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Apache OpenOffice Advisory
Title: Windows Installer Can Enable Privileged Trojan Execution
Announced October 11, 2016
The Apache OpenOffice installer for Windows 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 administrator 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.
There are no known exploits of this vulnerability.
A proof-of-concept demonstration exists.
Vendor: The Apache Software Foundation
All Apache OpenOffice versions 4.1.2 and older
are affected. Old OpenOffice.org versions are also
Install Apache OpenOffice 4.1.3 for the latest maintenance and
cumulative security fixes. Use <https://www.openoffice.org/download/>.
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 precautions are also
recommended as protection against other software that may
have the unquoted search path 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.
For additional information and assistance, consult the Apache
OpenOffice Community Forums, <https://forum.openoffice.org/> or
make requests to the <mailto:us...@openoffice.apache.org> public
mailing list. Defects not involving suspected security
vulnerabilities can be reported via
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.
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