Fedora Security :: Get A Server Up And Running With SELinux Fully Enabled?
Mar 19, 2009
I decided that I'd torture myself and try to get a server up and running with SELinux fully enabled. I so far have figured out virtual hosting, vsftpd, and SSH to work with it nicely, but I can't figure out what to do to get AWstats to be viewable through a browser with SELinux enabled. This is what I get from /var/log/messages:
Code:
Mar 19 15:09:34 localhost kernel: type=1400 audit(1237496974.987:69): avc: denied { getattr } for pid=4769 comm="httpd" path="/usr/share/awstats/wwwroot/cgi-bin/awstats.pl" dev=sda1 ino=1267968 scontext=unconfined_u:system_r:httpd_t:s0 tcontext=system_u:object_r:httpd_awstats_script_exec_t:s0 tclass=file
Mar 19 15:09:34 localhost kernel: type=1400 audit(1237496974.987:70): avc: denied { getattr } for pid=4769 comm="httpd" path="/usr/share/awstats/wwwroot/cgi-bin/awstats.pl" dev=sda1 ino=1267968 scontext=unconfined_u:system_r:httpd_t:s0 tcontext=system_u:object_r:httpd_awstats_script_exec_t:s0 tclass=file
Could someone explain to me what I should be looking for in these messages? Or what I would need to do to fix it?
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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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Oct 18, 2010
I have installed CentOS and Redhat5 on a LVM partition and selinux is enabled. Both OS's share the same /home partition with one user with the same login(gc) and same uid (1000). The problem I am having is that gc can login with all permissions etc on the OS that was installed first (CentOS). For the redhat OS gc can login but cannot write to the home directory (or startx since X needs to write to Xauthority)Here are outputs - 1st CentOS
[gc@shuttle ~]$ ll -Zd $HOME
drwx------ gc gc system_ubject_r:unlabeled_t /home/gc
[gc@shuttle ~]$ stat $HOME
[code]....
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Dec 8, 2010
I installed Nvidia drivers n my Fedora 14 and was working just fine!I also have disabled Nouveau to make it work.But after i changed the selinux to permissive my X no longer loads!
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Sep 3, 2010
IS SELinux fully supported by debian
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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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Jan 28, 2010
Whenever i restart postgres in my server, Selinux is not letting it log anything. In /var/log/messages, it says.
Quote: Jan 28 14:15:43 dataserver kernel: audit(1264709743.263:38): avc: denied { append } for pid=5986 comm="postmaster" name="pgsql.log" dev=sda8 ino=3932166 scontext=root:system_r: postgresql_t tcontext=root: object_r:var_log_t tclass=file
Jan 28 14:15:43 dataserver kernel: audit(1264709743.263:39): avc: denied { append } for pid=5986 comm="postmaster" name="pgsql.log" dev=sda8 ino=3932166 scontext=root:system_r: postgresql_t tcontext=root: object_r:var_log_t tclass=file
I cannot disable SeLinux in this server.
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Jul 27, 2011
I configured DNS in my server while That time SELINUX enabled means It show permission denied error and some errors, but i checked all the directory permissions and all its every thing correct only but not worked..At last I just disabled the SELINUX then its working fine.I Heard SELINUX is for security for Linux operating systems, but why i disabled means only its working??
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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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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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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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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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Feb 18, 2010
i have dual OS in my hard disk. win xp and rhel5. i used use ntfs partition too while working in linux. There is no problem until i enable selinux. When i enabled that, its giving some error at startup and left the partition unmounted. But manually i can mount after logged in. But i need it at the startup itself. How to solve this.i am installed dkms* dkms-fuse* fuse* and fuse-ntfs-3g* rpms to use the ntfs partitions.
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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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Jul 30, 2010
I sue Fedora 13. Since a few times ago, every time when I start the computer, it appears a message of SELinux trouble shooter about a security alert. But most of times there are no errors to show.
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Nov 11, 2010
I have a removable USB drive formated with NTFS. I enabled all the samba boolians in the SElinux GUI but it still doesn't seem to work. If i put it on permissive it will work. What more is there that i need to do to get my directories to show up on samba with selinux enabled?
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Nov 21, 2010
I'm suspicious that the context of /etc/sudoers is wrong. During the last upgrade to Fedora 14, RPM dropped /etc/sudoers.rpmnew, which had a different context than the real sudoers file. But, when I try to get SELinux to relabel the file (using restorecon or fixfiles), it refuses to make a change.
> ls -lZ /etc/sudoers
-r--r-----. root root unconfined_u:object_r:etc_t:s0 /etc/sudoers
> matchpathcon /etc/sudoers
[code]....
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