Gentoo Archives: gentoo-amd64

From: Duncan <1i5t5.duncan@×××.net>
To: gentoo-amd64@l.g.o
Subject: [gentoo-amd64] Re: rkhunter results
Date: Sun, 10 Oct 2010 12:04:05
Message-Id: pan.2010.10.10.11.10.59@cox.net
In Reply to: Re: [gentoo-amd64] rkhunter results by Thanasis
1 Thanasis posted on Sat, 09 Oct 2010 12:28:26 +0300 as excerpted:
2
3 > on 09/28/2010 12:34 PM Paul Stear wrote the following:
4 >> Hi all,
5 >> rkhunter runs every day and reports the following:-
6 >>
7 >> System checks summary
8 >> =====================
9 >>
10 >> File properties checks...
11 >> Files checked: 142
12 >> Suspect files: 141
13 >>
14 >> Rootkit checks...
15 >> Rootkits checked : 246
16 >> Possible rootkits: 2
17 >> Rootkit names : Xzibit Rootkit, Dica-Kit Rootkit
18 >>
19 >> Any idea how I find and remove these Rootkits?
20 >>
21 >> thanks for any help
22 >> Paul
23 > Did you check the log file (/var/log/rkhunter.log)?
24
25 If rkhunter is based on recorded file checksums, it's obviously going to
26 have false-positives every time you update the files it checks, which
27 tends to be reasonably frequently for many gentoo users (especially ~arch
28 users), since given gentoo's rolling update nature.
29
30 That's very possibly why it's saying 141 out of 142 files are suspect. A
31 possible workaround would be running it before every update, to be sure,
32 then running it after the update to update its checksums.
33
34 But that doesn't explain the possible rootkits detected. Of course,
35 depending on how it detects specific rootkits, that too may have false
36 positives. If it happens to the big AV folks like Norton and McAfee, and
37 it does, it's going to happen to everyone, occasionally.
38
39 --
40 Duncan - List replies preferred. No HTML msgs.
41 "Every nonfree program has a lord, a master --
42 and if you use the program, he is your master." Richard Stallman