Fedora Security :: SELinux Policy Changing In 15
Jul 24, 2011
I need to change SELinux policy to permissive and then back to enforced for an installation. I understand that I should be able to do that through the SELinux Administration window accessed through System -> Administration ->SELinux Management. But I do not have any real sysadmin tools available in my Fedora 15 Gnome Gui interface. Am I missing something, or should I use some sort of similar command line tool to do this?
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May 25, 2011
Tried google and searching this forum to no avail. Under Fedora 14, there is an selinux policy which blocks sshd from making outbound connections on port 80 or 443. This can occur when a client box tries to tunnel through the ssh connection for encrypted access to the web.
While I did manage to allow this happen by creating a permissive domain for sshd with this command:
Code:
The preferred way would be to allow sshd to make connection on other ports with a similar command that does not seem to work:
Code:
Is this the correct way of allowing an outbound port connection for the sshd daemon?
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Nov 20, 2009
I just upgraded from 11 to 12 and then installed the Nvidia proprietary drivers from RPMFusion. Initially glxinfo wouldn't work because SELinux was stopping it from using an executable stack. Since the Nvidia drivers are proprietary and a fix may not be provided, I allowed this access to glxinfo with chcon -t execmem_exec_t '/usr/bin/glxinfo'
However it looks like every program using glx-utils also needs these permissions - so far I allowed Xorg, compiz and the Firefox video plugin to execstack. Can anyone suggest a fix for this - preferably one that avoids execstack for all those apps since its a security risk. If not how do I create an SELinux policy to automatically grant apps execstack while they use glxinfo or other nVidia libraries but not at other times.
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Mar 27, 2011
I couldn't able to change file permission of files residing under /media/* Under /media all the NTFS partitions are mounted manually (gnome GUI) using root password. File properties of file under those NTFS partition shows SELinux context is "fusefs_t". I guess this is prevention from changing permission of file. How can I over come this?
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Feb 20, 2010
I just updated my system via yum and got an odd output after selinux-policy-targeted package finished updating.
Code:
Updating : selinux-policy-3.6.32-89.fc12.noarch 14/80
Updating : selinux-policy-targeted-3.6.32-89.fc12.noarch 15/80
/etc/mock/koji* /etc/rc.d/init.d/dirsrv* /srv/git* /usr/autodesk/maya2010-x64/lib /usr/lib{64,}/nagios/plugins/check_mailq /usr/sbin/ns-slapd /usr/share/e16/misc* /usr/share/shorewall/compiler.pl /var/cache/cgit* /var/lib/git* /var/lib/koji* /var/www/git/gitweb.cgi /var/www/git/gitweb.cgi
Does anyone knows what that means?
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Jun 17, 2010
I am trying to configure my live install of fedora so a PC on the same intranet can access it by hostname instead of by IP address.After I installed bind, I realized the man pages recommended against bind and said instead to enable SELinux named. I tried to guess what variables to set after googling and studying the documentation and coming up empty. I used getsebool -a, and tried turning one and all on.I test using:nslookup myhostname on the linux box, since if that is working it isnt surprising that the windows box cant see it. what buttons to push to enable SELinux named, as described in fedora 13 man page for bin slight correction, the man page is for named. It says to remove the bind-chroot and use SElinux to enable named. I think I also have to create a new zone. This seems akin to proving fermats last theorem but less rewarding. anyone know what keys to push for either. I did get system-config-selinux running. I thought it was in an infinite loop but it does *eventually* load a gui. Also if you set a boolean it will grab all CPU for a couple of minutes. (used top in another terminal).
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Feb 1, 2010
I have in /etc/selinux/config:
Code:
SELINUX=enforcing
SELINUXTYPE=mls
Do I have MLS enabled? I can't use Selinux commands. I thought MLS is sort of package to Selinux. I fallowed this:
Code:
[code].....
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Jan 5, 2010
FC12 with recent updates The bugzilla I reported is fixed in selinux 3.6.32-66 and I have 3.6.32-56. I refreshed the repositories and looked for 66 and it is not listed. Question - how often does the policy changes get posted to the repositories ? And are the repositories the normal place to get the latest and greatest ?
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Apr 13, 2011
this is the allert i got:Code:Summary:Your system may be seriously compromised! /usr/sbin/NetworkManager tried to loada kernel module.Detailed Description:SELinux has prevented NetworkManager from loading a kernel module. All confinedprograms that need to load kernel modules should have already had policy writtenfor them. If a compromised application tries to modify the kernel this AVC willbe generated. This is a serious issue.Your system may very well be compromised.Allowing Access:Contact your security administrator and report this issue.Additional Information:
Source Context system_u:system_r:NetworkManager_t:s0
Target Context system_u:system_r:NetworkManager_t:s0
Target Objects None [ capability ]
[code]....
