Overview
CVE-2025-34191 is an identified vulnerability in Vasion Print Virtual Appliance Host and Applications, previously known as PrinterLogic. This vulnerability involves an arbitrary file write issue that can potentially escalate to a full system compromise. It affects previous versions of the software, specifically versions prior to 22.0.843 for the host and prior to 20.0.1923 for macOS/Linux client deployments. This issue is critical as it allows an unprivileged user to overwrite or create arbitrary files on the system, leading to potential data leakage or system compromise.
Vulnerability Summary
CVE ID: CVE-2025-34191
Severity: High (8.4 CVSS Severity Score)
Attack Vector: Local
Privileges Required: None
User Interaction: None
Impact: Potential full system compromise and data leakage
Affected Products
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Product | Affected Versions
Vasion Print Virtual Appliance Host | Prior to 22.0.843
Vasion Print Applications (macOS/Linux) | Prior to 20.0.1923
How the Exploit Works
The vulnerability lies in the response file handling of the Vasion Print service. When tasks generate output, the service writes this response data into files under the directory ‘/opt/PrinterInstallerClient/tmp/responses/’ and uses the requested filename. The problem arises as the service follows symbolic links located in the responses directory and writes as the service user, which typically has root privilege. An unprivileged user could exploit this to cause the service to overwrite or create arbitrary files on the filesystem as root, thereby achieving local privilege escalation and potentially compromising the whole system.
Conceptual Example Code
The following is a conceptual example of how this vulnerability could be exploited:
# Create a symbolic link to a sensitive file
ln -s /etc/passwd /opt/PrinterInstallerClient/tmp/responses/mylink
# Trigger a task that generates output with the filename "mylink"
# The service would overwrite /etc/passwd with its outputThis could potentially be used to modify critical configuration files, replace or inject malicious binaries, or perform other actions leading to full system compromise. Ensure to apply the necessary patches provided by the vendor or use Web Application Firewall (WAF) or Intrusion Detection Systems (IDS) as temporary mitigation.
