SELinux (Security-Enhanced Linux) is an implementation of a flexible mandatory, role-based access control architecture on Linux. It is primarily used to confine system processes.
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SELinux Write access for vsftpd and samba
This should be easy enough I think, but I'm new to SELinux.
I have a CentOS 6 file server. I have some LVM file systems at /var/media and I want to use both Samba and FTP to share them with a Windows ...
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0answers
15 views
PID Grabbing Via LSM Hooks
I am grabbing the LSM hooks in my own created module and showing into the securityfs psuedo filesystem which is showing correctly.
The path where these hooks are showing is
...
1
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0answers
51 views
403 Forbidden on Sub-Folders
I am a Linux newbie and decided to do a LAMP install to start getting more familiar with it (as our company is moving more towards nix these days). Everything went great and PHPMyAdmin, MySQL, ...
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2answers
238 views
SELinux: Can I disable copying of certain files?
Please excuse me if this is too basic and you're tempted to throw an RTFM at me.
I want to prevent users from copying certain files while granting them read access to the same files. I thought this ...
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0answers
102 views
selinux, dovecot and sieve
I've just started learning to configure SELINUX and this morning on my CentOS 6.4 x64 system, with postfix/dovecot/mysql installed, I woke up to the following selinux issue
found 1 alerts in ...
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0answers
142 views
Why setsebool command of SELINUX taking so long and slow?
Hi I am new to the SELINUX and I have noticed the command setsebool take longer time than other linux commands. Such as:
setsebool -P ftp_home_dir ON
Out of curiosity I want to know why "setsebool" ...
1
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1answer
171 views
How do I install SELinux's sandbox utility on Linux Mint Debian Edition?
I'm following the Debian SELinux setup guide with my Linux Mint Debian Edition system. I installed the necessary packages:
sudo aptitude install selinux-basics selinux-policy-default selinux-utils ...
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1answer
65 views
Why setsebool for httpd not working with -P parameter?
I'm trying to disable SELinux for httpd, but when I use the the setsebool command with -P parameter, it doesn't work:
setsebool -P http_can_network_connect 1
Nothing happens when I do that ie, the ...
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1answer
122 views
GDM will not start on boot, unable to login into graphical interface
I am running RHEL 5.8 .
SELinux is enabled but in permissive mode. Here are some snippets from /var/log/messages on boot.
kernel: type=1400 audit(1360613500.551:6): avc: denied { write } for ...
5
votes
9answers
253 views
How to prevent a process from writing files
I want to run a command on Linux in a way that it cannot create or open any files to write. It should still be able to read files as normal (so an empty chroot is not an option), and still be able to ...
4
votes
1answer
420 views
Gnome terminal fails to start
After upgrading to Fedora 18, on certain occasions, gnome-terminal will fail to launch, requiring me to log out of the desktop and log in again. I tried tracing the error and found the following in ...
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0answers
90 views
How to set SELinux samba policy to enable dirs deletion/renaming?
I`m lost in trouble with SELinux once more link to my previous solved Q on Samba SELinux
When share's users try to delete a dir on share they fail with SELinux advertisement
to solve problem do ...
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0answers
164 views
How to get Wine to work with SELinux?
I want to run a .msi file on Fedora 17. After installing Wine Windows Program Loader on my Linux machine, it failed to run the file. A check on /var/log/messages shows the following line:
Jan 11 ...
3
votes
1answer
171 views
SELinux interfering with host/guest file sharing using KVM
I'm running Fedora 17 with KVM and the virtual machine runs okay. I tried to follow this to get access to a file on the host system but SELinux prevents the VM from accessing any files other than ...
1
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1answer
221 views
SELinux and samba
I have to set SELinux setenforce Permissive in order to give access to my samba share. I wonder if there is proper way to configure SELinux policy for fedora 17 as good admins do.
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1answer
71 views
To check which resource is being accessed by which process
I have some process running on my system. I need to list out which of the process at a moment has acquired/is using one or more of these in my system:
Ethernet
Camera
USB
Bluetooth
WiFi
File System
...
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votes
2answers
204 views
Warning: DocumentRoot does not exist
If I use this code where docroot is my new root for subdomain
$ ls -la --context /var/www/html
drwxr-xr-x root root system_u:object_r:httpd_sys_content_t .
