Found at : http://www.jethrocarr.com/index.php?cms=blog:20090718
A new 0-day attack on the Linux kernel has just been released by Brad Spengler called the “Chedder Bay Exploit” which exploits a flaw in the Linux 2.6.30+ kernel.
This exploit is interesting, in that the code doesn’t look particularly broken, but when compiled the compiler optimisations causes the compiled code to have a security hole.
For more technical details on this exploit and further news, check the LWN.net article or use the CVE reference CVE-2009-1897.
From my quick review of the exploit, it appears the attack uses Pulseaudio to bypass Selinux security if it is enabled and then performs an attack against the /dev/net/tun device, allowing a standard user to gain root access.
Not having pulseaudio or the tun kernel module loaded should prevent this exploit from working, although I have not yet had sufficient time to test this since I received the alert announcement around 3am NZ time.
The exploit affects the 2.6.30+ kernel releases and also some of the test kernel 2.6.18 kernel releases by Redhat.
However, all production kernel releases for RHEL/CentOS do not appear to be vulnerable since the change that introduced the security exploit had not been backported yet.
In my tests on CentOS 5.3 with kernel 2.6.18-128.1.16.el5xen on i386/xen, I was unable to trigger the exploit.
Found at http://www.prestonmoore.com/archives/51-Asterisk-Freebx-on-Centos-5.3.html
Install Centos 5.3
yum update && reboot
wget http://nzlinux.com/wp-content/uploads/files/centos53pbx.sh
nano centos53pbx.sh # change "passw0rd" and IP address
sh centos53pbx.sh
Finished
Note: This tutorial is related to Ubuntu, however the clueful can use it easily enough
My kids old apple bit the dust the other day, so i thought ‘stuff buying another overpriced machine, their linux box can suffice’
They use gnome, and are familiar with rhythmbox – which i might add, works brilliantly with iPods.
So after a few days the kids started moaning that half the music had disappered. I double checked, and it turns out half it bought of iTunes was in m4a format which wasnt readable.
Solutions!
If you are not tied to rhythmbox then jump in and install xmms and xmms-faad packages.
If you are then this is the solution.
Install the Medibuntu sources
sudo wget http://www.medibuntu.org/sources.list.d/`lsb_release -cs`.list --output-document=/etc/apt/sources.list.d/medibuntu.list; sudo apt-get -q update; sudo apt-get --yes -q --allow-unauthenticated install medibuntu-keyring; sudo apt-get -q update
Then install the following packages
sudo apt-get install libavcodec-unstripped-52 libavdevice-unstripped-52 libavformat-unstripped-52 libavutil-unstripped-49 libpostproc-unstripped-51 libswscale-unstripped-0 ffmpeg
Now convert!
ffmpeg -i file.m4a -acodec libmp3lame file.mp3
Now you need to add the id3 tags,
id3tool -t "title of song" -a "album name" -r "Artist" file.mp3
Bingo!