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Re: Group permissions changed

Subject: Re: Group permissions changed
Date: Thu, 29 Sep 2005 21:43:03 +0200
On Wednesday 28 September 2005 20:33, sf_submit@yahoo.com wrote:
I posted this before on the security basics, but haven't recieved a
response, and it worries me a bit, so I'm sending this to a few other
groups in hopes that someone will have an idea about it.

---

Fairly recently I noticed my ftp client wouldn't list files in certain
directories on my server anymore - so I ssh'd in (it's dedicated), and did
a ls -aFl on the files, hoping to see what the problem was - here are a few
of the results:

-rw-r--r-- 1 larry 503 371 2005-02-25 08:36 head.php
-rw-r--r-- 1 larry 48 873 2005-09-09 03:23 foot.php

I never set the group ids to 503 or 48, so I checked just to make sure -
and no groups with those ids even exist. Is there an exploit/tool that
causes this, and should I be worried?

I seem to remember that tar preserves group numbers when unpacking an archive, 
but I cannot check it right now.

-- 
Joop Gerritse
Mühlenstraße 11
D-47546 Kalkar-Wissel
Germany
+49 2824 971487
http://www.jjge.nl

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