OpenText Brava! Enterprise and Brava! Server Components Sensitive Data Exposure

[luke.bailiff () ipers org]

Vulnerable Application:  Brava! Enterprise and Brava! Server Components

Affected Versions:  Brava! Enterprise and Brava! Server Components have this as the default configuration, from Brava! 
7.5 to the latest Brava! 16.4 on Windows.

Not Affected Versions: Linux installs do not automatically create the share.  

Potential Security Impact: Sensitive Data Exposure

If the files within your implementation are sensitive, this may expose sensitive data to unauthorized users.  Limiting 
SMB access will help mitigate this vulnerability as well.  

Since the default permissions allow for modify access of the files, there is some potential against the integrity of 
the file as the user is viewing it, but this has not been explored.


Vulnerability Description: During the installation of Brava! Enterprise and Brava! Server Components, a file share is 
created on the windows server called "displaylistcache" with full read and write permissions for the everyone group at 
both the NTFS and Share levels.  The share is used to retrieve documents for processing, and to store processed 
documents for display in the browser. This is the default behavior of the install. The only required share level access 
is read/write by the JobProcessor service account. At the local filesystem level, the only additional required 
permissions would be read/write from the servlet engine (typically Tomcat).  The affected server components are not 
installed with Content Server by default, and must be installed separately.


Remediation:  Review your OpenText install to see if you are affected.  If affected, update permissions on the 
displaylistcache share and local level to allow only the servlet engine (typically tomcat) and the JobProcessor service 
accounts access.  

Vendor declined to update the installer behavior, but has updated their documentation.

Vendor comment:   
Our default Brava! Enterprise/Brava! Server Components installer is intended to be used as a starting point for 
implementation within your environment. We do provide guidelines within our documentation on how to harden the Brava! 
Enterprise web application/server and expect that the documentation be reviewed during installation and configuration. 
Our documentation does include information on the requirements of the displaylistcache share, but because each customer 
will have different infrastructure-based considerations, which would be overwhelming to thoroughly document, we only 
offer general guidance.  We continually evaluate our documentation over time and lately have updated our "Security 
Considerations" documentation to add more clarity around the requirements of a displaylistcache configuration.