Ubuntu :: Massive Security Breach - Login Screen Lost

Jun 30, 2010

I've had a password on my 10.04 installation since I installed it (when it was released) and since last week it has disappeared. My computer seems to log in automatically. When I check the login screen settings, it is set to "show the screen for choosing who will log in".

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Security :: Mod_security And PCI-DSS Compliance With Breach Security's Enhanced Rule Set

Jul 19, 2010

Currently I'm looking into implementing mod_security on all our apache servers. The installation on CentOS 5.5 comes directly with the "Core Rule Set" by the mod_security devs (curiously Debian and Ubuntu do not carry these) They also offer the Enhanced Rule Set for mod_security in a commercial package [URL] The main point there in their info link is the first point

Quote:

Tracking Credit Card Usage as required by the Payment Card Industry Data Security Standard However acc. to this wiki article ( http://en.wikipedia.org/wiki/Payment...urity_Standard ) that specific requirement isn't stated anywhere, as well as my colleague who's working on the PCI-DSS compliance for our code/servers/etc. mentioned that he hasn't heard of this specific requirement either. So my question would be if anyone has any experience with their ERS package and if it's needed for the PCI-DSS compliance compared to the requirements given in bullet points @ wiki article.

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Ubuntu Security :: Updated Browsers Using Update Manager Have Lost Security Login Pages For Web Mail?

Mar 3, 2011

i updated both browsers i have and lost my secure log-in pages (no padlocks showing ) concerning different Web mail accounts.Just before i did these updates i checked an unrelated thing on-line regarding my sound card of which i kept a copy of and got this message below :

!!ALSA/HDA dmesg
!!------------------
[ 12.762633] cfg80211: Calling CRDA for country: AM

[code]....

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Ubuntu Security :: Tor Users Urged To Update In Wake Of Breach

Jan 21, 2010

If you use Tor, you're cautioned to update now due to a security breach. In a message:URL.. on the Tor mailing list dated Jan 20, 2010, Tor developer Roger Dingledine outlines the issue and why you should upgrade to Tor 0.2.1.22 or 0.2.2.7-alpha now: "In early January we discovered that two of the seven directory authorities were compromised (moria1 and gabelmoo), along with metrics.torproject.org, a new server we'd recently set up to serve metrics data and graphs. The three servers have since been reinstalled with service migrated to other servers." Tor users should visit the download page and update ASAP!URL...

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Debian Configuration :: Root Attacks Due To Security Breach In Exim4?

Jan 21, 2011

My debian server has been attacked due to a security breach in exim4 4.69-9 (probably applies to loads of other versions too). The security breach allows the attacker to get root access by creating a buffer overflow in a header which then can be used to inject code.

[URL]

The securtiy breach is fixed with 4.69-9+lenny1 I want to share my actions with you on what I did to (hopefully) get rid of it. However at the time of writing this, the above website is down due to too much load (DDOS Attack?). How you can check if you've been attacked:

The attack creates a buffer overflow in exim4, which results in paniclog entries.

$ cat /var/log/exim4/paniclog
2010-12-17 07:34:11 string too large in xxxyyy()
2010-12-19 10:42:10 string too large in xxxyyy()

this would be an example of two attacks. One on 2010-12-17 and the other two days later 2010-12-19.with this information you can start find potentially infected files. There may be a better way, but I searched for them with this command:

$ find / -mtime 31 2>/dev/null # files,directories,links created 31 days ago (i.e. 2010-12-17)

My infected files:

/usr/bin/uptime
/usr/bin/pwdx
/usr/bin/slabtop

[code]....

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General :: Lost Login Screen On Ubuntu 10.04?

Apr 24, 2011

I've got a problem on my Ubuntu 10.04. The login screen disapeared, and all that remains is the default background. I mean, the computer turns on normallyut when it gets to the screen where there should be the users names to login there's only the background. Is it possible to reconfigure that anyway

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Ubuntu Security :: Startup Login Screen Security?

Aug 27, 2010

just migrated to Lucid from Jaunty and noticed that the login startup screen looks more like windoze (shows all authorized users).One of the endearing security checks with Unix was that if you had access to a console you had guess both userid AND password - the system wouldn't tell you which was wrong.I feel that we have lowered security by making the list of authorized users visible on a console. Is there any way to turn it off and force users to enter both userid and password?

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General :: Messed Up And Lost Graphical Desktop And Login Screen?

