Security covers a wide-ranging set of topics including Users, Permissions, Authentication, Authorisation, Upgrades, Firewalling, Hardening, etc.

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1answer
4k views

Sync KeePassX with KeePass2

Simply put: In Ubuntu I am using KeePassX and in Windows KeePass2. In am not able to export/import passwords from one to another. I would prefer to use the same database, but I don't really know ...
1
vote
1answer
276 views

Ubuntu security with services running from /opt

It took me a while to understand what's going on here (I think), but can someone explain to me if there are security risks with regards to my logic of what's going on here as I am trying to set up a ...
0
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1answer
156 views

samhain troubleshooting and performance

I am new user to Samhain so don't know much about it except the fact why its used. Now I am finding my samhain-2.8.5 is consuming too much of CPU. Its almost eating up 2 cores and I cant find the ...
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2answers
111 views

Is it secure to run windows application on linux? [duplicate]

Possible Duplicate: Risks/Disadvantages associated with Wine I wanted to run windows applications on ubuntu. So i installed winehq. My question is that, is it secure to run windows ...
16
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9answers
12k views

Access Prompt keeps asking for GMail password

A pop up keeping appearing in Ubuntu (running 12.10), asking for the password to my gmail account. The icon has a silver shield, and it is labeled Access Prompt. The actual window has an image of ...
2
votes
1answer
835 views

CUPS: Restrict printer access to trusted users on network

I would like to share my printer (connected to my computer with USB) with my colleague though our network. I am very concerned with security issues and I don't want to do anything that could ...
8
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3answers
2k views

How to access an OS X keychain via Ubuntu

I need to access some of the content of an old OS X keychain. I know the password - this isn't about cracking ;-) What I don't have is a Mac. I do have the keychain files on a backup drive. Is ...
1
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0answers
181 views

Ubuntu all versions from 10.04 till 12.10 [closed]

Is simply enabling the firewall ufw (sudo ufw enable) sufficient enough for protection of the OS ? I mean should extra rules be added for 'better' protection, or is simply enabling the firewall enough ...
3
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2answers
649 views

Adobe Flash Player 11.2 Security?

The most recent Flash Player for Windows is 11.4.x, for Linux it is 11.2.x. Are there already any security issues? Are security patches still released for the Linux versions?
2
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1answer
56 views

What part of the update manager do you have sift through for, to avoid errors in one's system?

Are the updates on the update manager all by Ubuntu? What part of the update manager do you have sift through for, to avoid errors in one's system? Thanks.
3
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2answers
96 views

What security exist when sharing files via an external USB drive?

We have several external sources that send us data via an external hard drive. What security risks are we exposing ourselves to?
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1answer
2k views

How to sudo visudo without a password, remove all prompts for password [closed]

Websites tell me to use sudo when I have no password, usually tell me one of two things. It is bad security Or use 'sudo visudo' and the %admin ALL=(ALL) NOPASSWD: ALL line I would like to not ...
11
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3answers
41k views

What are the Major Differences between Ubuntu 12.04 and 12.10 in terms of Security? [closed]

I use Ubuntu 12.04. Recently, 12.10 was released. I'd like to upgrade but I want know what the benefits are in using Ubuntu 12.10 over Ubuntu 12.04 first. My requirement is here Security , is there ...
3
votes
1answer
451 views

How to manage security cameras in Ubuntu?

I am setting up a server and chose ubuntu for the OS. The system will have 3 purposes, storing my wife's photography work, storing music for quick access to our entertainment system (will be running ...
5
votes
2answers
191 views

Is There A Security Risk With Users That Are Also Groups?

I know a little about users and groups; in the past I might have had a group like 'DBAS' or 'ADMINS' and I'd add individual users to each group... But I was surprised to learn I could add users to ...
0
votes
2answers
855 views

Why does the Software Centre ask me to install untrusted packages?

I am trying to install Darktable on my Ubuntu 12.04 64bit desktop computer. When I attempt to install it through the Ubuntu Software Centre I get a warning: "Requires installation of untrusted ...
2
votes
1answer
714 views

How would I know if my OS is compromised?