$ chcon -R ...
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2answers
287 views
Disable SELinux in apache to stop warning
I keep getting this error when I restart httpd:
DocumentRoot does not exist
What else can I do besides disable editing /etc/sysconfig/selinux to fix it?
2
votes
1answer
166 views
SELinux - CentOSx86_64: User command limitation
SELinux - CentOSx86_64: User command limitation
Is SELinux the right tool for this job? If so, what is the best way to do it?
I would like to limit a particular user to only running some list of ...
2
votes
1answer
134 views
How to convert SELinux mypol.te file to semanage commands for a script
Have setup a special logging directory for MySQL logs. This required me to run the command
grep mysqld /var/log/audit/audit.log | audit2allow -M mypol
a number of times to authorize MySQL to ...
1
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1answer
71 views
How to generate SELinux policies based on logs?
Afaik there is a solution/software that can automatically generate SELinux policies based on logfiles. I just don't know the name of the software/method that can do this..
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1answer
406 views
How to configure SELinux using samba? Scientific Linux?
when I'm trying to mount a read-only samba share, then I get this messages on the samba server (and timeout on client side)
Nov 5 18:45:49 localhost kernel: type=1400 audit(1352137549.469:17): avc: ...
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1answer
726 views
httpd cant write to folder/file because of selinux
Does anyone know which sebool it is to allow httpd write access to /home/user/html?
When I disable selinux echo 0 > /selinux/enforce I can write, so definitely selinux. Just don't know which one is ...
1
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1answer
174 views
Scientific Linux 6.3 run evince in SELinux sandbox
I'm trying to run evince in the SELinux sandbox:
sandbox -X /usr/bin/evince Unixforpoets.pdf
but after waiting for minutes nothing happens, console doesn't outputs anything. So I collected the ...
1
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1answer
148 views
chcon fails to fix “cannot enable executable stack as shared object requires” err under RHEL6
I have an application I test at work, that has always failed installation on systems with SELinux enabled. Our published workaround involves issuing a chcon command for the library-file at the center ...
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0answers
264 views
Debian: unable to setup SELinux
I'm trying to setup SELinux on Debian 6 according to (the instructions reported on the Debian wiki).
I've run this commands:
apt-get install selinux-basics selinux-policy-default
selinux-activate
...
3
votes
1answer
285 views
allow webalizer in selinux (centos)
I roughly followed these instructions: http://library.linode.com/web-applications/analytics/webalizer/centos-5 to install and configure webalizer to run on several VirtualHosts. Unfortunately when i ...
3
votes
1answer
357 views
How do I edit a file and preserve its access control list / SELinux security context?
I'm on CentOS 6.2, and have a file with the alternate access method character displayed as a dot.
ls -l myfile
-rwxr-x---. 1 me mygroup 172 Aug 13 10:03 myfile
^
This dot.
...
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1answer
196 views
Why does it take so much time to execute semodule -i mypol.pp?
Command semodule -i mypol.pp takes more than one minute to execute. Why?
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votes
3answers
6k views
How to mount NFS 3 volumes on Fedora 17?
I installed the package nfs-utils and tried it via:
# mount -t nfs server:/mnt /mnt
mount.nfs: rpc.statd is not running but is required for remote locking.
mount.nfs: Either use '-o nolock' to keep ...
1
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0answers
68 views
Can selinux log an application owner name?
So I've set up selinux to log all file access operations in a certain directory. Here's some sample log output when doing an ls from sftp:
type=AVC msg=audit(1338465611.221:356): avc: granted { ...
3
votes
1answer
137 views
Why do SELinux policies require a system restart?
When changing SELinux policies, I've been reading that you're required to restart the system. What changes would require this? Are there certain policy changes that would not require a restart?
2
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0answers
286 views
How do I set up the SELinux sandbox in Debian?
I've installed SELinux in Debian sid in order to use the sandbox that locks down apps to a restricted enviroment, but I can't get it to work. If I try to use the sandbox command in permissive mode ...
2
votes
1answer
320 views
root can only login with bash restricted mode
I was implementing a series of recommendations to 'harden' my linux server, involving lots and lots of changes. Linux is CentOS 6.2, kernel 2.6.32-220.*.
