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

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1answer
68 views

what is the best way to upgrade security patches on ubuntu 14.04

I am trying to upgrade security patches on production boxes. Need to know how can i plan this activity. I also need to make sure that in case something is wrong then how do i roll the updates.
0
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1answer
44 views

make my machine invisible for ping [duplicate]

I search solution to pevent my machine form the attack arp poisoning. I believe to make my device invisible for this haker If they want to ping my machine they have any reply. I don't khnow how I ...
1
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1answer
251 views

Prevent Skype resolvers getting your IP on Ubuntu

I am running Skype version 4.3.0.37 on Ubuntu 14.10, and I know that on the Windows version there is an option to only allow direct connections to your machine through Skype for Skype contacts, which ...
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0answers
15 views

Is it true that all of updates are pgp signed?

Is it true that all of updates (auto-updates) are pgp-signed so hackers cant replace them by some type of attacks? Also does a pgp-signed downloaded soft from Muon Software Center and Ubuntu Software ...
1
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1answer
16 views

Which Ubuntu Source file implements the management of the nx bit?

As I understand it, Ubuntu has a feature to set the nx bit to prevent stack smashing attacks. What source code file implements this, and during normal operations what process/data structure handles ...
1
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0answers
61 views

Initramfs suddenly speaks IPv6 but no SSH login

I have been running a configuration with an encrypted root partition and network unlock via Dropbear in initramfs for some time on my Utopic Xubuntu Mediacenter. Since I am actively using IPv6 to ...
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2answers
36 views

Help with an assignment please [closed]

I have 2 questions I'm having trouble finding info for. Q1 what are names of 2 main editions for ubuntu? Q2 name 4 security features for ubuntu.
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1answer
93 views

why does not IPv6 (RFC 4941) privacy work?

I've followed instructions on https://docs.menandmice.com/pages/viewpage.action?pageId=6361024 It simply does not work, I have no Ipv6 starting with 2001::: , only the same as before. ...
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0answers
13 views

webapps control and transparency review

there is a lack of information about this, most people just want to disable, for example what Amazon WebApp is doing ? does add referrals cookies ? does it sends any data like mouse pointer ...
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0answers
14 views

Best way to execute script from another linux user on the same system

I've set a script to be running on subdomain.domain.com mostly for security by isolation reasons. I need to include some output of it at domain.com. The thing is it uses ajax and hence cross-domain ...
16
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7answers
3k views

What non malicious uses are there for ping's flood (-f) option? [closed]

I have been reading up on common ways in which people attack each other on the internet through things like DDOS attacks etc, and how one would defend oneself from such attacks, and I have come across ...
1
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2answers
72 views

Is there a place to check for security of repositories?

I wanted to add some themes from sudo add-apt-repository ppa:noobslab/themes. How do I ensure these are safe repos? They are listed in many blogs and answers, however is there an official place I ...
0
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1answer
127 views

Macbuntu noobslab security

Is this site safe? Being sort of a security nut, im Wondering if it is safe to install Macbuntu theme, and icon pack from noobslab.com.I have would not be installing any of the other things (lightdm, ...
2
votes
1answer
297 views

How can I be sure that I'm using NTP version 4.2.8p1 or equivalent?

I've recently read about the vulnerabilities within ntp, here which can be closed by installing ntp version 4.2.8p1. However, I've used apt-get to install the latest version of ntp, on an Ubuntu ...
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1answer
50 views

Cannot install Kernel Security updates in 14.10

I cannot install some security updates to Ubuntu 14.10 (Utopic Unicorn) 64bit, which are kernel updates. Those are the updates. I cannot install them. In settings, I have everything ticked. ...
1
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0answers
211 views

Is there a VPN Monitor/Kill Switch application for Ubuntu?

Hi I am looking for a VPN Monitor/Kill Switch application that will ensure my VPN connection is always connected. Should my secured connection drop, the application will drop the applications that ...
1
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0answers
19 views

Ubuntu server File copy detect

I have a customer who has experienced data file theft (copied filed) is there software or a way to detect this copying of multiple files Or do i have to write something?
0
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1answer
25 views

Keyboard / usb detachment alert?

