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Released: Apache OpenOffice 4.1.15


Apache OpenOffice Advisory

Windows Installer Can Enable Privileged Trojan Execution

Version 1.0

Announced October 11, 2016


The Apache OpenOffice installer for Winodws contained a defective operation that could trigger execution of unwanted software installed by a Trojan Horse application. The installer defect is known as an "unquoted Windows search path vulnerability."

In the case of Apache OpenOffice installers for Windows, the PC must have previously been infected by a Trojan Horse application (or user) running with administrative privilege. Any installer with the unquoted search path vulnerability becomes a delayed trigger for the exploit. The exploit may already have operated on the user's PC.

Severity: Medium

There are no known exploits of this vulnerabilty.
A proof-of-concept demonstration exists.

Vendor: The Apache Software Foundation

Versions Affected

All Apache OpenOffice versions 4.1.2 and older are affected. versions are also affected.


Install Apache OpenOffice 4.1.3 for the latest maintenance and cumulative security fixes. Use the Apache OpenOffice download page.

If instead of a typical installation you use a custom-installation option to change the location where Apache OpenOffice is installed, use a location that has no spaces in its full-path name.

Defenses and Work-Arounds

If you are unable to update to 4.1.3, there are other precautions that can be taken. These precausions are also recommended as protection against other software that may have the vulnerability.

Ensure that there are no programs installed at the top-level folder (usually C:\) where Windows is installed. All are dangerous, especially ones named "Program", whether "Program.exe" or some other variation.

If such programs are found, install or update to current anti-virus/-malware software. Perform a complete system scan. The scan may provide for removal of programs where there should not be any. If that does not happen, it is necessary to remove any Program.exe and others manually using administrator privilege.

Further Information

For additional information and assistance, consult the Apache OpenOffice Community Forums, or make requests to the public mailing list. Defects not involving suspected security vulnerabilities can be reported with a normal issue via Bugzilla.

The latest information on Apache OpenOffice security bulletins can be found at the Bulletin Archive page.


The Apache OpenOffice project acknowledges the reporting and analysis for CVE-2016-6803 by Cyril Vallicari.

Security Home -> Bulletin -> CVE-2016-1513

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