Jun 14, 2010

I was in the middle of deleting the Xine movie player, and clicked a box wrong. I lost everything possible on the graphical desktop as well as a log in screen for Ubuntu 9.10 (karmic). Since then I did a few things:1. apt-get install ubuntu-desktop2. apt-get install kubuntu-desktop3. apt-get remove kubuntu-desktopAfter all this, I still have the login screen for Kubuntu. But I don't want that. I want to get back to the Ubuntu login screen, and the orange colored desktop. Right now -- after I log in -- I only have a terminal to use. And I have the blue background of Kubuntu. What do I need to do to get rid of the Kubuntu graphics and back to my original login screen, plus the Ubuntu (karmic) graphics and toolbars / menus?

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OpenSUSE Hardware :: Login Screen Lost After Installing Nvidia Drivers?

Feb 13, 2011

This is my first time with openSuse as I have heard that openSuse is better forlaptops then ubuntu is. On this laptop, I had already installed ubuntu but decided I no longer liked ubuntu very much, but for no real reason. I encountered almost the exact same problem using both ubuntu and kubuntu, but I had more problems on top of the graphical problem - so I decided to give openSuse a try. I love it so far!Anyway, to the point - I have an Nvidia GeForce GT330M. I have tried installing the drivers the "easy way" and the "hard way" and I have even used the script lnvhw, all to no avail.

What seems to happen is that, after I install the drivers (from runlevel 3, of course), as soon as I restart my computer it initially loads just fine. However, after the loading bar shows up, I get dropped into a console login (tty1), and tty7 & 8 show absolutely nothing, except a blinking cursor.I have two graphic cards in my computer -- an Intel HD card. This is loaded normally and, from "My Computer" it is the graphics card in use, as far as I can tell. The other, as I said, is the nVidia GeForce GT 330M. I'm not much of a "power" user, so I'm not really sure where to start with finding the issue

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Ubuntu Installation :: Screen Chantges To Massive Amount Of Colored Static

May 15, 2010

ive been trying to install 10.4 as a fresh install from a LiveCD. I downloaded the 64 bit ISO (I use Win7x64 normally, my processer is a core2 duo 2.2ghz or something along those lines), booted it up, and it starts loading. after a while, the screen chantges to a massive amount of coloured static. I tried reburning the disc, but it made no difference. Im now redownloading the file and the 32bit version too. Is this a problem anyone else has had, and if it is, is there any way to solve it? I would really like to use the 64 bit version.

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Ubuntu Security :: Locked-Screen Login Window Vulnerability?

May 12, 2010

I've got an HP Netbook with Jaunty installed, and I've got an older Dell laptop running Debian.A friend of mine, on several occasions, has told me that when I left my computers unattended he could do some kind of series of key-strokes, and then a window comes up and he says that he can change the password for my account.I've asked him to show me how he does it, but he never will because he doesn't want me to be able to thwart himIs he lying, or is it for real? if it's for real, how do I go about changing it so that it can't happen anymore?

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Ubuntu Security :: Automatic Login With Enforced Screen Lock

Aug 30, 2010

Is there a way to set Linux to automatically log in to a specific user account and at the same time lock the screen? I want to save time and trigger various software that always should start up on boot, while leaving the computer unattended during startup (extra important and practical for remote control boots), by enforcing a 'screen lock' so that no-one can see what happens behind the login screen without entering the login credentials.

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Fedora Security :: Hide Username In Login Screen - GDM

Jul 29, 2009

Is there any way to hide my username in login screen (GDM)? I ask this because in Ubuntu I have seen that you need manually enter your username.

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Ubuntu :: Login To Xfce The Screen Goes Black - Flickers A Few Times Then It Brings Back To The Login Screen

Apr 12, 2011

My last setup (years ago) ran fluxbox so because it was familiar I installed it as a secondary to xfce right off the bat. I download a lot of different stuff because I like to try out all the apps I can find but somewhere I broke something. I can still run fluxbox fine, but nither the Xubuntu nor Xfce sessions will run now. Last thing I remember changing was pulse audio(removed it for an experiment I was trying with jack audio), not sure if it is connected but when I try to login to xfce the screen goes black, flickers a few times then it brings me back to the login screen.

I tried failsafe but everytime I do my monitor gives me a "frequency out of range" error. I tried purging and reinstalling xubuntu desktop and xfce settings but I am thinking its my xorg config. My laptop is a Toshiba satellite M305D-s4830 with ATI Radeon 3100 mobile graphics card and I am running Xubuntu 10.10. Unfortunately I also broke the screen, so right now I am stuck with an external monitor till I get a new one.

