Ubuntu Security :: Changed Password But Didn't Update Passphrase
Apr 19, 2011
When I set up an ID in Ubuntu, I encrypted it. I did a print screen of the passphrase and put it on the desktop. I'm just learning how to use the encryption so don't fault me for putting it right on the desktop. There is no important data in this ID. Now, I went and changed my password to the account. On the next boot, I got a few error message:
Could not update ICEauthority file /home/mickymouse/.ICEauthority
There is a problem with the configuration server /usr/lib/libconf2-4/gconf-sanity-check-2 exited with status 256 In researching these, it looks like the problem is that I changed the password but didn't update (or something) my passphrase.
I can't boot into the GUI but I have figured out how to boot to a command prompt. I don't have access to my home directory because I don't have my passphrase. Am I toast or is there a way to recover / update the passphrase?
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Feb 9, 2010
Simply, the number of possible combinations of passwords increases as an exponent of the number of characters used and as a factor of the number of characters available for use.
26 potential characters for a 2 character password results in 26^2 possible password combinations. This means that each new character added would result in an "order of magnitude" increase in the difficulty of brute force attack.
Using a phrase, complete with punctuation and capitalization is the very best mnemonic device to remember a password. Consider this, how hard is it to remember; The quick brown fox jumped over the lazy dog.
Than it is to remember, l33tsp34kp@ssw0rd
If we pretend that both of these passphrases are generated from a character set consisting of 26 characters, the first would be one of a possible 15274273784216769021564085930704478424313742483024 510976. The second would be one of a possible 1133827315385150725554176.
In short, use a passphrase not a password, they are much MUCH more secure.
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Apr 10, 2010
I'm running 64-bit Ubuntu Karmic, Encrypted HDD.I changed my login passwordwhen i try to boot i click on my name and type in my new password i have 'authentication fail' when i type in my old password this happens"could not update ICEauthority file /home/chris/ICEauthority""Their is a problem with the configuration server. (/usr/lib/libconf2-4/gconf-sanity-check-2) exited with status 256""Nautilus could not create the following required folders/Home/chris/Desktop,/home/chris/.nautilusBefore running nautilus, please create these folders, or set permissions such that nautilus can create them."
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Jan 20, 2011
Protect against root password change[Log in to get rid of this advertisement]I have recently had to force a change of the root password on a linux box I was running. It was a test system which I had not used in a while, so I forgot the root password (not so smart).Anyway, I found that it was amazingly easy to reset the root password. Here is a straight forward article on how to do it.URL...
My question is: how can you protect against this? I see this as a security hole.I understand that the user must have physical access to the computer, but if I want to lock the system down so you cannot easily enter single user mode or the root password cannot be changed.
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Aug 25, 2010
I just changed my password now every time I start my computer the keyring wants my old password and it keeps doing weird things even after I type it in. Like Ubuntu will say No keyring found or something to that effect anyway.
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Feb 8, 2011
I considered making my system run the following if an incorrect password is entered 10 times in a row or a specific dead-password is entered.Code:shred /home/.ecryptfs/$USER/.ecryptfs/wrapped-passphrase.Because ext4 doesn't journal the contents of the file, only the metadata, the file would be shredded and it would be impossible to recover the encrypted home folder even with the password.Is there a simple way I could make GDM check this or would I have to patch and recompile GDM for something like this to work?
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Jul 19, 2011
We have small requirement, we need to connect to ssh server through ey+Passphrase+password. Is it possible to configure this type of authentication in any version of openssh/fedora.
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Sep 2, 2010
I'm trying to add a key to a new slot from a keyfile that I created, but I keep getting an error and I don't know what the problem is.
Code:
root@ubuntu:~# cryptsetup luksAddKey --key-slot 1 /dev/sda5 -d /media/Ubuntu_10_04/etc/cryptkeys/swap.key
No key available with this passphrase.
content of swap.key
Code:
nBPeNCr_PS-yEv5SYEyyzaEextllDLo7aHs7yZGW9dtC48GDlte6WYQe7iG2poJr84U6twxu1DImZcyoBPB1q1AjYAanPsre7qLr7VnN4G6u1x_WG-sja6U_pvnks9CTgcD4UmfBw9mkrU3YY4GknQXtpLvkiBkM1soJ0SYYQ2r-7CDZJvaiYJb9eOKKbMsjlrEG39IBdQwdcEp3D7PK5paTYZdVHU2ygrJvJy-sJly4oqb2274DO8hbYviQsPdawetglkhhhhhhh98h4erwjerfkasjnfhsahfocLnBPeNCr_PS-
[code]....
