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

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65 views

Is it possible to create a locked down 'dumb terminal' with ubuntu?

My company has a large amount of document review work that must be done manually by temp workers. The work is done on our website, accessible via VPN only. We are planning to just show scanned images ...
6
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1answer
91 views

Disallow user access to microphone

Blacklisting a kernel module would disable the microphone for all users. I have set up a restricted user, who should not be able to use the microphone. The restricted user should, however be able to ...
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3answers
273 views

How can I create a hardened Virtualbox image for PenTesting?

As a serious security researcher, I'm looking for an answer to securing a ubuntu installation against unwanted intrusion. This should include how I can: log and alert remote connection attempts Log ...
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1answer
7k views

Ubuntu - saying your security settings have blocked an application from running with an out-of-date version of java

I have this new problem since 2014 begin. I cant remotely login to this enterprise network for giving them support. Its keep showing this new error. How to fix it please? EDIT:
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2answers
6k views

How to install up-to-date virus scanner ClamAv in 12.04? [duplicate]

ClamAV is in the official security software repositories from Canonical, but on running freshclam, it reports: ClamAV update process started at Tue Jan 21 10:31:59 2014 WARNING: Your ClamAV ...
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1answer
2k views

How to get Avast! Running on Ubuntu 13.10

I know in the current time, anti-virus isn’t exactly needed for Linux,however I still wish to install some form of protective layer. I had previously downloaded a .deb for the installation of Avast! ...
11
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1answer
337 views

Strange POST requests to my Ubuntu server - am I in trouble?

I have an Ubuntu Server 12.04 installed on a VM. This server has apache2-mpm-prefork and libapache2-mod-php5 installed. I was looking through the logs and recently came across these rather ...
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1answer
50 views

Ubuntu One-related question - How to share files securely?

I have procrastinated this question a lot because I know it is a complex and a "crossover". That's why I have hesitated if to ask it here, on Ask Ubuntu, or somewhere else, let's say, Freelancer or ...
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2answers
8k views

Help! My server has been hacked - .IptabLes and .IptabLex in /boot [closed]

I'm running a Ubuntu 6.06 dapper server and it has been hacked. I'll admit up front here that I'm a programmer and not a system administrator so even though I've worked with Unix/Linux for years my ...
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1answer
324 views

What is a TCP wrapper and how do I use it? [closed]

What is a "TCP wrapper", and how can I use it to improve system security?
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1answer
41 views

Unsecured desktop sharing

Can anyone advise me of the best way to get around mongrel hackers. I came home to find my mouse pointer merrily moving across the screen, opening disgusting web pages and what looked like trying to ...
6
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3answers
974 views

How safe is it to transfer sensitive information over Tor Browser Bundle on a restricted network?

I am using the Tor Browser Bundle in Ubuntu from a client machine on a restricted network. In part, I do this because it appears that TBB's native encryption allows me to bypass certain network ...
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1answer
224 views

is adobe flash player plugin installer marked as “important security update”?

Why is adobe flash player plugin installer marked as "important security update"? Is security really compromised if one does not install that?
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1answer
112 views

How vulnerable are you by installing a desktop on Ubuntu Server? [duplicate]

I've read around that installing an Ubuntu desktop on top of an Ubuntu Server provides security holes and performance issues. But I can't find anywhere as to describe what security holes would develop ...
2
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1answer
1k views

How to protect my PC from netcut users? (ARP spoof)

In my campus, some people they are using netcut in Windows and they are blocking us not to use Internet. Since I am a Ubuntu user, I can't install neither nutcut nor netcut-defender to protect and ...
0
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3answers
760 views

do i need an antivirus?will mcafee work on ubuntu? [duplicate]

i want to know if mcafee anti virus and firewall will work on ubuntu 12.04.3 if not what is recommended. i have noticed web pages locking and reporting FBI Virus, if ubuntu is safe how does my browser ...
2
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1answer
183 views

Is it necessary to have a Firewall in Ubuntu?

