Welcome to Linux Forums! With a comprehensive Linux Forum, information on various types of Linux software and many Linux Reviews articles, we have all the knowledge you need a click away, or accessible via our knowledgeable members.
Find the answer to your Linux question:
New to Linux Forums? Register here for free!
    Linux Forums > GNU Linux Zone > Linux Security > AIDE found differences between database and files in dev directory!!

Forgot Password?
 Linux Security   Discussion about keeping your machines secure, and the crackers out.

Site Navigation
Linux Articles
Linux Forums
Linux Downloads
Linux Hosting
Free Magazines
Job Board
IRC Chat
RSS Feeds


Linux Forum Topics
Linux Forums
Your Distro
Linux Resources
GNU Linux Zone
The Community
Reply
 
Thread Tools Display Modes
Old 06-29-2005   #1 (permalink)
Just Joined!
 
Join Date: Jan 2005
Location: Germany
Posts: 69
AIDE found differences between database and files in dev directory!!

Hi,
AIDE found differences between database and files in dev directory!!
I am almost sure that it wasn't a hack. How could the ctime of some files in dev be changed? What program could do that?

As far as I know: The ctime--change time--is the time when changes were made to the file or directory's inode (owner, permissions, etc.).

All files that were changed represent devices that I am not using (sound, scanner, mic, usb). This is a server without graphical interface installed, locked in a room (no one had physical access yesterday at 15:55:36) and no one has tried to access/install there devices.

Ex: File: /dev/usb/scanner14
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

The ctime of all files was changed at the same time (2005-06-28 15:55:36 ). I also don�t know why the old ctime was 2005-06-21 15:16:24. Nothing special happened on 2005-06-21 15:16:24 but AIDE wasn�t installed on 2005-06-21 15:16:24 so I couldn�t notice that.



What do you think? Should I worry?


Here are some lines from AIDE report:

File: /dev/audio1
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/audioctl
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/dsp
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fd0CompaQ
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/dsp1
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/dsp56k
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb0
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb1
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb10
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36
File: /dev/fb2
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb20
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb21
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb22
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb23
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb24
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb25
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb26
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb27
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb28
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb29
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/fb3
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/midi0
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/midi00
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/midi01
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/midi02
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/midi03
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/midi1
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/midi2
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/midi3
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/mixer
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/mixer1
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/ptmx
Mtime : 2005-06-27 17:13:59 , 2005-06-28 17:33:37

File: /dev/radio0
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/radio1
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/radio2
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/radio3
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/sequencer
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/dc2xx0
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/dc2xx1
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/dc2xx10
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/scanner14
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/scanner15
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/scanner2
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/scanner3
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/scanner4
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/scanner5
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/scanner6
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36

File: /dev/usb/scanner7
Ctime : 2005-06-21 15:16:24 , 2005-06-28 15:55:36
ddaas is offline  


Reply With Quote
Old 07-05-2005   #2 (permalink)
Linux Guru
 
Join Date: Oct 2001
Location: Täby, Sweden
Posts: 7,578
Well, that's what udev does. Its entire purpose is to update /dev nodes whenever the kernel gets a hotplug event.
Dolda2000 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Free Magazines
Run Your Own Web Server Using Linux & Apache - Free 191 Page Preview
Learn about everything you'll need to build and maintain your Linux servers, and to deploy Web applications to them.
subscribe
Open Source Security Myths Dispelled
Dispel the five major myths surrounding Open Source Security and gain the tools necessary to make a truly informed decision for your IT organization
subscribe
InformationWeek
InformationWeek is the only newsweekly you'll need to stay on top of the latest developments in information technology.
subscribe



All times are GMT. The time now is 06:32 AM.






© 2000 - 2009 - All Rights Reserved - Property of  MAS Media

Content Relevant URLs by vBSEO 3.3.0 RC2