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Feb 15, 2010
I was setting up a Samba server and I ran into some problems with SELinux related to the context of the home directories. I made a user account, say "UserAccount", with a default home directory "home/UserAccount". Afterwards I realized that I needed to move the home directory of this particular user to another location, say "/home2/UserAccount". So I created the new directory, changed the permissions, and used Gnome's system-config-user to change the user's home directory.
I then set-up the Samba server, activated samba_run_unconfined and samba_enable_home_dirs in SELinux, and made an account for UserAccount. When testing the Samba account for UserAccount SELinux denied read access. I checked the context and the new home directory did not appeared to have been updated. I had to manually run:
restorecon -R -v /home2/UserAccount
to set the context on the new home directory. I'm not very familiar with SELinux, so my question is this: is this normal security policy or is a bug in the system-config-user tool? If it's normal policy can someone explain why? I'm always ready to learn Distro: Fedora 12 (kernel: 2.6.31.5-127.fc12.i686) System: Dual Intel Xeon @ 3.2 GHz, 1 GB RAM
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Jun 14, 2010
i am trying to install centos 5.5 x86_64 as a guest OS in vmware server 2.0.2 using netinstall iso. Installation runs fine until the point, when it tries to install selinux-policy-targeted-2.4.6-279.el5.noarch, the whole virtual pc hangs at this.any ideas? i tried to google few things about this, but i have found nothing. this has happened 3 times in row, whole virtual pc always hangs at the same package. i dont have any other problems with vmware, gentoo runs and installs fine in it.i would prefer to do installation using netinstall.iso, it would take a lot of time to download all cds or whole dvd and all i require is a very basic set of packages.
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Oct 20, 2010
I'm attempting to get MapServer running on my Fedora 13 computer. I was able to install with the package manager, and the executable (mapserv) was originally placed in /usr/sbin. But I need it in /var/www/cgi-bin to work on the webserver. So I copied the file to the right location. Unfortunately, it doesn't have the correct SELinux context. Here's the message from the troubleshooter:
SELinux denied access requested by /var/www/cgi-bin/mapserv. /var/www/cgi-bin/mapserv is mislabeled. /var/www/cgi-bin/mapserv default type is httpd_sys_script_exec_t, but its current type is httpd_sys_script_exec_t. Changing this file back to the default type, may fix your problem.
How's that for circular logic? Does anyone have an idea what the correct SELinux context for a cgi-bin executable might be?
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Nov 10, 2010
Trying to keep selinux enabled. When I start SeLinux Troubleshooter from the menu, which is inautostart as well, It tells me SELinux not enabled, sealert will not run on nonSELinus systems".How do I get SELinux permanently started then
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Jan 17, 2011
My newly installed Fedora-14 (64-bit) has SELinux disabled. I can't find any way to enable it. I tried to set it manually in /etc/selinux/config to enforcing or permissive but nothing happens after reboot. In GUI configuration tool it is set to disabled and grayed out so that there is no way to enable it there. Is there another way to enable SELinux?
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Apr 30, 2011
I tried to log in to my xguest account and it asked for a password, which it shouldn't, so there's a problem with SELinux.When I type getenforce it says it is disabled, yet when I go to /etc/selinux and look at the config, it is in enforcing mode and not commented out, type is strict.When I go to the SELinux management GUI I can't change the current enforcing mode and it's set to disabled and default to enforcing.
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Mar 22, 2011
Quote:One of the new features in Firefox 4 that we are very excited about is Content Security Policy, which is a mechanism that works behind the scenes to prevent some of the more severe web-based attacks against users and websites.Firefox users don?t have to do anything in order to gain this protection. Simply install Firefox 4 and you will instantly receive all of the benefits that Content Security Policy has to offer. Easy!
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May 11, 2009
I am new to Fedora 10, and to SELinux too.
I would like to know how can I prevent from users with role user_r to connect to Internet with firefox.
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Jul 8, 2009
I am running Fedora 11 and every time i plug in my iPod it tells me... SELinux is preventing mkdir (podsleuth_t) "read" security_t ... I have no idea on how to create a policy module to allow access.
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Mar 29, 2010
I get a SELinux relabel often even without changing stuff. SELinux troubleshoot doesn't show any error nor are there any messages in /log/messages that give any clue. Where should I look to see whats happening ?