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Sep 5, 2010
i have installed a ubuntu 10.04 (mini iso) w/ option of root encryption. Now i need to boot without ask for passphrase, but im trying to add a luks keyfile without success.i want to use a keyfile in the /boot partition or inside the initrd (cant be in external pendrive), but ubuntu aparently dont accept a keyfile in /boot or initrd file. I know, this way isnt very security, but i just need a basic encryption.So, how to force the use of a keyfile in /boot or inside the initrd for a crypt root partition?
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Aug 4, 2010
I need an non-interactive, symetric, passphrase mechanism that can be used on machines beyond my sys-admin control. Currently, I use the Python code (with variants):
Stat, Output = commands.getstatusoutput(
"gpg -c --passphrase=%s '%s'"%(Password, TarFileName))
to encrypt and decrypt files (tar balls). The "Password" is generated by a Python code on a singular removable flash drive. It worked with FC11 and Windows, but with FC13 I get an interactive dialog, which gets canceled, and then: can't connect to `/home/{a user id}/.gnupg/S.gpg-agent': No such file or directory
gpg-agent[3432]: command get_passphrase failed: Operation cancelled
gpg: cancelled by user
gpg: error creating passphrase: Operation cancelled
gpg: symmetric encryption of `testdata' failed: Operation cancelled
The operator does not know the pass phrase. This is a single user mechanism which relies upon the mounting of the special flash drive to work. The application is portable across many platforms and hosts, but can only be used by the possessor of the flash drive.
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Apr 21, 2011
How can I enable passphrase along with the password for login via ssh ? In that whenever I login from server A to server B via ssh, it should ask me for a password and then passphrase to allow me access.
OR
Can we have multiple passwords to login via ssh ?My basic need is to have 2 levels of password.
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Jul 28, 2009
I have currently a file server that runs on Fedora 9, and all other PCs (mostly running Windows XP) access the file server via SAMBA. Everything works perfectly! However, lately a home invasion in my neighborhood got me thinking. If they take my file server, my data is not protected. So, I would like to implement the LUKS partition encryption (/home) which sits on a separate disk. However, I don't quite like the decryption process at boot time. In other words, I would like to wake up the file server (WOL) remotely, and when it's done booting, I would like to log-in using the other PCs and enter the passphrase remotely to decrypt /home. Is this possible using LUKS encryption (i.e., cryptsetup)? If not, what would be another alternative to what I am trying to do using a secure encryption (so that the data is safe from thieves)?
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Feb 8, 2011
I have an encrypted disk, using LUKS / dm-crypt, on Fedora 14.Every time I boot, I am immediately prompted for the passphrase. This happens VERY early in the boot process, and is a graphical screen (ie not console text). If I hit escape, I am prompted in a text-mode for the same passphrase. If I hit escape or return a few times, boot continues normally.
I only mount the disk occasionally, and don't want to be prompted at boot for the passphrase to luksOpen the disk at boot. I manually cryptsetup luksOpen and then mount it when I want access. I just don't want to be asked at boot, and don't want to unlock it until I do so manually.Does anyone how how I can tell Fedora to not attempt to decrypt / mount this filesystem at boot?It's not in /etc/fstab. I should mention, no LVM, just mdadm raid5 on the partition + luks /dm-crypt.
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Apr 4, 2011
How to change the passphrase for crypted partitions in F14?
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Sep 20, 2010
Hello everI'm really confused by the ways an encrypted partition get mounted.It just mounts the partition without asking for the passphrase used to create it. I can list the files in /mnt/sda2, create a new file test.txt, but have no access to the files written to the "real encrypted partition".Then I can see/change the content of the encrypted partition but without being able to see/change the file test.txt created previously with the normal mount command.
The reason I'm asking is that I'm having my custom Debian to automount every partition available on the system at boot time. Is there any way/command to tell if a particular partition is encrypted (by cryptsetup) or not? So that I can mount it the right way and not make the users confused (or even harm the encrypted data).
