CVE-2025-34190
BaseFortify
Publication date: 2025-09-19
Last updated on: 2025-09-29
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| vasion | virtual_appliance_application | * |
| vasion | virtual_appliance_host | * |
| apple | macos | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-306 | The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2025-34190 is an authentication bypass vulnerability in Vasion Print (formerly PrinterLogic) PrinterInstallerClientService on macOS and Linux clients. The service requires root privileges for certain administrative operations and checks this by calling geteuid(). A local attacker can preload a malicious shared object that overrides geteuid(), tricking the service into believing it has root privileges. This allows the attacker to execute administrative commands without proper authorization, effectively breaking the intended security model and enabling privilege escalation. [1]
How can this vulnerability impact me? :
This vulnerability allows a local attacker with limited privileges to bypass authentication and execute administrative commands on the affected system without proper authorization. This can lead to privilege escalation, compromise of system integrity, and potentially high impacts on confidentiality, integrity, and availability of the system. Some actions requiring write access to protected files may still fail, but the flaw undermines the security of the inter-process communication system. [1]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability involves LD_PRELOAD hooking to override the geteuid() call in the PrinterInstallerClientService. To detect exploitation attempts or presence of malicious shared objects, you can check for unusual LD_PRELOAD environment variables in processes related to PrinterInstallerClientService. For example, on Linux/macOS systems, you can run commands like: 1) ps aux | grep PrinterInstallerClientService to identify running instances; 2) sudo cat /proc/<pid>/environ | tr '\0' '\n' | grep LD_PRELOAD to check if LD_PRELOAD is set for these processes; 3) lsof -p <pid> to list loaded shared objects and verify if any suspicious libraries are loaded. Additionally, monitoring for unexpected privilege escalations or unusual administrative commands executed by PrinterInstallerClientService may indicate exploitation. [1]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include: 1) Applying any available patches or updates from the vendor once the affected version range is confirmed; 2) Restricting local user access to the PrinterInstallerClientService to trusted administrators only; 3) Disabling or limiting the use of LD_PRELOAD environment variable for processes running PrinterInstallerClientService to prevent malicious shared object injection; 4) Monitoring and auditing the service for unauthorized administrative actions; 5) Implementing system-level security controls such as SELinux or AppArmor profiles to restrict the service's capabilities and prevent unauthorized code injection. [1]