2.6.31.12-174.2.22.fc12.x86_64
selinux-policy-3.6.32-103.fc12
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Jul 11, 2010
I wonder if SELinux really are necessary for a home desktop ?
It only makes my computer use more problematic than it already is.
What can happend if I uninstall it on my Fedora 13 dist ?
Is the hole Internet going to come in to my computer and destroy it ?
If I uninstall SELinux, is the firewall uninstalled also ?
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Jul 19, 2010
I have recently upgraded from FC12 to FC13, and last week I updated all packages using YUM. The system is running as a VM inside CentOS 5.5 using KVM. SELinux is enforcing, using the targeted policy. Bugzilla is version 3.6.1 and was NOT installed using RPM or YUM.
Bugzilla was working OK on this machine until SELinux was upgraded last week from 3.7.19-28 to 3.7.19-33, and is still broken after testing 3.7.19-37 from the testing repo. With SELinux in enforcing mode, apache returns error 500 when I browse to the main bugzilla page. The apache error log shows this:-
Code:
[Mon Jul 19 13:15:08 2010] [error] [client 192.168.40.1] (13)Permission denied: exec of '/var/www/html/bugzilla/index.cgi' failed
Nothing, and I mean absolutely nothing, is recorded in /var/log/audit/audit.log, /var/log/messages or /var/log/secure.
[Code]....
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Mar 17, 2011
i get this warning from selinux :
"SELinux is preventing /bin/mailx from append access on the file /var/lib/rkhunter/rkhcronlog.OmRFCZOynG."
I tried to fix it by "# /sbin/restorecon -v /var/lib/rkhunter/rkhcronlog.OmRFCZOynG" as suggested by SELinux but it comes back with another warning, but with a different /rkhcronlog.xxxxxxxxx...
i think its just a way of rkhunter logging issue -. attached here is the actual error message by selinux.
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Jul 20, 2011
I just install Fedora 15 and I see the SELinux Policy Genertation Tool and the SELinux Administration application in the app launcher but I do not see the SELinux Troubleshooter app. I seems to be missing. How do I get it on my system?
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Mar 6, 2009
I know very little about SE Linux and I've heard that in some situations it's better to disable it. For a home user, is it important? Does it improve your life ? or does it get in the way ?
Last week some update stopped my printing and I had to install the new hplip from HP because it wasn't in the Fedora repos to correct the problem. I don't know if SELinux had anything to do with it, but today when I disabled SELinux a few minutes later I get a star up on the toolbar and when I clicked on it it mentioned something about hplip. It wouldn't make any sense to me but maybe this has happened to others.
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Mar 15, 2009
SElinux is blocking my internet connection and every time when I connect t the internet (pppoe connection) I ge message.
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Jun 4, 2009
Currently working on the targeted policy, I need a help in doing the following things as quick as possible:
1- How to create a totally new SELinux user (not mapping new linux user to SELinux user) I want a new user with no roles or with a maximum of 1 role. I also need how to compile the new user so I can used it for mapping users. At the time, I've tried creating a new file inside /etc/selinux/targeted/contexts/users similar to the other users inside this directory, but it did not actually seem to appear when using the command semanage to list SELinux users : semanage user -l
2- How to create a totally new SELinux role (empty for now) ? and how to make the relation between this new role and domains or types.
3- How to create new domain, actually following some old instructions I created the .fc and .te files, but not the .if file, which is more complicated than the other 2 file.
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Jul 12, 2009
I've got a question about chattr command. is it possible to restrict a root access for this command. what i want is something similar to freebsd behaviour aka the kernel secure level. setting a particular security level results in limiting some operations (i.e changing immutable flags on files) by root. well, if someone gained an access to a machine in some way, nothing would stop him changing the file's flags. so the question is if it can be achieved with selinux?
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Aug 6, 2009
well after spending most of the morning getting help with my internet connection hanging when I dial up we discover that SELinux is causing it so when I set it to passive I can connect so how can I get it to allow me to connect while being set to enforcing?
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Aug 17, 2009
I plan to install vmware but I had some problems...So I looked over the internet and I found that I must disable selinux....is this true? It means that I must have to disable the selinux for ever? And then, will my System be safe?
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Jun 22, 2010
I want to be able to created directories and upload files (images mostly) via a php web page. The directory structure is a throwback to windows and I really really don't want to have to change it because there are so many files/links already there.
/cust/cust_name/site/version/web (all html/php files go here)
I want to be able to edit the files with a 3rd party tool (SSH based). These are small orgs, like my church, local community club, sports team, etc., so file ownership needs to sync with the editor, not apache.
[Code].....
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