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Jun 8, 2010
I was wondering whether increasing the strength of a key by increasing the number of bits in the key to 2048 makes any sense if I want to leave the passphrase blank anyway? I'm setting up passwordless ssh logins on my LAN as I'm a bit tired of constantly being asked for a password.
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Nov 21, 2010
I just installed the testing version of Debian with the option to setup encrypted home directories. I used a passphrase that I now want to change to something else. How do I do that?
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Jul 6, 2010
I always use VNC to check my server for updates, and this morning I started the xvnc4viewer to vnc into my server and it keep asking for a password. I never setup a password because I do this local from my laptop, and I am the only one who uses my laptop. I had to go to my server and check the setting in System > Preferences > Remote Desktop and found them all changed. There was a password setup and there was a check mark in the you must confirm each access to this machine there some security update that changed all these setting? Sometimes when I do updates I don't know what is being changed on my server
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Feb 21, 2011
I have downloaded the backtrack 4 r2 but when I started it, it didn't show me the line to enter the user name and the password
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Sep 7, 2010
So I was testing to see what would happen if I tried to open a root shell in recovery mode, WITHOUT having first activated the root-user account (I only installed the system two days ago). I used my ordinary password and was expecting to see something like "Invalid password" or some such message. To my surprise, I got a root prompt. Thinking that this may just be how it works with recovery mode, I tried logging out of my X session and logging back in as root, thinking (or at least hoping) that it wouldn't work. But it did.
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Jan 27, 2011
i have openssh on my box with kubuntu 10.10, i didn't install it and would like to know it's purpose being on here
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Dec 3, 2010
Does any know if there is a way to recover or reset my password. Its the only account on the desktop.
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May 4, 2011
Using thunderbird for email, as several users of this computer have individual preferences. Worked in 10.10 and previous. Upgraded to 11.04 this morning, had to install from CD due to my mistake. Changed computer name too. No worries, have done this before. Added new account to Thunderbird. Copied over mail folders too. Application is good to go. However, when checking email now get reply from server that password is invalid. Checked all account settings within T-Bird but cannot locate password setttings for this server/account. Appears to use something called STARTTLS. How to access this store of passwords?
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Mar 16, 2011
When I firsts installed Ubuntu 10.04, and tried to hook it up to my wireless network it noticed my connection and accepted my password, but did not connect. My wireless card doesn't have linux drivers installed. I found the correct drivers, but I am unsure of the correct way to install them in Windows so they work in Ubuntu. I am currently dual booting Windows 7 and Ubuntu.
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May 10, 2010
I just upgraded to ubuntu 10.04 via the alternate cd ISO image. I can log in to Ubuntu with my old password but sometimes, when i have to grant extra privileges, that same password doesn't work. I also get a small message saying the pass word I use to loging and the one used for 'keyring' are different. what's wrong? Is there any way I can correct this?
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Jan 10, 2011
what can I do if I changed my ubuntu password and cant remember what it is?I only have 1 user on my system - me, and I changed the password today, thinking it was obvious to remember my new password, but I cant remember it exactly
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Feb 23, 2010
So Pidgin was workign just fine in Ubuntu Studio karmic... After i Changed my password for my msn IM for security reasons it just woun't sign me in.
Iv tried so many times, my pass is correct... But i keep getting this message
"NEW MSN account
Authentication failed
Edit Account"
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May 17, 2011
I need to create a script that returns a list of the users who have never changed their password from /etc/shadow.
As I know on linux there is a command "chage" used for find last password change. Any idea about solaris command?
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Jul 14, 2010
yesterday I try to update my system to 11.2 After that my GNOME didnt start in automatic mode ( I`m not able to start GNOME by hanD) What I have to do?
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Apr 4, 2009
I use FC9. Yesterday after system update I turned of the computer, but today when it booted the wireless didn't work, ndiswrapper device wlan0:1 does not seem to be present, delaying initialization.I have removed and again installed the wireless driver and looks like it is ok,
[root@localhost utils]# ./ndiswrapper -r bcmwl6
[root@localhost utils]# ./ndiswrapper -i /fatfs/Archiv/Softwere/Drivers/Dr_software/bcmwl6.inf
installing bcmwl6 ...
[root@localhost utils]#
after ndiwwrapper -m
it gives warning( or error )[root@localhost utils]# ./ndiswrapper -m
module configuration already contains alias directive
[Code]....
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