I'm in a fun security-battle with a co-worker, where we each try to attach each others system in order to send out an email to all other co-workers in which they are invited to come and have a sweet ...
1
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1answer
50 views

apparmor aa-logprof not asking about all dependencies

In trying to write an apparmor profile for my python-flask app (which executes via gunicorn) I can't get aa-logprof to ask me about all the dependencies. If in complain mode the application works as ...
2
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2answers
72 views

Is it possible to restrict a program from reading anything outside what they need?

I understand that running programs as a non-root user is done in order to restrict the programs from writing system files, which prevents malware from compromising the system security. But in most ...
3
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2answers
165 views

How to make firefox ask for master password only when trying to show passwords

I have set up a master password on firefox and the browser asks for it at unexpected time. Not every time in the start (so it isn't useful to "lock" the browser. Someone may auto-login to a website ...
1
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1answer
33 views

ODD update possible hacking? [closed]

I installed the latest Ubuntu 32 bit version yesterday, then pulled up terminal and ran apt-get update this didnt work so I ran sudo apt-get install update eventually it worked but it downlanded ...
0
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1answer
28 views

Are there DNS leaks with the system proxy setting?

I'm using a system-wide proxy to browse the Internet. Are there any DNS leaks with that?
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0answers
69 views

tcpd[3674]: connect from unknown (unknown) - Am I being hacked?

Earlier today I had 7 tcpd processes on my server running at 100% cpu for a long period of time. Looking into syslog I found a lot of lines like this: tcpd[11447]: connect from unknown (unknown) ...
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1answer
50 views

Using 12.04 LTS network manager mixing up login and wifi passwords

I've been using 12.04LTS on my laptop for a while now, with automatic security patches etc. etc. I use wired ethernet at work, and wifi at home. Until recently both worked seamlessly and without any ...
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0answers
69 views

Ubuntu for the paranoid

Would it be possible to create an encrypted installation and use an SD card (or I can make a hardware key with a UART converter+microprocessor and keyboard. 1 key=1 password) as the decryption HW key ...
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1answer
26 views

Information and updates [closed]

I would like to know what are the first steps for a new user of ubuntu. What is most useful for an inexperienced user of Linux, mainly one that arrived from Windows. Is it important to use the ...
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2answers
69 views

What is MAC spoofing in the internet connections manager and does it have any benefit in terms of security? [closed]

What is MAC spoofing in the internet connections and does it have any benefit in terms of security? What is the purpose of cloning the mac or spoofing it? Does it help protect against hackers at ...
1
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0answers
37 views

New System account created automatically [closed]

This is weird. Last night, I started to download a movie from a torrent site, and I fell asleep. When I woke up, the download was finished and There is another user account created in my system named ...
0
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2answers
206 views

Will support for 14.10 stop this year? [duplicate]

A month back I have transitioned from Windows to Linux and I have utopic installed in my system. No complaints till now! :D What I wanted to know was as this is not an LTS release, will I face ...
0
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0answers
53 views

Using seahorse generated password files from command-line

Seahorse (aka Passwords and Keys) is a pretty cool application for general password management. It stores the keys in ~/.local/share/keyrings/. Is there some way for me to easily read/modify this ...
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2answers
70 views

Home folders accessible to other users and should not be, how to fix?

Why are my home folders accessible by other users on the same system by default? I understand that I can change the permission of the home folders but want to know why this happened? I have done ...
0
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2answers
113 views

ubuntu antivirus [duplicate]

Why I need to use anti virus like clam-av clam-tk or commodo anti virus or any free anti virus in Ubuntu ? Note: if I've root login enabled.and I am running few windows programs inwine1.6. will ...
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0answers
35 views

How force Logcheck to report fail2ban bans?