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Ubuntu Security :: Rebooting From Windows - When X Is Starting Up Before The Login Screen Comes Up It Will Flash A Screenshot From Windows

Oct 31, 2010

I have a dual-boot with windows and linux. Sometimes if I reboot from windows into linux, I notice that when X is starting up before the login screen comes up it will flash a screenshot from Windows. Has anyone ever noticed this?

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Fedora :: Cannot Login Into X Window(screen Turn To Black Before Login Screen)?

Feb 25, 2011

The problem come after i kill the Xorg using the kill command,and the screen turns to black without anything so that i can do nothing. The problem goes on after reboot

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OpenSUSE Install :: Login Screen Keeps Bouncing Back To Login Screen

Sep 17, 2010

I have installed VirtualBox and setup a Windows Vista host, initially with a .vdi of 10gb. That filled up quickly, so I added another 20gb secondary partition, after first trying to allocate a .vdi to a SCSI controller. Configured the drive in Windows (Computer Management), and all seemed ok. I shutdown VB, and rebooted my Linux host (openSuse 11.3). Now I keep bouncing back to the login screen, and can't login to Linux KDE, but can login to a console.I do have the following info:

/etc/fstab:
/dev/dis/by-id/ata-ST9250410ASG_5VG0B5VS-part5 swap swap defaults 0 0
/dev/dis/by-id/ata-ST9250410ASG_5VG0B5VS-part6 / ext4 acl,user_xattr 1 1

[code]....

I did see a message before, that I don't see anymore, that said it could not start NFS services due to missing entry in fstab. Another I'm seeing now is it couldn't start the avahi-daemon, no space left on device. This is odd, since I have a 200GB drive, with half of it left, only max 30GB set to VB. Here's my df -k output:

/dev/sda6 Use% is 100%
devtmpfs Use% is 1%
tmpfs Use% is 1%
/dev/sda7 Use% is 46%

So root "/" is mounted on /dev/sda6, which looks like it could be a problem, but why would this suddenly be a problem after working with VirtualBox? Could this be a matter of just freeing up space on /dev/sda6? Like the /tmp folder that's under "/"?

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Ubuntu :: Cant Login Into Hardy...Screen Hangs Up At Login Screen?

Dec 22, 2008

I have a desktop running Hardy and till friday it was running good. Today is monday and I guess it has got monday blues like I get every monday at work.Today I tried to start it as usual but it just refused to go further than login screen. I just can not login. It just hangs it there. I do not know what has gone wrong. I did not change anything since friday and no one else uses it. Theres nothing in logs that could give any idea. It just hangs without any reason and is still on the login screen for ever. It does ask my username and password but then it does not go further.But to my surprise I tried logging in with root and it gave me expected error that system administrator is not allowed to login from gnome.

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General :: GNU Screen - Unable To Reattach To Screen After Lost Connection?

Jan 1, 2011

I was using irssi in screen but lost connection. After I ssh'd back in to the server, I can no longer attach to that screen. screen -ls shows that the screen is already attached. I tried screen -D to force detach it, and it said detach but screen -ls still says it's attached. I tried screen -x and it just hangs there.

[sub@server ~]$ screen -ls
There are screens on:
4033.poe (Detached)
7728.irssi (Attached)
2 Sockets in /var/run/screen/S-sub.What can I do now?

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Ubuntu Security :: Login Panel Is Worse From Security View Point

Jan 19, 2010

ubuntu 9.10 login panel is worse with respect to ubuntu 8 since now all the users with names are shown without a way to hide them!Why don't keep the old way at least as an option?

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Ubuntu Security :: Bad Login Protocols - Graphical Login For Gnome Sizes Itself To Accommodate A User's Exact Password Length

Dec 14, 2010

I'm seeing really bad user login format under a standard installation and am wondering why ubuntu does this as default. I have noticed that the graphical login for gnome sizes itself to accommodate a user's exact password length. This indicates to me that somewhere on the unencrypted part of a standard installation with user encryption contains at least some indication of the content of the password length which seems a security flaw even if not a complete hole, it majorly reduces the number of attempts a cracker would have to cycle through.

And that's assuming that *only* the length is contained. Furthermore it seems that it would be MUCH better to simply display the number of characters entered into the pw field and allowing the gui to expand itself from an fixed size as the field is filled out so the the user still receives visual feedback for entering characters. Either a simple character count display should be entered into the field or a 10 dot to new line so that one can visually quickly count the number enter by multiplying from a 10base graphical observation.

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Ubuntu Security :: Security E-mails At Root Login?

