Ubuntu Security :: John The Ripper Installed Without Knowledege?
Nov 2, 2010
I am relatively new to Ubuntu and may have a security breech. I was recently looking over synaptics installed packages on my PC and noticed JOHN installed on my system. This was never installed by me nor do I think this entire APP is a dependency of something that may have been installed.My questions are... Has my system been compromised? I use an elaborate password as well as UFW.Can I determine who installed this package (i.e. local user account or remote user)?Can I determine when? The system was installed only 3 days ago.Can I determine if there have been any instances of a successful or failed remote connection to my PC?
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Apr 4, 2010
I'm using ubuntu 9.10 and I'm trying to crack my own password with John the Ripper. I've been reading and working at this for a long time and I've not been able to crack my password. I've added a "test" account on my machine with the password "password": For my Unix Password:
Code:
mark@mark-laptop:~/John/john-1.7.3.4/run$ sudo ./unshadow /etc/passwd /etc/shadow > mypasswd
mark@mark-laptop:~/John/john-1.7.3.4/run$ sudo ./john mypasswd
No password hashes loaded
YES I have read the README and the FAQ and for this problem they give the following possible problems:
Q: Why doesn't John load my password file? It says "No password hashes
[Code]...
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Feb 19, 2010
In my Open-Suse server I have a script, where makepasswd output(by default it generates similar passwords: cGyTbqpr, tpJ1LA, 33EXdo) is redirected to mkpasswd(which uses DES by default) in order to generate salted hash of this previously generated password. I would like to test the strength of this system. I have a quad core CPU, and if I start John The Ripper like this(I want to use -incremental:all flag):
john -incremental:all passwd
..only one core is utilized at 100%. Is there a possibility to make all four cores to crack this password? Or is this possible only after reprogramming John The Ripper? Or what is the algorithm for generating passwords with with -incremental:all flag? I mean if John generates passwords randomly in brute-force mode, then it's smart to start four different John processes simultaneously because then one of those four will find the password firs
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Jan 22, 2010
i'm trying to find a GUI for john the ripper. ive searched and found some for windows but none for linux
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Aug 26, 2011
I ran a simple command "mail" on my Suse Linux 11.1 box and it's display "/var/mail/john: Permission denied" I had two users, john and peter When I login as peter and ran "mail" it display the same error when I login as john
"/var/mail/john: Permission denied"
I'm using postfix as my MTA. Here's the output from the command ls -l /var/mail
lrwxrwxrwx 1 root root 10 2011-08-06 11:54 /var/mail -> spool/mail
Here's the out output when I run echo $MAIL
/var/mail/john
I login with different user and run echo $MAIL it output the same line /var/mail/john
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Aug 25, 2010
Is there a way to to check if the system has the available security updates installed? Specifically, I am looking to do this programmatically.
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May 11, 2010
I'm on 10.04. Every dvd ripper I've tried so far has failed in one or another. I have all restricted extras and medibuntu codecs installed.
DVD::Rip either throws an error message or stops ripping somewhere through the process
Handbrake only finds some of the dvd titles
OGM rip gives an "Unknown error"
Acidrip says "mencoder interrupted by user"
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Apr 30, 2010
Started with a clean install, with new GeForce 6200 video card installed. Very impressed that when I tried to activate compiz, it informed me that I must download and install the relevant drivers - and it provided me with a 'one click' install! Now I'm running the latest driver (195) - well done guys!Anyway, happy as I am with a no-fuss install, I'd like to know what is everyones pick of CD ripper to MP3?
I've downloaded Asunder, but this seems very slow in comparison to other Windows-based apps I've tried.I wanted to try Sound Juicer, but unfortunately it requires some code to change from VBR to CBR @ 320kbps.
