[Bug 456182] Review Request: rssh - Restricted shell for use with OpenSSH, allowing only scp and/or sftp

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https://bugzilla.redhat.com/show_bug.cgi?id=456182





--- Comment #18 from Derek Martin <code@xxxxxxxxxxxxxx>  2008-10-28 14:35:48 EDT ---
Some additional examples of badness that can occur if rssh is listed in
/etc/shells:

A malicious user could walk up to someone's terminal while they are away (or
even not looking), quickly run chsh (setting it to rssh), and log the user out,
effectively denying them login access to the machine.

GDM will populate the user browser with an entry for that user, despite the
fact that they will be unable to log in.

Sendmail may allow users to execute arbitrary programs via .forward if their
shell is rssh and it is listed in /etc/shells.

getusershell() will return incorrect information about which shells are valid
login shells.

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