I was wondering if a Firewall could give some more security, and if yes which one would you recommend.
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0answers
52 views

How to disable Pointer Obfuscation on 12.04

I am working on a security project for school and need to overflow a buffer, I therefore need to overwrite the eip, but for some reason I can't. The A's that I overwrite the buffer with are spread all ...
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1answer
29 views

Key security fixes - pace of adoption into 12.04 LTS

I would like to ask about how quickly security issues are dealt with in the 12.04 disti. I am recently using GnuPG on my 12.04 box and am concerned that the following security fix / most up to date ...
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1answer
334 views

vmware player bridged does not work when on vpn

The problem I am having now is I vpn off from my job to a vpn provider. I then load my kali linux vm and connect to the vpn my security labs. I can run scans, enumerations etc. The problem is when I ...
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0answers
242 views

Unknown failed password logs

I decided to install steam on ubuntu 12.04 from the official repo. However after the installation(which required me to enter my password a second time in a terminal to install required updates) I ...
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1answer
52 views

Security measures for Thunderbird and Pidgin

I want to install Thunderbird and Pidgin. Is it safe to give passwords in these applications. Please tell me what security measures should be taken while using these kinds of applications.
3
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2answers
451 views

Is enabling TRIM on an encrypted SSD a security risk?

I recently installed Ubuntu 13.10 on an SSD drive using the "encrypt the new Ubuntu installation for security" option. I wanted to enable TRIM, so was following the guide provided here. One step says ...
2
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1answer
127 views

Default resource cap on root user

I happened to see that on my Ubuntu 12.04 some resources of the root user is capped. I have not capped anything explicitly and my limits.conf as far as root user is concerned is empty. Here is the ...
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1answer
94 views

Is there a way to encrypt my files without full disk encryption

I want to encrypt my files and folders without full disk encryption and encrypted volumes. Can anyone help me?
0
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1answer
60 views

How can I check if an Apport report does not contain any sensitive information?

I know the crash reports are stored at /var/crash. But can I do something to check that the report does not contain any sensitive information? Where can I find the list of reports that I or other ...
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0answers
47 views

Secure a samba print server in 12.04

I set up a sambda server on my router, and can access it with ubuntu. I installed the following applications to see the share: $ sudo apt-get install samba samba-common system-config-samba ...
0
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1answer
136 views

How can I disable the Terminal Emulator for certain users?

How to prevent specific users from using the terminal emulator?! I make a trick by writing a script in .bashrc which request a user to enter a password to be able to use the terminal emulator. But ...
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2answers
94 views

How can ending process introduce security risk?

I get this message when ending tasks in System Monitor: I understand ending processes will remove data in memory and break its current session, but how can ending a process create a security risk?? ...
3
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3answers
2k views

What do sapd, skysapd, sksapd, and ksapd do?

Does anyone know what sapd, skysapd, sksapd, ksapd do? Are they viruses? I tried clamav it didn't recognized them as viruses. I also realized that my /etc/rc.local has multiple copies of this: ...
2
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2answers
320 views

UFW and firewall

So I recently installed ubuntu and I have been working with it no problem.While browsing through the security guides (specifically: https://wiki.ubuntu.com/BasicSecurity) I noticed this: "enable the ...
0
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1answer
19 views

Restricting certain actions in a directory

So i have a web project, its a website that gives certain problems and the users try to find a solution using the C language, the compiling process is done by PHP, what i want to know is how can i ...
2
votes
2answers
294 views

Functional ubuntu-touch lock screen

Is a functional lock screen (e.g. pin or password) for Ubuntu Touch being developed? The nearest thing I could find was a design mockup from July with a hardcoded password ...
0
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1answer
86 views

Why Ubuntu doesn't upgrade to the latest version of GnuPG?

Two days ago GnuPG announced the release of a new stable version. The new version is 1.4.16 but the repository of Ubuntu Saucy have 1.4.14. I don't understand this because the new release cover a ...
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2answers
424 views

How to protect from cloning?

