2013/8/12 Daniel J Walsh <dwalsh@xxxxxxxxxx>
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On 08/11/2013 02:28 PM, Alchemist wrote:
>
>
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> 2013/8/11 <linuxnutster@xxxxxxxxxxxx <mailto:linuxnutster@xxxxxxxxxxxx>>
>
> On 08/10/2013 11:55 AM, Alchemist wrote:
>
> ..2013/8/10 <linuxnutster@xxxxxxxxxxxx <mailto:linuxnutster@xxxxxxxxxxxx>
> <mailto:linuxnutster@__videotron.ca <mailto:linuxnutster@xxxxxxxxxxxx>>>
>
> I was just reading about this new malware threat. I'm not clear on how
> exactly this thing can get installed on a Linux system. Would it require
> 100% social engineering? I installed Fedora on my elderly mother's last two
> laptops so she can do her banking without being paranoid about keyloggers,
> trojans, etc... She is a news hound, so it's only a matter of time before
> she comes flying at me demanding reassurances. --
>
> Mini gude how Fedora can protect You:
>
> 1. Use only official repos/strict package signing, no untrusted package
> sources. 2. Update browser scope threats, Iced-Tea, Flash-plugin. (whole
> system, whuh!) 3. Better create two browser profiles, one for everyday
> usage with Iced-Tea disabled, other one ONLY for internet-banking with
> Iced-Tea enabled, and tell your mother about the value of such security
> solution. 4. Disable autorun
> http://blogs.iss.net/archive/__papers/ShmooCon2011-USB___Autorun_attacks_against_Linux.__pdf
>
>
<http://blogs.iss.net/archive/papers/ShmooCon2011-USB_Autorun_attacks_against_Linux.pdf>
> 5. Use SELinux shield: # setsebool -P allow_execstack=0 # setsebool -P
> allow_execheap=0 # setsebool -P allow_execmod=0 (may break some buggy
> apps) 6. Set umask 077 in ~/.bashrc (and if needed ~/.gnomerc) to locally
> or globally(/etc/profile,/etc/__bashrc) prevent new planted executables of
> being execuded. Of course if only system is not for multiuser, and there is
> no need for binary execution ~/ 7. HoT runs without root, so primary impact
> will be taking over control of user evironment. Protect important config
> files from modification, by setting chattr +i.(remove when needed) .bashrc
> .bash_profile .bash_logout .pam_environment .xinitrc .gnomerc
> .config/autostart/* and so on 8. Configure firewall, but this is different
> story, as I know from experience, this is difficult to fit any user
> browsing desires. But it's worth a try :)
>
>
> An excellent turorial, thanks! Does HOT rely completely on social
> engineering or can it penetrate easily via other means? Bearing in mind
> that we only use offical repos...
>
> Yes, as this is still the most effective way nowadays (for Windows,
> Android too), but as we understand social engineering as a wide range of
> techniques(see SET), you may be ready to tell your mother, not to enter
> root password, when PackageKit will ask for it- on malicious unsigned RPM
> received with Skype or by clickjacking for example. Or even give her
> limited sudo rigts if needed, and keep root password only to yourself.
> Don't forget about browser exploit packs, it is only a matter of time until
> they will put it browser exploits, but here properly configured SELinux
> comes into play. Stay safe.
>
>
>
>
>
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You could also setup a confined user to run user_u for example.
Sure, I forgot about user_u. Htw all those who are afraid or lazy, here is there is a nice SELinux into https://www.youtube.com/watch?v=MxjenQ31b70
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