Ubuntu Security :: Is Windows 7 Any Less Vulnerable?
May 28, 2010
My laptop is beginning to show its age so it may be time for a new PC soon, and most likely it'll come with Windows 7 preloaded. I currently run a dual boot with Lucid and Windows XP, and although I hardly use XP anymore I would repeat this configuration on the new PC. So now I'm wondering if Windows 7 is any less vulnerable to viruses and malware than its earlier predecessors because I don't plan to renew any virus checking software that may come with it.
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Apr 7, 2009
I'm just curious as to what security measure's I should be taking to make my box a little less vulnerable? I'm still experimenting/playing with Linux, use the net, IM, download this and that and was wondering how secure fedora 10 was out of the box?
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Aug 28, 2010
In the wake of all of the stories about the Windows DLL hijacking bug, it appears that certain Linux distributions may be vulnerable to a similar problem related to the way that Linux handles a specific variable in some cases. The bug apparently was introduced via a Debian patch last year.The discussion on the possible bug in Linux began with a blog post by Tim Brown, a UK-based security researcher, who detailed a specific case in which Linux could be vulnerable to an attack similar to those designed to exploit the Windows DLL bug. The post spawned a related discussion on the Full-Disclosure mailing list, in which several others confirmed that they'd seen the problematic behavior in certain Linux distributions, including Fedora, Ubuntu and Debian.
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Dec 15, 2010
I used Avast webfilter (proxied webtraffic through Avast) when running Windows. Sometimes Avast would alert and "protect" me from being infected by a compromised website. NOTE: Avast would alert even absent clicking any links. Just viewing the page could result in infection. Should I be running some kind of proxy webfilter for protection? My understanding is that Firefox can be compromised and this can in turn compromise Ubuntu.Are these kinds of threats specific to Windows running Firefox, or Firefox per se. If Firefox per se it seems like I need some sort of Proxy webfiltering like Avast provides.
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Jul 13, 2010
I installed lampserver and took measures to see that apache would only serve 127.0.0.1 (Which appears to be a software switch as ipconfig says it's port is still "Open")
Mysql however, could be vulnerable: Do I need to secure it or does it only serve localhost? If so, how do I secure it?
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May 12, 2011
I've heard of attacks using PDF files on Windows with Adobe Acrobat and Foxit Reader. Is Linux vulnerable to these attacks when using the default PDF viewers in KDE or Gnome or even xpdf? What is a good PDF scanner to determine if a PDF file is evil?
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Dec 18, 2010
Is Linux vulnerable to Java drive-by exploits? Another computer I run on windows 7 just notified me that it was infected through Java, and I'm wondering if my Linux box (ubuntu 10) with Java installed is vulnerable.
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Nov 2, 2010
I have been reading about this new Firefox extension that can grab Twitter account information of computers connected to unprotected networks. Info: url
I occasionally have to connect to public, unprotected, WiFi networks and use Twitter via Gwibber. So, here is my question: is Gwibber vulnerable to Firesheep in an unprotected network? Is there a way of protecting it from this attacks? (I know that using https stops Firesheep attacks to the web version of Gwibber, but i don't think if this method is possible or applicable to Gwibber)
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May 10, 2011
CentOS using yum to update Exim. Exim is configured to not allow remote connections using the local_interfaces config option.My old version was 4.63-5.el5_5.2 and after using:
yum update exim
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May 26, 2011
I'd like to set up a fileserver for myself and a few trusted individuals. I'm computer savvy and I use various linux servers frequently for work, but this is my first time trying to setup my own. Is it possible to have a Samba server setup so it is both secure and facing the Internet? Two questions:
Will opening Samba ports make my default Ubuntu server particularly vulnerable to penetration? More than having an SSH server running? Does Samba/ can Samba be configured to encrypt traffic or is it sent plainly? If so, does Windows and Mac support this secure communication?
If not, what would you suggest? I'd like to achieve something like a network drive and at a difficulty level that my parents could use this if they really wanted to. I will be storing things like financial information and tax returns, but no weapons-grade secrets.
