CVE-2025-34189 is a vulnerability classified under CWE-732 (Incorrect Permission Assignment for Critical Resource) and CWE-922 (Insecure Storage of Sensitive Information) affecting Vasion Print Virtual Appliance Host versions prior to 1.0.735 and Application versions prior to 20.0.1330, specifically in macOS and Linux client deployments. The core issue lies in the local inter-process communication (IPC) mechanism where request and response files are stored in the /opt/PrinterInstallerClient/tmp directory with overly permissive file system permissions—world-readable and world-writable. This misconfiguration allows any local user on the system to create or modify IPC request files that are subsequently processed by privileged daemons running with elevated permissions. Because these daemons trust the IPC files, maliciously crafted requests can cause the daemon to perform unauthorized actions within other user sessions, effectively breaking session isolation. This can lead to session hijacking, unauthorized command execution, and potentially impact the integrity and availability of the system. The vulnerability does not require user interaction and can be exploited by any local user with access to the system, though it does require local access. The CVSS 4.0 base score is 6.9 (medium severity), reflecting the vulnerability's moderate impact and ease of exploitation given local access. No patches or exploits are currently known, but the vendor has acknowledged the issue as V-2022-004 — Client Inter-process Security.

For European organizations, this vulnerability poses a significant risk in environments where multiple users share access to systems running vulnerable versions of Vasion Print on macOS or Linux. The ability for a local attacker to hijack sessions or execute unauthorized actions can lead to data integrity issues, disruption of printing services, and potential lateral movement within internal networks. Critical sectors such as government, finance, healthcare, and manufacturing, which rely heavily on secure printing infrastructure, could face operational disruptions and data breaches. The vulnerability undermines user session isolation, increasing the risk of insider threats or compromised accounts causing broader damage. Although remote exploitation is not possible, compromised endpoints or insider threats could leverage this vulnerability to escalate privileges or disrupt services. The lack of known exploits reduces immediate risk but should not lead to complacency given the potential impact on system availability and integrity.

To mitigate CVE-2025-34189, organizations should immediately audit and restrict permissions on the /opt/PrinterInstallerClient/tmp directory and its contents to prevent world-readable and writable access. File permissions should be set to allow only the necessary privileged daemons and system users to read/write IPC files. Implement strict user access controls and limit local user accounts on systems running Vasion Print to trusted personnel only. Employ process isolation techniques such as containerization or sandboxing for the Vasion Print services to reduce the impact of malicious IPC requests. Monitor system logs and IPC directories for unusual file creation or modification patterns indicative of exploitation attempts. Where possible, upgrade to versions of Vasion Print that address this vulnerability once patches become available. Additionally, enforce endpoint security controls to detect and prevent unauthorized local access and privilege escalation attempts. Regularly review and update security policies related to local inter-process communication and file system permissions in multi-user environments.