Local privilege escalation via response-file symlink following
Published Sep 19, 2025 · Updated Sep 19, 2025
Arbitrary file write in Vasion Print Application before 20.0.1923 and Virtual Appliance Host before 22.0.843 allows local users to gain root access. PrinterInstallerClient reuses a request filename under /opt/PrinterInstallerClient/tmp/responses and follows a user-created symbolic link when its privileged service writes task output. An unprivileged macOS or Linux account can redirect that write to a protected file, enabling configuration or executable replacement and local privilege escalation.
Summary
What happened
Arbitrary file write in Vasion Print Application before 20.0.1923 and Virtual Appliance Host before 22.0.843 allows local users to gain root access. PrinterInstallerClient reuses a request filename under /opt/PrinterInstallerClient/tmp/responses and follows a user-created symbolic link when its privileged service writes task output. An unprivileged macOS or Linux account can redirect that write to a protected file, enabling configuration or executable replacement and local privilege escalation.
The record
- CVE
- CVE-2025-34191
- Published
- Sep 19, 2025
- Updated
- Sep 19, 2025
- Vendor
- Vasion
- Product
- Vasion Print Application
- Classifications
- CWE-59, CWE-276, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 19, 2025CVE publishedPublication date reported by the CVE source.
- Sep 19, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=* <20.0.1923
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- PrinterInstallerClient response-path symlink overwrite demonstrationfunctional · demonstrated
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Technologies
Your stack
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Your stack
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