Re: Group permissions changed
From: Eduardo Tongson (propolice_at_gmail.com)
Date: Thu, 29 Sep 2005 16:45:22 +0000 To: firstname.lastname@example.org
On 28 Sep 2005 18:33:24 -0000, email@example.com <firstname.lastname@example.org> 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?
503 and 48 has [r] rights only no need to worry.
Whoever uploaded the files probably had the owner/group preserved.
> I checked the processes running, and everything seems to be OK - same with any processes connecting to the internet.
Ask or check how these files are uploaded.