I'm currently using tty2..tty5 (no X/GUI etc) ...
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3answers
748 views
How to configure SELinux to print date and time in each entry in audit log?
I'm using CentOS 5.5 and by default my /var/log/audit/audit.log looks like this:
type=USER_AUTH msg=audit(1331897657.359:8435): user pid=15610 uid=0 auid=4294967295 ...
2
votes
1answer
4k views
How to create Maildir directory with enough permissions for Postfix?
I have CentOS 5.5 with Postfix installed on it.
I want to use local delivery agent with default setting, but I want it to store mail with Maildir directory style mailboxes.
When I set the mailboxes ...
6
votes
1answer
339 views
What is the best way to learn SELinux?
I want to learn SELinux to a high level, being able to understand the intricacies of domains, types and switching.
What is the best way to go about this? I considered starting with Fedora and a good ...
1
vote
1answer
97 views
Why does SELinux allow me to read this file?
I appear to be misunderstanding the security levels/categories within SELinux. I have attempted to configure a file that I have read access to (via DAC), but no read access to via SELinux categories.
...
3
votes
1answer
297 views
SELinux outbound access to other sites with restrictions
We have CentOS 6 configured with SELinux to host a number of websites.
Unfortunately SELinux is preventing websites from accessing (outbound) sites, such as download.wordpress.com to update ...
2
votes
2answers
848 views
How to permamently disable SELinux?
We run a site with big traffic surges and, because of that, SELinux usually thinks that the traffic is a SYN flood attack. We have this same problem on many different CentOS servers.
Despite ...
6
votes
2answers
156 views
Make all SELinux contexts permanent
I've done a lot of chcon-ing lately,but if I understand it correctly, these will be erased on the next relabel. Is there any way to make the current contexts (preferably just under a certain ...
3
votes
2answers
162 views
Backup selinux system running strict
I have a cron job that is backing up a SELinux system running in strict mode. The problem is that SELinux wants to deny access to to the backup script since it wants access to every single file on the ...
11
votes
3answers
340 views
Prompt user on Linux security denial
Is it possible to make a Linux security module (eg. AppArmor, SELinux etc.) prompt the user, when an application wants to access classified files or folders (digital signatures, SSH keys, credit card ...
3
votes
1answer
3k views
chcon: can't apply partial context to unlabeled file while installing nagios with SELinux
I'm setting up Nagios core on CentOS with SELINUX=enforcing.
I try to run
chcon -R -t httpd_sys_content_t /usr/local/nagios/sbin/
as suggested in the manual, but I get this error messages:
chcon: ...
6
votes
1answer
124 views
deny any writing to given app and its children
So I have a Python app (which spawns other processes) which I want to deny any writing. It seems like a job for SELinux. Could you describe the steps needed to accomplish this, or perhaps direct me to ...
3
votes
2answers
3k views
SELinux stops Google Chrome from executing
I can no longer start Google Chrome on Fedora 14 (using GNOME).
strace
strace google-chrome
...
readlink("/proc/self/exe", "/opt/google/chrome/chrome"..., 4096) = 25
socketpair(PF_FILE, ...
4
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2answers
861 views
Selinux is denying access to mysqld
I have a script that dumps a mysql database. It then compresses the file and this gets stored in my home folder by using cron. The problem is I seem to be getting an error message.
mysqldump: ...
5
votes
2answers
655 views
What roles do DAC (file permissions), ACL and MAC (SELinux) play in Linux file security?
I need some clarification/confirmation/elaboration on the different roles DAC, ACL and MAC play in Linux file security.
After some research from the documentation, this is my understanding of the ...
6
votes
1answer
643 views
What is the proper way to set SELinux context in an RPM .spec?
I am trying to build an RPM that targets RHEL4 and 5. Right now I call chcon from %post but multiple Google entries say "that's not how you are supposed to do it" with very limited help on the right ...
3
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3answers
207 views
Output compiler options from SSH
How can I list the configuration options that ssh/sshd was compiled with?
I'm attempting to troubleshoot a SELinux configuration issue, and want to make sure that SSH was compiled with ...