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Nov 10, 2010
All I'd like to reliably do is rip a few audio CDs. SoundKonverter - doesn't work at all. Log tells me nothing SoundJuicer - OK for one disk. Usually crashes when the read disk is ejected and attempts are made to read the next. Failing that, it will read a few tracks and then lock up. K3B - Only rips first disk, then the progress window (form) locks up at 100%. Cancel button doesn't work. Need to kill task.
RipOff - works OK, but so slow... life's too short goobox - locks up before it even reads the disk and despite its claims I don't think it's a "rip" tool anyway.
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Dec 6, 2010
I recently downloaded Utube ripper, and now it is in my applications panel. But oddly, It does not boot. I try to delete it to reinstall it, but I can't find it anywhere. What folder could I find it in
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Feb 4, 2010
Is it possible to install a bluray ripper via the terminal that can be used via the terminal?
I'm using xbmc and from what I've read it's not possible in the frontend.
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Mar 18, 2011
I'm trying to install Rubyripper into Maverick using these guidelines: [URL]
But I get this error message in terminal:
Code:
W: Failed to fetch http://ppa.launchpad.net/aheck/ppa/ubuntu/dists/maverick/main/source/Sources.gz 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/aheck/ppa/ubuntu/dists/maverick/main/binary-i386/Packages.gz 404 Not Found
E: Some index files failed to download, they have been ignored, or old ones used instead. Presumably because it can't find the package. But what do I do next? or is there an alternative way to install?
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May 15, 2011
I am looking for a decent easy to use DVD ripper (Like K9copy) but want it to be xfce native application has anyone got any ideas on this?
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Dec 2, 2008
The subject of this post is actually a question e.g. is there a mp3 ripper that allows the bitrate to be modified. I have looked at cdparanioa, which I believe is the foundation of most of the Linux rippers, but it does not allow modification of the bitrate. I realise I could ripper in flacc format but I have an mp3 player as does my grandaughter so I need the mp3 format. Incidentally is there a player(portable) that will play flacc encoded files?
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Jan 14, 2010
I'm looking for the best way to pull some video files off of DVDs onto the desktop. These are not copyright protected. I don't want a program that plays the movie and then make a duplicate like most windows programs these are TOO slow. Also if I could shrink and change the format that would be a huge bonus.
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Dec 15, 2010
I'm vaguely remembering a video stream ripper that was open source and could be compiled for linux, mac, and windows. It's name ended with ++ and I can't remember anything else Basically, it was like StreamTransport but open source and multiprotocol capable. Can anybody help me find it again? I'd be open to alternatives too of course! My basic need is to rip anything being rendered by my video card.
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Nov 1, 2010
Tried kungfu ripper, is supposed to rip dvd's to theora. Great. Program hangs and stops. This is from Packman repo, not factory.
[Code]...
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Oct 11, 2010
I've just setup a new Ubuntu Server 10.10 serving SVN through Apache (HTTP, HTTPS).It seems all ports are open by default on this new server. Why is this? Do I need to lock it down with iptables, or is it secure as it is anyway (somehow)?
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Feb 5, 2011
I installed fail2ban from the Ubuntu Software Center (Ubuntu 10.10) and everything seemed to go fine. But when I try to access the client I get this output:
Code:
wolfgang@Culture:/var/log$ fail2ban-client status
ERROR Unable to contact server. Is it running?
[code]....
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Jan 26, 2010
I've installed Clamav antivirus from synaptics but I can't find it on any menu now. How can I run it?
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Apr 10, 2010
I recently installed Ubuntu Linux and did not encrypt the home directory during the install. Now I want to encrypt my home directory, or even better the whole hard drive.
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May 5, 2010
I have a major major issue with an encrypted /home directory. I had used encryption on my home directory when I installed 9.10. However, I had not noticed that I needed to store the automatically generated passphrase anywhere. Now, upon installing 10.04, my home directory would not decrypt. I checked my .encryptfs directory and the wrapped-passphrase file is GONE. I only have the Private.sig files from my 9.10 installation and of course know the login password I binded to the passphrase. I can see my .Private directory with filenames starting with ECRYPTFS_FNEC_ENCRYPTED. Now, my PhD thesis which I have to deliver in 2 weeks is in there. With no backups. How to recover my data. If no 'normal' method would work, is it possible to use a brute force attack and feed it my login password?