I had opened a php folder from a friend's web host. I run it on mine to fix some bugs. Then I tried attaching the code to be emailed and GMAIL stated that the attachment was infected by a virus. Now ...
7
votes
1answer
547 views

What to do about this gnome-keyring message? [duplicate]

Possible Duplicate: Why do I get this warning from Gnome keyring in Xubuntu? I upgraded from ubuntu 10.04 to 12.04 and installed lxde. Since then whenever I try to print some file (or use ...
1
vote
1answer
520 views

File permissions vulnerability in pure-ftpd using php script

I have created ftp-server using pure-ftpd following this wonderful tutorial. Everything works fine, except file access. Here is the problem. Joe's home folder is /var/www/joe and Steve's home folder ...
0
votes
2answers
2k views

How do I do a full hard drive wipe and start back with just OS, and nothing else

I am going to be getting rid of a computer and giving it to a friend. I want to wipe all documents and files, all Ubuntu mods and applications and give it to him with no data or application but the ...
6
votes
1answer
54 views

Are there Ubuntu security notices feeds for specific releases

The Ubuntu security notices web page has an option to show only notices for a single release. Is there a way to get notices for a single release as a feed, without setting it up myself? That is, is ...
0
votes
1answer
280 views

How can I connect 12.4 to the Internet with WEP key?

I have Ubuntu and I want to know how can I connect to the Internet using my WEP key for my wireless. I tried too many times but it doesn't work. I have my wireless password but it doesn't work too. ...
2
votes
3answers
4k views

Locking with USB drive [duplicate]

Possible Duplicate: Lock and Unlock from USB disk (pendrive) When i use Windows, there is a program I use called Predator that locks my PC when I remove a certain USB flash drive. It then ...
6
votes
4answers
822 views

Filesystem that gives an encrypted view of a directory—the inverse of EncFS

Currently I'm using EncFS to encrypt my directory "confidential" to ".encconfidential" and sync that encrypted directory using an online service (e.g. Dropbox, UbuntuOne etc). However my entire disk ...
8
votes
2answers
6k views

Google Authenticator for Desktop (lightdm or gdm plugin)

There has a been a similar question, but that's not exactly what I want. I'd like to know if there is a plugin, or add-on, for lightdm or gdm that allows me to authenticate using my password AND ...
28
votes
2answers
2k views

Should security updates always be installed?

We are a small shop, with no real sysadmin. So developers (Java EE) also try to maintain Ubuntu server 12.04. When I login a terminal and I see messages like: 6 packages can be updated. 6 updates ...
2
votes
3answers
322 views

GUI Tool to deny Standard users from Using CD-ROM and USBs?

As a part of security policy we need to disable CD-ROM and USB access for normal users. Only root users should have the access. I could do it by removing the user from the 'cdrom' and 'plugdev' ...
18
votes
4answers
22k views

Which free VPN providers support Ubuntu?

Can't find any free VPN provider for Ubuntu. I tried looking into old questions but they seem to be outdated.
1
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1answer
2k views

After Installation Whole Disk Encryption? 12.04

I know some fragments of this question have been asked in previous posts and I have reviewed them - however I have a more thorough question... I did not choose to do whole disk encryption when I used ...
2
votes
1answer
95 views

How do I turn on a login page for Bugzilla?

I have Bugzilla 4.2.1 running on my Ubuntu 11.10, It working as it should and everything is fine. Now when somebody accesses the URL www.myapplication.com/bugs without logging in, it allows the user ...
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1answer
1k views

Securing Ubuntu in Every Possible Way

I want to secure my Ubuntu PC from any threats (network/online to local/offline protection). What all can I do?
1
vote
1answer
447 views

Can command line arguments be masked or hidden instead of appearing in the process list?

I have written a command line application in C++ that is used to access an online user account via a SOAP API. In order to avoid having any login details written to file anywhere on my machine for ...
6
votes
1answer
3k views

How do I encrypt a dual boot system?

