non-privileged normal user passing environment variables to /bin/login [closed]

Posted by AAAAAAAA on Super User See other posts from Super User or by AAAAAAAA
Published on 2012-09-24T05:09:25Z Indexed on 2012/09/24 9:40 UTC
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Filed under:

freebsd

|

telnet

|

user-management

Suppose that in FreeBSD (or linux maybe) there is a non-privileged normal user (non-superuser). And there is a telnet standalone (I know that telnet is usually run under inetd) running under (owned by) this user. (Suppose that there was no original, root-owned telnet running.) This telnet server is programmed so that it does not check ld_* environment variables before passing it to /bin/login owned by root that has setuid set up.

The question would be: 1. Will this telnet work? 2. If it does work, will it even be able to pass environment variables to /bin/login?

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