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Mar 19, 2010
I've got a samba share on a linux server, connecting to it with a windows 2k3 server via tools > map network drive. The goal is to be able to use windows to change the security of the samba share. The good news is it works! The bad news is it's not QUITE perfect:
The share is called /company. I started with the following to give everyone access to everything, set the owner of the share to administrator (my domain admin on the Windows domain), and set the group owner to domain users (group that everyone on the domain is part of):
Code:
chmod -R 777 /company
chown -R administrator /company
chgrp -R domain users /company
I then mapped the drive as a regular user, and of course, can access/modify/delete/rename/create anything I want. Then I picked a folder to lock down. Let's call it /company/myFolder. I did this on the Windows server by mapping the drive as administrator (the owner), right click > properties > security tab > advanced > highlight "domain users" and "everyone" and click edit > clear all (i.e. remove all access). Go back to Linux and
[Code]..
The only issue that remains is that I am able to rename/delete "myFolder" as a regular user. I thought this was coming from the "acl map full control = true" parameter in smb.conf, but I changed it to false and verified the change and it still happens. If I remove group and world write access to /company, I am no longer allowed to rename/delete myFolder, but then I can't create a new folder. If I add group write access back in I can create files but can also rename/delete folders within /company that have --- specified for group access. Any ideas what I need to tweak to make this right?
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May 20, 2011
Do to the last thread I posted got way off topic do to my bad doing , I will post it again to get the thread back on topic.I try it one last time hopefully these myths will be cleared up and this thread will stay on topic an not derail like last one.The myths going around on the internet.
1.Less than 1% use Linux and 10% use Mac Os X it is not that they are so much better but market share .The Malware makers are going windows where the market shares are.
2.Windows have more security but most people don't use it.
3.Mac OS X security is not that good , windows is better.
4.windows it has more gradual permission level than a ON and OFF like Linux or Mac OS X
5.Malware is growing with Linux and Mac OS X now.
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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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Sep 10, 2009
As Linux gains in popularity, (as I believe it will), do you think that Linux will ever become the target of as many virus and worm threats as Windows has faced? If so, do you think that the threats will have much success?
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Sep 24, 2010
My machine that is running Windows XP got a virus a few months ago. Keep in mind I have NEVER used Internet Explorer.
Symptoms when CONNECTED to the internet: My volume is turned down on start-up. When the volume is on the internet explorer "clicking" noise plays frequently. In task manager there are two "iexplore.exe" processes running. As soon as I kill them they will start up again. They aren't taking up copious amounts of memory, but they are still very present. If left on for long enough pop-ups will start appearing.
Symptoms when NOT CONNECTED to the internet: None.
What I've done: I've ran a handful of the free Anti-Virus programs, e.g., AVG, ComboFix, avast!, and Malwarebytes' Anti-Malware.
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Jan 6, 2011
Thought about posting in the Networking board, but I believe this is a much more security-oriented thread. So let's say I bring my computer to a public place, say a library with one open, public, shared wireless network. I connect to that network. Let's assume that everyone else who's connected is using Windows. Can they see my computer (through Network Manager or other software) and attack it (SYN flood or something)? Or does it depend on the network settings?
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Jul 18, 2011
I have a problem using PGP encryption. I am running Windows 7 operating system. I have PGP working perfectly fine when running manually through DOS mode (cmd.exe): gpg -ase --always-trust --batch --passphrase myphrase --output c: estdir estfile.csv.pgp -r someword c:estdir estfile.csv
Now the problem happens when I am trying to run same script in Perl in the browser (Perl + IIS are installed locally on my PC). The error I am getting is: gpg: no default secret key: No secret key gpg: C:\testdir\testfile.csv: sign+encrypt failed: No secret key
From what I understand, the secret key is created under my user profile. IIS runs under some default user name, so it does not see the secret key. I am not sure how to solve this problem.
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Aug 4, 2011
I am new to ubuntu natty narhwal 11.04 i want to ask as i have used only windows OSs where one must have to run anti virus for smooth computing. I am shifted to ubuntu now please tell me is there any need to use anti virus in ubuntu or not if yes then please guide me which anti virus and how should i install it on my ubuntu.
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Nov 8, 2010
Does "Portable Ubuntu" run separate from Windows? Point being, would I be vulnerable to Windows based trojans if I ran Firefox from Portable Ubuntu on Windows?