I have a dual-boot laptop with four partitions - Windows, swap, Ubuntu (OS) andUbuntu /home. I need to do full disk encryption on it. Ubuntu is running 12.04, Windows is Windows 7 Home Premium.
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0answers
96 views

Why can I mount and read an encrypted home from another linux installation, without asking for a password? [closed]

Not only is home directory encryption veery noticeably affecting performance on my laptop (early C2D), but I also just discovered, that I can mount and read files on that "encrypted" home when booting ...
4
votes
1answer
710 views

Is /home encryption useful on a server?

I've got a question about the use of encryption: I set up a Ubuntu 12.04 server to use it as a router, file server for backups and webserver. Of course, it is probably not the best idea to put ...
2
votes
1answer
680 views

Are world-writable folders safe?

Is it safe to chmod a directory 777, or is it a security risk? One of my scripts requires that in order to run in multi-user situations, and I'm wondering if it's okay.
51
votes
3answers
30k views

Difference between PGP and GPG

What are the main differences between PGP (Pretty Good Privacy) and GPG (GNU Privacy Guard) in relationship with security in Ubuntu and Launchpad?
2
votes
2answers
126 views

Recover from losing personal PGP

The computer I was using which is the one I used to sign the Ubuntu code of conduct got a hardware problem and I lost it. If I want to continue my work on launchpad, how can I proceed to recover, ...
7
votes
1answer
360 views

I want to use Ubuntu as a firewall and wireless AP, with some external traffic passing through openVPN, and the rest just through a firewall

I would like to do some configuration through Zentyal or a similar setup, but I am also willing to use config files. I am connecting to a commercial VPN using a username and password. I want that ...
-1
votes
2answers
445 views

Secure your private gpg and ssh keys from other people accessing ssh

There is a person A and person B, other of them has each other ssh public key, so that means they can access each others shell. now they can access each others private ssh and gpg private keys. and ...
3
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2answers
1k views

By default does RDesktop use any encryption?

When you use RDesktop to remote into another computer, is it traveling over the internet unencrypted? How secure is RDesktop, or should another application be used? Thanks
0
votes
1answer
86 views

How did all the passwords get in my login keyring?

In my Passwords and Keys application (Seahorse) I have a "login" keyring. Within that are a many keys. How did they get there? What application put them there? I use Chrome with Lastpass extension, ...
3
votes
3answers
439 views

SSH key plus password

I see there are continuous attempts to login into my computer via ssh using usernames, like joan florin root from 60.169.22.118, -how can I forbid ssh access and only allow it to users with specific ...
8
votes
1answer
1k views

Why are the proposed BADSIG (on apt-get update) fixes secure?

I'm running apt-get update, and I see errors like W: GPG error: http://us.archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic ...
8
votes
2answers
1k views

Unknown Folder on System root /.rpmdb

Can somebody explain what the /.rpmdb folder in the root directory is for? Which application creates it and is using it?
2
votes
1answer
463 views

Does Linux support capturing tcp packets without being super user?

Is it possible to capture packets without superuser? This is what I see in the wikipedia article: In some Unix-like operating systems, a user must have superuser privileges to use tcpdump ...
3
votes
1answer
188 views

Is file permission secured when it transferred from Ubuntu to Windows?

I am having 9GB text file which is encrypted . This file contains some confidential data . Which is on my system(Ubuntu) and my external HDD (ntfs) . This file get daily updated and then encrypted . ...
9
votes
2answers
5k views

What to do regarding BackDoor.Wirenet.1

What precautions should one take in prevention of attack by trojan BackDoor.Wirenet.1? Blocking all communications with 212.7.208.65 should be sufficient? If so, how to do it?
9
votes
3answers
3k views

Does java security flaw affects ubuntu also?

There are rumors about an actual java security problem. The BSI advises people to deactivate java plugins version 7 and prior in all kind of OS, even in linux. Does this mean, I should deactivate ...
5
votes
3answers
8k views

Remove or disable java due to the security issue

According to the news there's java security hole that is still not fixed. How can Ubuntu users protect their PC? I've got gnome-shell installed and as far as I understand it depends on java. Which ...