CVE request: mongodb: world-readable .dbshell history file

[Sébastien Delafond <seb () debian org>]

Hello,

from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=832908:

,----
| During the report on redis-tools
| (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=832460), lamby@
| linked to a codesearch and the same bug was found in mongodb-clients.
| 
| mongodb-clients stores its history in ~/.dbshell, this file is created
| with permissions 0644. Home folders are world readable as well in
| debian, so any user can access other users mongodb history, even though
| db.auth commands don't appear to be logged like redis did.
| 
| I filed a bug on upstream as well:
| https://jira.mongodb.org/browse/SERVER-25335
`----

The mongodb client doesn't store authentication commands, but there's
still information leakage, though, even if only about database and
collection names, or data structure.

As for data itself, the history could also contain sensitive
information; for instance, if usernames for some other service were
stored in a mongo collection, the history could contain lines like:

  db.users.find({user:"foo"})

or even:

  db.users.update({user:"foo"},{$set:{password:"OhComeOnNow"}})

Cheers,

--Seb