Full Disclosure mailing list archives

Re: Partial Solution to SUID Problems


From: Markus Friedl <markus () openbsd org>
Date: Sun, 7 Dec 2003 15:48:03 +0100

On a server that you have shell access, you probably really need to add
'passwd' to the 'suid partitiion'.  You may need some other things,
on some of our servers, I have 'ping' as well.

it's not really necessary to have passwd setuid.  
you just can write a passwd server process and the passwd(8)
just talks to this server via unix domain sockets.  the server
can use getpeereid(2) or a similar machanism to figure
out the uid of the connecting user (dugsong has implemented
this).

similar things can be done for ping (just used fd passing
to get a raw socket).

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