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

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Do some files downloaded from the internet have execute permission by default?

I noticed that some files downloaded from the internet have executing permission (e.g. Tor, Bit-torrent, Sync etc.) by default. Therefore the permission information is stored within the files itself, ...
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0answers
33 views

How can I improve my paxtest results?

I have AppArmor Installed, but I am willing to secure my system more, I ran a paxtest and I am not impressed by the results, how can I make my results better and make my linux system kill those stuff? ...
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1answer
282 views

basic security ubntu 12.04 LAMP server quesrions [closed]

I have a few questions about security on my ubntu 12.04 LAMP server (newbie) This is what I´ve done so far: Install and configure Firewall - ufw Secure shared memory - fstab SSH - Disable root ...
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1answer
355 views

Cannot remove script virus in Ubuntu [duplicate]

After I scan via clamav/clamtk, I found 1 possible threat that I cannot remove/quarantine. How to remove virus? Or Is this false positive? ...
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0answers
59 views

Can a weak Ubuntu user password be a risk for ONLINE security?

Can anyone gain an unauthorized remote access to my Ubuntu machine? Does having a strong user password really helps prevent this? Or firewall just doesn't let anyone in by default, regardless of the ...
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2answers
319 views

What security context software does Ubuntu use?

Does Ubuntu use SELinux by default and if not, how is security context managed? For example, allowing processes to run as root without security context can be a security risk. The help page about ...
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2answers
1k views

Does Ubuntu deliberately contaminate its binaries to help NSA? [closed]

A week ago asking this question of Microsoft or such would have got me labelled as paranoid, and asking this question about Ubuntu would have seemed plain stupid, bordering offensive. Then we found ...
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4answers
459 views

How to ensure Wine does not auto run .exe files?

I want to install Wine only for running a program, but I don't want to open any other Windows file (for security). Is it possible to ensure Wine does not execute .exe files automatically? Thank you.
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1answer
29 views

Are there any packages that do all the recommended configuration settings for a secured server environment?

I came across questions & articles like these: 1.) What Can Be Done To Secure Ubuntu Server? , 2.) How to prevent your website from getting hacked. which speak of many configuration settings for ...
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0answers
326 views

Run Java applet without granting full permissions

I have the following JRE installed: user@host:/$ java -version java version "1.7.0_25" OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.12.04.2) OpenJDK Server VM (build 23.7-b01, ...
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2answers
337 views

Which is a safe way to record Firefox passwords in Gnome Seahorse Keyring?

Searching for answers about ways to record Firefox passwords in Gnome Seahorse Keyring vault, I found severals possibilities: Firefox Gnome Keyring firefox addon from https://github.com/ in this ...
3
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1answer
316 views

Why is a group writable directory considered unsafe?

More specifically, why does libslack's daemon consider files that are being executed in a group writable directory to be "unsafe"? If you can give me an explanation of why group writable directories ...
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0answers
99 views

Good security setup in a LAMP environment

I have created a script to automate setting up my LAMP environment as well as installing some other software I find very helpful in coding. The script can be found here I only have one user "root" ...
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1answer
165 views

USB PAM login with SD Card

I am trying to set up a PAM login token. I want to use an SD card instead of a normal USB flash disk. When I run the pamusb-conf to set up a new device, with the SD card inserted, it says that there ...
1
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1answer
21 views

Is there any way to get CVE or USN ids that need to be installed?

I'm looking to pull in what CVE or USN ids that apply to a security update before doing them. Is there any way?
1
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1answer
397 views

Secure OpenERP Server

I use a Ubuntu 12.10 Desktop as a server 'only' for OpenERP 7.0. This OpenERP server is used by both, the team as well as clients. I've checked out posts that help someone secure a 'web-server' (i.e a ...
0
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1answer
141 views

Can the admin of a SSH server monitor internet traffic?