I have no experience using Ubuntu before I'm doing a point of sale project for a restaurant which will run in local Lan (offline not online). I will setup one mini PC as an Ubuntu web server. and my ...
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0answers
67 views

How do I get a list of connected IP's without having root access?

I've become a target from a hacker that I have encountered in a video game. I have become a target of relentless attacks from multiple directions. As a countermeasure, I've installed UFW and have ran ...
0
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1answer
370 views

Cannot connect to Wifi with WPA2 AES Encryption Security

I am using Ubuntu 12.04 and I am having a problem in connecting to the Router with WPA2 Security with AES Encryption. I am able to connect to that Router using my cellphone, Windows PC but my Ubuntu ...
0
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1answer
130 views

can not paste or make new folder on file system directly with out gksudo nautilus?

I have installed ubuntu 12.04, But I can not paste or make new folder in File system, however I can paste new files with gksudo nautilus, but how can i do directly without gksudo nautilus??
13
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2answers
464 views

Does linux have a signature system for executables?

Windows has a signature system which allows you to make sure that an executable hasn't been modified after it has been signed. I used to use this as a security measure in Windows. Does linux have ...
1
vote
1answer
85 views

Why it is important to Securing /dev/shm and /tmp

I see a lot of blogs talking about security and specially how to secure /dev/shm and /tmp I would like to know why it is important to secure these folders?
0
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2answers
687 views

How do I set a password for guest login? [duplicate]

I'd like to set a password for the guest account. How can I do this? (This question is not answered under the similar question in this forum, see below.) The last time this was asked on this forum ...
2
votes
2answers
852 views

Untrusted Application Launcher

So I'm trying to create a desktop icon for an application, and I dragged it from the top-left menu (I think it's called Dash or something). I clicked on it and it says it is untrusted and refuse to ...
0
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2answers
50 views

Security question. Ubuntu installation on windows PC

I am installing Ubuntu alongside windows 7 because I believe Ubuntu is more secure (in terms of viruses, spyware etc). So the computer will be contain both OSs. In such a situation, is Ubuntu still as ...
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3answers
665 views

Does ubuntu allow users to run ESET Smart Security?

Does ubuntu allow users to run ESET Smart Security? I am considering upgrading ubuntu from Windows 7 but I'm not sure if it allows the use of outside security programs.
2
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1answer
83 views

What checks should be used when installling non-repository or offline software?

Case 1) Let's say some software isn't available in the repositories and you have to download it from a website and install it. Case 2) You have downloaded a DRM free paid software but can no longer ...
3
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3answers
11k views

upgraded to 13.04 now getting JREDetection "Your security settings have blocked an untrusted application from running

I upgraded Ubuntu 12.10 to 13.04 upgraded java to 1.8.0-ea-b118 and still cannot run my application to connect to my office. I have checked all the options and spent all day looking for hits on this ...
2
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0answers
249 views

Upgrade Apache 2.22 to a version that supports ECDHE

I'm trying to setup my Ubuntu 12.04 server installation to support perfect forward security. It seems that the default Apache 2.2.22 build does not support ECDHE. Any suggestions on a good way to ...
3
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1answer
661 views

Security and Ubuntu [closed]

I have used Linux before (Ubuntu 13.04), but I have moved back to Windows after having compatibility issues with Windows programs ex. AutoCAD and ProEngineer Wildfire. However, I tried using Linux ...
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2answers
69 views

can i prevent my system reading any USB files?

i have some computers around me. i don't want any one to insert any usb. Am afraid someone has malware in the usb when inserting in one computer it will infect the others becouse they are connected ...
0
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1answer
74 views

Are there any security problems to running an http server using Python's built in module?

I have a presentation to make to a few people. It's interactive with python CGI scripts. Are there any security problems with using python3 -m http.server --cgi 8000? Each person will be using their ...