OSEC

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Subject: Re: AW: [suse-security] pt0 device permissions
From: Roman Drahtmueller (drahtuni-freiburg.de)
Date: Tue Feb 15 2000 - 13:07:47 CST

Michael,

> so: why can i do "ls", "mkdir", "xterm", ... as root, but not
> as a normal user?
>
> more strange things: "ps", "w", "less" and even "top" work ok,
> "cat" (!) crashes. "finger" runs perfectly, "who" crashes.

This sounds like a library problem to me. Check permissions in /lib,
/usr/lib as well as all directories listed in /etc/ld.so.conf (both
directory and file permissions), make sure that _everything_ is mode 755
and execute ldconfig.

Did you have a full root filesystem upon reboot? In this case,
/etc/ld.so.cache might not have been created correctly by ldconfig.

If these hints don't lead to a result, please send me an strace of
        cat /dev/null
        mkdir
        who
        finger
        ls -la /dev/null
personally, not to the list.

It seems that the only common library used by those executables is
/lib/libc.so.6 (since this one is the only one used by cat). Send an
md5sum and ls -la of it, too, as with /lib/ld-linux.so.2.

Regards,
Roman. 

-- 
 _                                                                   _
| Roman Drahtmüller               "Freedom means that you can choose  |
  CC University of Freiburg        what you want to learn at a given  
| email: drahtuni-freiburg.de     time."            A. Becker, 1999  |
 -                                                                   -
People often find it easier to be a result of the past than a cause of
the future.

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