I'm using Logcheck to take care of my logfiles and suspicous activites. I also installed fail2ban and get sometimes... I would like to be informed then fail2ban blocks an ip.. but logcheck is not ...
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0answers
42 views

Can't access IRC on WiFi

I had been away from Ubuntu for quite a while, but now I fully migrated to it, and I'm quite happy with it. However, after a year or so, when I tried to login to Freenode, I saw that I can not connect ...
0
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1answer
22 views

So I used fixubuntu as a privicy measure, what other precations should I take using Ubuntu Linux?

Yes, I just want a privacy preserving OS, I know it's not 100% possible but I'd like to get as close as I can. Thanks
2
votes
1answer
76 views

How can I prevent people to see what application(s) I have opened?

I don't want people to see what applications I have opened. I would like to be able to instantly hide the windows with a shortcut key combination, so I can save my work afterwards. I also want to hide ...
0
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0answers
95 views

minimal data showing in auth.log

I have locked my server down and to help troubleshoot any holes, I look in the logs, especially auth.log. In the logs, it shows that there are attempts to log in but no data shows. I am not able to ...
0
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2answers
2k views

How to remove malware?

I use ubuntu 32 bit and chrome's infected with the softwareupdaterlp virus. I don't really know what steps I should take aside from resetting/re-installing chrome. Would really appreciate any tips on ...
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3answers
475 views

How can I have a Very secure Ubuntu Desktop system [closed]

How can I have a Very secure Ubuntu Desktop system and where is the best place online to learn about hardening Linux, not just Ubuntu?
1
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1answer
144 views

Are all PHP security upgrades backported to Ubuntu 12.04 until 2017

I recently came across an extension to a popular CMS that would not install on an Ubuntu 12.04 server, because PHP version 5.3 reached end of live. I was however under the impression that all security ...
0
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1answer
1k views

How to only install security updates [duplicate]

Is it possible to only install the security updates. If this is possible it needs to be done on several servers and ubuntu virtual machines (Manually in command line) . I already tried a few ...
2
votes
1answer
2k views

Ubuntu 12.04.5 LTS won't update libc6 to 2.15-0ubuntu10.10

In light of CVE-2015-0235, I set out to upgrade my Ubuntu Servers today. I have a 12.04.5 LTS server that refuses to update my libc6 package to the version that does not contain the vulnerability ...
3
votes
1answer
617 views

What is the 'libc gethostbyname buffer overflow' and how can I protect myself from it

Apparently there is a bug in the GNU C Library, that can cause a buffer overflow? What exactly is it, and how can i protect myself from it?! Reference: oss-security - Qualys Security Advisory ...
3
votes
1answer
2k views

CVE-2015-0235 How to update eglibc to 2.15-0ubuntu10.10

I followed these instructions and found that my glibc version was 2.15-0ubuntu10.9. How do I update it to 2.15-0ubuntu10.10? It is also mentioned here that services have to be restarted after the ...
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0answers
130 views

How can I disable all locking in 14.10?

I don't want the machine to prompt for password on resume from suspend, I don't want the machine to lock after a certain period of inactivity. At the moment, I only want it to lock a) when it boots ...
1
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2answers
85 views

SSD & Security & wipe Oh My

So SSD's are memory based, and therefore solid state, meaning that they have no mechanical parts like a a regular spinning hard drive. How does this affect the need to wash empty disk space and will ...
0
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4answers
63 views

can someone remotely access your ubuntu user account on your computer if they steal your ubuntu username and password

I would like to know if it is possible for someone who steals your ubuntu username and password to remotely access your ubuntu user account on your computer and even see what you are doing when you ...
2
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1answer
31 views

Is there a way to tell which application last accessed your camera?

Is there an application which will tell me which programs have last accessed my camera?
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1answer
51 views

How to password-protect an individual folder

I have to password-protect two folders: folder A is on my computer's hard drive, and folder B is on an external hard drive. Regarding folder A: I have tried encrypting folder A using Cryptkeeper but, ...