Sep 8, 2010

Whenever I login as root, an e-mail with the subject "Security information" is sent outwhere the e-mail address for this message is configured? I need to change it (or perhaps disable it).

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Ubuntu :: Lost Everything On Desktop After Login

Sep 13, 2010

I have been having difficulties with my HDD for a while, that said every now n then I'll had to put my ubuntu cd and do fsck periodically. But today things didn't went so well, after I did it when I logged in everything I had on my desktop was lost not, sure if more things were lost haven't check yet. But so far everything is good.

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Ubuntu Installation :: Root Login Lost The 2.6.26-2-686

Feb 1, 2010

I have logged on as chris; sudo su to get root access. I have done:

apt-get update
apt-get upgrade

my previous versions of ubuntu have been removed from the grub menu.I can not now log on as chris and sudo su to root from ssh. It says I am missing from sudoers file.Is there an easy way to fix as I can not access the master screen and will have to talk my wife through the changes required.

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Ubuntu Installation :: Unplanned Visits To Login Window - Taken To Login Screen Three Times

Aug 18, 2010

I have used Ubuntu since 7-4; I now have 10.4. However, in the last week I have been taken to the login screen three times. This could be potentially calamitous. Ctrl+Alt +Backspace have by default been disable since 9-4. There is no way I am pressing atl+Prtscr +K. I wonder if there is a new zap command in 10.4, and if so, how to disable it. I have never found the need to go back back to the login window. I am generally using the command line when doing this.

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Ubuntu :: Unable To Login / After Couple Seconds Returned To The Login Splash Screen?

Oct 10, 2010

I recently powered up my netbook... Selected my user log in, entered my password, and after a couple seconds I briefly see what looks to be the console and am returned to the login splash screen... I can Ctrl+Alt+F2 to get to the console and log in... but that is as far as I can get. This is the case for Gnome, Remix, and Remix 2D.

I can sudo apt-get (update, upgrade, etc) as well. It is the right password because if I type in a wrong one it presents an authentication failure dialog box.

How can I fix my log in screen and get to my desktop? I am Currently running 10.04.... waiting to get 10.10

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Ubuntu :: Slim Login Manager Preventing Computer From Booting To Login Screen

Aug 4, 2011

yesterday i installed slim login manager on my computer (eee pc 1018p, ubuntu 11.04), and now it cannot get passed the ubuntu loading screen (with orange dots underneath) when booting. i tried booting into recovery mode and that didn't work either. i also left the computer trying to boot overnight and that didn't work.
basically, during this loading screen that should eventually bring you to the login screen, i can alt+tab to see the progress of the load. the progress is stuck on

Is there anything I can do from grub to remove slim?or, is there any way I can access my ubuntu partition and save all my files?

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Ubuntu :: Login - Enter My Password To Login The Screen Becomes Black And Return Me Again

Apr 15, 2011

I just bought this desktop from my friend and it runs win 7 and ubuntu 10.04. it worked very well the first two days until I changed the hostname of the system.

I did like: hostname myNewName

And everything worked fine. The problem now is when I start ubuntu and and reach username and password screen , I enter my password to login the screen becomes black and return me again to the screen where I put my password again. If I entered wrong password , the system message stating wrong password. On the other hand, when I try to run ubuntu from live-cd I can login easily and access my account.

My friend told me he removed Naultius package and reinstall it for some reason before he gave it to me. Note windows 7 is working properly.

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Ubuntu Installation :: 9.10: Login In Just Brings Me Back To Login Screen?

Jun 5, 2010

I have just did an upgrade from 9.04 to 9.10. I am planning to go to 10.04 . After the upgrade everything was ok but I noticed the GRUB was still legacy. So I updated my GRUB to GRUB2. Now when I boot, after entering my logon-id and password, it just brings me back to the login-id screen (to logon on). Any indication of what is wrong and how I should fix this ?

I have no encryptions. [added comments] Currently reading thread about login loop bug with 9.10 Followed instructions about possible missing pre-release update but even if it did do updates, I am still login screen looping. Doing additional researches until someone answers with the fix.
did :
CTRL + ALT + F1 switch to one virtual console
sudo service gdm stop

[Code]...

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Ubuntu :: Login But Almost Immediately Kicks Back To The Login Screen?

Sep 28, 2010

When I try to login with my username, the one I created when I installed the OS, it seems to try to login but almost immediately kicks back to the login screen. No authentication error it just seems to just logout? The only change I made since last successful login was to add ". .alias" to the .profile file - the only entries in the .alias file are comments and "alias" commands. I have one other username but it is not in the sudo's list of users so I can not change anything in the master login.

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