The user-password-update command in python-keystoneclient before 0.2.4 accepts the new password in the --password argument, which allows local users to obtain sensitive information by listing the process.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16937
https://bugs.launchpad.net/python-keystoneclient/+bug/938315