I use SSH Tunnelling + socks4/5 to browse securely, but a certain question came up in my mind, can the administrator of that SSH server monitor my traffic? like see which websites I am visiting, ...
2
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1answer
118 views

Dash icon does not work

Below is the contents in the ubuntu-software-center-desktop file. The Dash Home does not show the contents when it is opened up. The Icon is black and does not respond when you place your courser ...
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0answers
200 views

Setting Up Users and Permissions for a Multi-purpose Home Server

I have decided to repurpose an old grey box computer to be a combination NAS/home media server, headless torrent server, and minecraft server. I am using this both as a practical piece of equipment ...
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0answers
354 views

fail2ban block retry count always changes

As title mentions clearly, fail2ban block retry count always changes. I set all retry counts to 3; but sometimes it blocks me after 6 or 7 retries. How can set its behavior a constant value? I added ...
2
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1answer
3k views

How to use rsync via ssh with rsa key passphrases?

How can I use rsync with passphrases? All googled "solutions" i found use passphrase-less keys which seems no real option. i am runnning 2 ubuntu servers 12.04.2 LTS.
0
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1answer
4k views

flashplayer security doubts

I am an Ubuntu newbie and I installed Ubuntu Desktop 12.04, 64 bit. As I noticed the Firefox is the actual version, but the Adobe Flashplayer was the 11.2 version which has, I guess, some security ...
0
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1answer
36 views

Acces to my PC from hostile Access Point

I connected to a Wifi access point that had cloned my SSID. I did not enter my ubuntu password during the connection, since I did not install anything. I just used Firefox for several minutes. Is ...
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0answers
24 views

How can I find out if there is malicious code being run on my computer? [duplicate]

I have recently lent my computer to a tech-savvy acquaintance. And I gave him the root password. Doh! Is there any way I can figure out if I got a key logger installed or spyware on my Ubuntu 13.04?
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0answers
756 views

Ubuntu blocked by current security policy

I've been running Ubuntu 12.04.2 on my Lenovo IdeaPad P400 for the past few weeks and just got around to repair my Windows 8 boot. In order to access the LivCD, I had to boot in legacy mode. I ran ...
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0answers
122 views

Securing Amazon EC2 Ubuntu server

I'm about to launch a product I'm working on into alpha phase but before that I'd like to ask a bit about securing my Ubuntu server 64bit which is hosted at Amazon AWS EC2. The problem is my software ...
2
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2answers
60 views

PDF security problem

I'm looking for a program that allows me to export a document to PDF safely, so that other users can open it but can not copy or print its contents. While I used Windows I used PDF printers such as ...
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1answer
387 views

TKIP Encryption not visible

When I want to connecto to my AP whih uses Security type = WPA2 - Personal Encryption = TKIP There is no field I can enter TKIP encryption, I am asked only for Name, security type and Security key ...
0
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1answer
70 views

suspected security breach

for a few days now, i'm seeing automated .log files and folders on my home folder, they are recreated even after they are deleted, couldn't make sure the source of it... file --> ...
0
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1answer
354 views

Incoming ssh connections blocked

Hi some time back I asked this question and made a lot of changes to secure my system. Now I need to make a dummy account and give ssh access of this account to a friend. But I am unable to receive ...
2
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3answers
320 views

Are there any security suites available for Ubuntu? [duplicate]

I'm new to Ubuntu, but I've heard Linux, especially Ubuntu is an Virus Free OS. Still are there any security suites available for Ubuntu that could make it more secure? Or do I not need any extra ...
2
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2answers
43 views

is there some sort of all-purpose logging tool I can download as a package?

As in, a tool that will give me easy to read logging information all in one convenient place, divvied up into categories. Logs for say, ssh daemon, user logins/logouts and other activity, installed ...
5
votes
1answer
95 views

is it possible to make ubuntu ask for my password before mounting usb-drives?

I don't want anybody to be able to copy my files anyhow, so I am asking if it is possible to make ubuntu ask for my password before mounting usb-drives and if it is, how to do it?
7
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2answers
268 views

Security updates for the universe repository for LTS releases?

