[mapserver-announce] Security Advisory – Limiting Mapfile Access

[Jeff McKenna]

This is an important reminder that, as part of a secure deployment, it 
is important to limit MapServer CGI access to mapfiles. The MapServer 
CGI has long supported the use of environment variables as a primary 
mechanism to do this. If you haven’t implemented these controls then 
that constitutes undue risk that is easily mitigated and we strongly 
encourage you to do so as soon as possible. It’s also a great time to 
review those settings if you already have them in place as we’ve 
recently updated regex examples related to MS_MAP_PATTERN to limit path 
traversal.

Relevant documentation can be found at:

   * Limit Mapfile Access: 
https://mapserver.org/optimization/limit_mapfile_access.html
   * Environment Variables: https://mapserver.org/environment_variables.html

Please don’t hesitate to reach out with questions.

(please also distribute this advisory to your networks, with this url: 
https://mapserver.org/announcements/2021-03-30-limit-mapfile-access.html )

--the MapServer PSC





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