Another rkhunter question
Bill Davidsen
davidsen at tmr.com
Mon May 18 20:34:21 UTC 2009
Paulo Cavalcanti wrote:
>
>
> On Sun, May 17, 2009 at 10:35 AM, Gene Heskett <gene.heskett at verizon.net
> <mailto:gene.heskett at verizon.net>> wrote:
>
> Greetings all;
>
> What is /dev/shm?
>
> I've given up on rkhunter ever shutting up about the group and
> passwd files,
> but fussing about this is new.
> ---------------------- Start Rootkit Hunter Scan ----------------------
> Warning: Suspicious file types found in /dev:
> /dev/shm/sem.ADBE_REL_root: data
> /dev/shm/sem.ADBE_WritePrefs_root: data
> /dev/shm/sem.ADBE_ReadPrefs_root: data
>
> And indeed, these files that I nuked friday are back:
> [root at coyote linux-2.6.30-rc6]# ls -l /dev/shm
> total 24
> -r-------- 1 root root 67108904 2009-05-16 02:37 pulse-shm-3724332759
> -rw-rw-rw- 1 root root 16 2009-05-16 20:33 sem.ADBE_ReadPrefs_root
> -rw-rw-rw- 1 root root 16 2009-05-16 20:33 sem.ADBE_REL_root
> -rw-rw-rw- 1 root root 16 2009-05-16 20:33
> sem.ADBE_WritePrefs_root
>
Do you have some Adobe stuff installed? And might you ever accidentally have
used it as root? Just looking at the name, I know you're old enough to know
better. ;-)
> Anything with 'pulse' in its name has been nuked by an 'rpm -e', and I
>
>
> You should have not, but it is your choice.
>
Is there a better way to get rid of PulseAudio? Some install option which
prevents infecting the system in the first place?
>
>
> actually have working audio now, so can someone please explain this?
> A 67
> megabyte file in /dev for an shm device is for what purpose?
>
> I looked at it with mc's hex viewer, and the first 10 or so
> megabytes are all
> $00. I got tired of standing on the page down key.
>
>
> Just add these rules to /etc/rkhunter.conf, in the appropriate place:
>
> # Allow the specified files to be present in the /dev directory,
> # and not regarded as suspicious. One file per line (use multiple
> # ALLOWDEVFILE lines).
> #
> #ALLOWDEVFILE=/dev/abc
> #ALLOWDEVFILE=/dev/shm/pulse-shm-*
> # Adobe Reader (acroread) 9.x
> ALLOWDEVFILE=/dev/shm/sem.ADBE_ReadPrefs_[a-zA-Z]*
> ALLOWDEVFILE=/dev/shm/sem.ADBE_REL_[a-zA-Z]*
> ALLOWDEVFILE=/dev/shm/sem.ADBE_WritePrefs_[a-zA-Z]*
>
>
> --
> Paulo Roma Cavalcanti
> LCG - UFRJ
>
--
Bill Davidsen <davidsen at tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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