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Jan 9, 2010
If i download files from the internet to the ubuntu home download folder will that kill off windows viruses? Ive also have avast on demand scanner-but are anti-viruses effective against windows viruses these days?
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Jan 28, 2010
I have been trying to get my Samba 3.x NAS to connect to my Windows XP laptop. I can see the server though I cannot open it and see the shares. I have run various tests on the network and Samba (ping, smbclient) though still cannot find why I can't connect.
I can access the NAS via webmin, so I am thinking I need the security or the services settings on the XP machine. Is there a list somewhere of the Windows XP services and security settings required to share files?
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Feb 5, 2010
I have Ubuntu Karmic 64-bit dual boot with Windows 7. On Windows 7 i have microsoft security essentials for antivirus/antispyware. Recently I noticed GRUB boot failures after having booted to windows but couldn't see why. Just to be clear, I am using GRUB2. Anyway, the failure is as follows:
PC is powered on, goes on towards displaying GRUB menu but it only shows GRUB Loading and restarts, so the list doesn't show.and the restart keeps happening.Now the workaround so far is to boot using a live cd and fix GRUB according to the instructions posted here:
https:[url]....And after fixing GRUB2, i either have to boot into the desktop or recovery mode, to update GRUB2 menu once again using
Code:
update-grub
command and then everything works.
Now coming to what i think is the cause of the problem. Everytime MSE (microsoft security essentials) is updated be it standalone, or over internet, including failed updates, the boot failure happens.I've googled microsoft and ubuntu forums but couldn't find a fix.
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May 12, 2010
I'm dual booting 10.04 with windows 7 and it occurs to me that I could scan the windows partition for viruses FROM linux. Is anybody doing this sort of thing? Does that make any sense?
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Jun 6, 2010
Since Wine recognize the .exe filetype and associates itself with it, is it possible to get a virus that starts up automatically in wine or is it limited to me manually running the program?
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Aug 8, 2010
Is it possible to remotely access, inject, manipulate files and/or folders in the Windows NTFS partition when logged into Ubuntu?
I'm either logged into Windows or Ubuntu but NOT both -- ever. Therefore, while logged into Ubuntu, would it be possible for someone to crack into Windows via Ubuntu using Wi-Fi or modem?
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Sep 25, 2010
I wanted to know if I install Ubuntu on my virtual PC on Windows 7 is it just as secure?
If I have a keylogger or some spyware will that affect the session I have running on the Virtual PC? Can they still steal my passwords?
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Feb 28, 2011
I believe the name of the virus is "PC Defender 2010". This has self-installed, causing popups attempting to convince the user that there is a security flaw, and that they should upgrade to the advanced version. I have looked this up, and it is definitely a virus. The virus creates a shortcut with a target in the AppData folder named defender.exe. When I went to search for this file, after having set it to show hidden files and folder, I looked in the folder, and found nothing by the name of defender.exe. Does anyone have any ideas as to how to find this file, if it even exists, and then remove the virus all together from the computer. Ideally these solutions will be executable from Windows, as the user is rather afraid of linux.
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Apr 9, 2011
I'm dual booting with windows 7 and Ubuntu and i was wondering where i should download AVG (i have a paid version) and what other security precautions should I take between both operation systems?
i have:
1 windows partition (~23gbs)
1 Ubuntu partition (~23gbs)
1 linux swap partiton (~10 gbs)
1 NTSF partition for storage (~170gbs)
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May 30, 2011
My windows partition is infected and I recall that it is supposed to be possible from the linux partition with ClamAV. Now I'm running Fedora12 but this forum is much more active and I suppose that doesn't make a big difference. I tried to find something on google but most procedures seem to involve a Live CD but it would be more convenient for me to just do it from my linux distro running. Is there anything I have to be aware of or is it literally just scanning the windows partition with ClamAV?
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Jan 2, 2010
When you have a computer whose hard drive is partitioned with one part Windows and the other Linux, what are the concerns with viruses and transference across the two systems? Can viruses infect the windows side brought over through the Linux side (Firefox) or are the partitions completely separated? In other words, if all of your Internet voyages are through Firefox under Linux, is there any danger of infecting the Windows side of the computer? What about when having Linux installed within the Windows portion as a virtual system?
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