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Aug 5, 2011
In Ubuntu 10.04 LTS, I have downloaded and installed texlive (2011). They have issued the following warnings:
1. "To the best of our knowledge, the core TEX programs themselves are (and always have been) extremely robust. However, the contributed programs in TEX Live may not reach the same level, despite everyone�s best efforts. As always, you should be careful when running programs on untrusted input; for maximum safety, use a new subdirectory."
What does this exactly mean? The installed program has already created own directories and subdirectories (e.g. /usr/local/texlive/2011/bin/i386-linux). Am I supposed to create a new subdirectory in home to write files and run latex program? Exactly how do I know that the downloaded and installed program is not malicious?
2. "Finally, TEX (and its companion programs) are able to write files when processing documents, a feature that can also be abused in a wide variety of ways. Again, processing unknown documents in a new subdirectory is the safest bet."
what is implied by "a feature that can also be abused in a wide variety of ways".
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Jan 25, 2011
I want to install Ubuntu 10.04 in my USB flash drive and boot from it because in my working place, only centos is installed in workstations.In advance, I thought of encrypting the installation of Ubuntu in the USB flash drive and In would be very thankfull if some can give me some help regarding this.Basically what I need is, encrypted Ubuntu installation in my usb fashdrive and can boot from it.
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Jan 2, 2010
When you have a computer whose hard drive is partitioned with one part Windows and the other Linux, what are the concerns with viruses and transference across the two systems? Can viruses infect the windows side brought over through the Linux side (Firefox) or are the partitions completely separated? In other words, if all of your Internet voyages are through Firefox under Linux, is there any danger of infecting the Windows side of the computer? What about when having Linux installed within the Windows portion as a virtual system?
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Apr 13, 2010
I need to know whether Ubuntu can be hacked when it is installed as a dual boot with W7 by hacking windows and getting access to the Ubuntu partition?
What I would also like to know if this way can be used to put a key logger or screen capture in Ubuntu which installs next time Ubuntu is started?
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Apr 20, 2010
I just installed it by following steps in [URL]
but when I run "msfconsole", I got the following error messages telling me that ruby-openssl is not installed. I installed it "apt-get install libopenssl-ruby" but same message still comes again. I'm running Ubuntu 9.10.
root@qa-ud910-32-1:/opt/metasploit3/msf3/external/ruby-lorcon2# msfconsole
*** The ruby-openssl library is not installed, many features will be disabled!
*** Examples: Meterpreter, SSL Sockets, SMB/NTLM Authentication, and more
[-] ***
[Code]....
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Jul 1, 2010
Is there a firewall installed and running in 10.04? If so are there any gui tools for configuring it and where are they? If there is not a firewall, what should I install to get one properly up and running?
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Apr 22, 2011
A few weeks ago I did a WUBI 10.04 LTS install on a Windows XP desktop that went perfect. System ran great until this morning. I was prompted to install "Security Updates", which I allowed the system to do, but thereafter was unable to boot. What happens is at the point of selecting either Windows or Ubuntu for booting, and I choose Ubuntu, the computer goes right back into a re-boot process and brings me back to the Windows/Ubuntu boot selection prompt. It doesn't even bring me into the secondary boot level of asking which type of Ubuntu boot I want (generic, etc.). Is there a solution for this problem besides reinstalling Ubuntu?
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Jan 6, 2011
I have installed Ionix vCM onto a Red Hat Linux box. It correctly communicates with the collection server if I use the Ionix certificate. However, if I use a self-generate certificate, communication fails.
(1) How do I determine which PKI certificates are resident on the Red Hat box?
(2) How do I manually install a PKI certificate?
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