[Bug 584614] [NEW] File "dhclient.conf" cannot be read.

Sun May 23 16:34:40 UTC 2010

Public bug reported:

Release info:
:/etc# lsb_release -rd
Description:	Ubuntu 10.04 LTS
Release:	10.04

Package info:
:/etc# dhclient -v
Internet Systems Consortium DHCP Client V3.1.3
Copyright 2004-2009 Internet Systems Consortium.

What I expected to happen:
Logged in as root, use "less" or "cat" to review the contents of the "/etc/dhclient.conf" file.

What actually happened:
Logged in as root, I could not directly see the /etc/dhclient.conf file in an "ls" listing and I could not view the contents of the file.

The file "/etc/dhclient.conf" will appear in a listing "ls -al /etc/dh*"
as follows (all commands run as root):

:/etc# ls -al dh*
total 28
drwxr-xr-x   4 root root  4096 2010-04-30 15:47 .
drwxr-xr-x 156 root root 12288 2010-05-23 12:05 ..
-rw-r--r--   1 root root  1716 2009-10-08 18:51 dhclient.conf
drwxr-xr-x   2 root root  4096 2010-04-30 15:48 dhclient-enter-hooks.d
drwxr-xr-x   2 root root  4096 2010-04-30 15:48 dhclient-exit-hooks.d

However, this file will NOT appear in a listing "ls -al
/etc/dhclient.conf":

:/etc# ls -al /etc/dhclient.conf
ls: cannot access /etc/dhclient.conf: No such file or directory

Any attempt to cat or less the file /etc/dhclient.conf results in
failure:

:/etc# cat /etc/dhclient.conf
cat: /etc/dhclient.conf: No such file or directory
:/etc# less /etc/dhclient.conf
/etc/dhclient.conf: No such file or directory

This behaviour was noticed on a Lucid Lynx system, and a rootkit was
suspected. However, this was repeated on a Lucid Lynx "live cd session"
so it is clearly not a result of an intrusion.

Looking for "dhclient" in lsof output produced the following which
includes no listing for the dhclient.conf file:

:/etc# lsof | grep "dhclient"
lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/john/.gvfs
      Output information may be incomplete.
dhclient  1130       root  cwd       DIR        8,2     4096          2 /
dhclient  1130       root  rtd       DIR        8,2     4096          2 /
dhclient  1130       root  txt       REG        8,2   415516       4285 /sbin/dhclient3
dhclient  1130       root  mem       REG        8,2    42572    3014915 /lib/tls/i686/cmov/libnss_files-2.11.1.so
dhclient  1130       root  mem       REG        8,2  1405508    3014894 /lib/tls/i686/cmov/libc-2.11.1.so
dhclient  1130       root  mem       REG        8,2   113964       2224 /lib/ld-2.11.1.so
dhclient  1130       root    0u      CHR        1,3      0t0       1081 /dev/null
dhclient  1130       root    1u      CHR        1,3      0t0       1081 /dev/null
dhclient  1130       root    2u      CHR        1,3      0t0       1081 /dev/null
dhclient  1130       root    3u     unix 0xf09c8600      0t0       5514 socket
dhclient  1130       root    4r      REG        8,2      852        596 /var/lib/dhcp3/dhclient-03d7fb69-4cb9-4bc5-925e-da357142a9ae-eth0.lease
dhclient  1130       root    5w     IPv4       5536      0t0        UDP *:bootpc 
dhclient  1130       root    6u     pack       5530      0t0        ALL type=SOCK_PACKET

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-22-generic-pae 2.6.32-22.33
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic-pae 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic-pae i686
NonfreeKernelModules: vmnet vsock vmci vmmon nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  john       2083 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xf7ff4000 irq 16'
   Mixer name	: 'Realtek ALC887'
   Components	: 'HDA:10ec0887,10ec0887,00100202'
   Controls      : 35
   Simple ctrls  : 20
Date: Sun May 23 12:15:19 2010
HibernationDevice: RESUME=UUID=7c97cabc-b3c2-4571-b56e-d976f29f23ef
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: System manufacturer System Product Name
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic-pae root=UUID=f554316f-139e-43dd-a4a0-08ba4dae118c ro acpi_enforce_resources=lax quiet splash
ProcEnviron:
 LANG=en_CA.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
RfKill:

SourcePackage: linux
dmi.bios.date: 09/14/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1214
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A78 PLUS
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1214:bd09/14/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A78PLUS:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: apport-bug i386 lucid needs-upstream-testing networking

-- 
File "dhclient.conf" cannot be read.
https://bugs.launchpad.net/bugs/584614
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