What happens if there is a security problem in a package in the universe repository four years after the 12.04 LTS release; will the package be updated from upstream, patched, or left alone? It's my ...
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0answers
91 views

Running a VPN server off Ubuntu Desktop?

I am unfamiliar with Ubuntu and Linux in general. I bought 3 old Dell PowerEdge 2650 servers off eBay for £20. I didn't really know what I was going to do with them, but for the price, they seemed ...
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5answers
2k views

Installing Internet security suite? [duplicate]

Do I need to have an Internet security suite installed on my Ubuntu or it is safe without. What recommended names if I had to get one installed ?
3
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1answer
87 views

Setting up a intrusion system

I am trying to set up a intrusion system for 12.04 LTS and was pointed in the direction of using PAM to do so. How can I setup PAM and is there any other intrusion system out there for ubuntu?
0
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1answer
32 views

How secure is root read-permissions?

How secure is a file whos permissions are set so only root has any privileges with the file? Say I had the file on an unencrypted ext4 partition, would I be able to boot up another live OS, copy the ...
0
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1answer
95 views

How can I provide a security for users access the files in Samba?

I'm creating a Samba file Server and each user with 5gb space, how can I provide a security for users access the files? like authentication and credentials?
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0answers
37 views

Security Updates for Server with no internet connection

How can I run security updates on Server 12.04LTS when the server has no internet connection. I would like to download the updates and run them on the server. any suggestions? where is the update ...
0
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2answers
513 views

verifiying ubuntu iso with repository gpg-keys

I want to verify that a downloaded iso is not being poisend by the NSA or any other immoral agent. To do this I would very much use a signing-checking way. I am aware of VerifyIsoHowto. Still I am ...
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1answer
180 views

Will Canonical disable Amazon (and similar) lenses by default [closed]

I'm using 12.04 LTS, partially because it's stable and I need my machine to be stable and reliable. I also don't wont to switch to newer versions of Ubuntu because of shopping lenses. If I decide to ...
5
votes
1answer
6k views

How to enable auto security update in Ubuntu 12.04 Server [duplicate]

When I installed the Ubuntu 12.04 Server in my VM, I chose to manually update security. My question is how can I enable it again? I know there are other packages that do auto update, but I'm just ...
2
votes
1answer
2k views

Malware and Backdoor detection Shell Script

I'm trying to build a shell script which can automatically detect malware, backdoors and rootkits and I'm trying to research for it. I found some of the things like find . -name “*.js” | xargs grep ...
3
votes
2answers
3k views

unable to delete file - rm: cannot remove Input/output error

Some file is in my NTFS file system which I can't delete. It's giving this error: rm: cannot remove `zigBqC04': Input/output error Any other files also could not be copied in that folder and ...
0
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1answer
76 views

Ubuntu Forums password.

I was wondering if anyone could tell me the format of the passwords for Ubuntu Forums. I am a member but haven't been online for quite a while and have forgotten which of my passwords I have used. If ...
2
votes
1answer
132 views

Password security: Ubuntu Forums Security Breach

If the passwords were encrypted is there really a problem? I have not used the forum for some time and can't remember the details. Advice please.
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0answers
20 views

Files which tell that someone has accessed your computer [duplicate]

I know /var/log/auth.log shows who has been using sudo commands and /home/myusername/.bash_history shows command line commands. I would like to know if there are any more files similar to these 2 ...
0
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1answer
226 views

Installing Updates selectively from command line

I have gone through forums and could not find a definitive answer for a requirement that I have. Any help would be much appreciated. I have a server machine running Ubuntu 11.10 server. When I log ...
2
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1answer
203 views

online payment safe in ubuntu 13.04

I would just like to know that is ubuntu and other linux distributions safe for online payments ?? the latest versions. generally most people want web safety . People say that ubuntu is very secure ...