediate Actions Required

• Upgrade Vasion Print Virtual Appliance Host to version 1.0.735 or later immediately
• Upgrade Vasion Print Application to version 20.0.1330 or later
• Rotate all CA certificates and private keys that may have been exposed in vulnerable configurations
• Audit certificate issuance logs to identify any potentially fraudulent certificates issued using compromised keys
• Revoke and replace any certificates signed by potentially compromised CA keys

Patch Information

Vasion (formerly PrinterLogic) has released security patches addressing this vulnerability in Virtual Appliance Host version 1.0.735 and Application version 20.0.1330. Organizations should consult the PrinterLogic Security Bulletins for detailed upgrade instructions and additional security guidance.

For comprehensive technical analysis of this vulnerability and related issues, refer to the Pierre Kim security research blog which documents this and 82 other vulnerabilities discovered in Vasion PrinterLogic products.

Workarounds

• Restrict network access to Virtual Appliance management interfaces using network segmentation and firewall rules
• Implement strict file system permissions on configuration directories to limit access to only essential service accounts
• If possible, migrate CA certificates and private keys to a hardware security module (HSM) or encrypted key store pending the patch deployment
• Deploy additional monitoring on systems with access to the configuration files to detect potential exfiltration

# Restrict access to configuration files (temporary mitigation)
# Identify and secure configuration directories
chmod 600 /path/to/printerlogic/config/*
chown root:root /path/to/printerlogic/config/*

# Verify file permissions after applying
ls -la /path/to/printerlogic/config/