Questions tagged [selinux]
NSA Security-Enhanced Linux (SELinux) is an implementation of a flexible mandatory access control architecture in the Linux operating system.
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SELinux is preventing /usr/local/bin/python3.10 from append access on the file /data/logs/v100t1-grab.log
I am running RHEL 8. I am using podman to run containers with python apps. The apps need to rotate the logs. I am seeing this error on journalctl -xe:
SELinux is preventing /usr/local/bin/python3.10 ...
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How to adjust SELinux to allow not so large file downloads in Apache?
I have a centos 7 server running Apache 2.4 that will happily allow users to download files until they get to a certain size. I've noticed the problem with mp4 video files; I host both low and full ...
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SELinux denied issue - iptables_t plymouthd_t:unix_stream_socket connectto
We have Amazon Linux 2 with Selinux enabled on it
from audit.log file, we have the following denied:
type=AVC msg=audit(1645462240.556:179): avc: denied { connectto } for pid=7329 comm="...
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How to set SELINUX HTTPD User Content RW?
I'm quite new to SELINUX, I've simple question, I know there are httpd_sys_rw_content_t for /var/www/html, and read only httpd_user_content_t, but if I want to allow some folder to be RW for that ...
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Ubuntu 20.04 doesn't boot after setting SELinux enforcing
I'm trying to set SELinux to enforcing on Ubuntu 20.04, and the steps I did are as follow:
Install SELinux = sudo apt-get install policycoreutils selinux-utils selinux-basics -y
Activate SELinux = ...
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How to allow user to run only specific binaries
I'm adding user logviewer with /sbin/nologin/ and to my system.
My custom service is running eg. sudo -u logviewer less --follow-name /var/log/messages.
But still there are ways to run other command ...
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Unable to change SSH port on Almalinux/CentOS 8 with selinux present
I am trying to change the SSH port on a VPS using Almalinux. I followed this guide but have not been able to.
These are the output I receive when try to SSH using both 22 and the new port respectively....
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Centos7 Httpd cannot access mounted cifs directory
In a Centos 7 server I have a directory mounted with autofs in /mnt/cifs-shares/cone_files. I can read those files without issues.
The directory /mnt/cifs-shares/cone_files is owned by apache:apache ...
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SELinux preventing mongod search access
I noticed I am getting some SELinux errors when running mongod for the UniFi controller program. Namely, I am getting:
SELinux is preventing /usr/bin/mongod from search access on the directory /.
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SELinux: two servers, identical configurations, but different contexts
I've had my fair share of struggles with SELinux, but this is the first time that it's totally stumped me. I have two production CentOS 8 servers with functionally identical configurations hosting a ...
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SELinux on RHEL 7.5: sshd service process running in the kernel_t domain instead of sshd_t
I'd like the sshd service process to be running in the sshd_t domain so that ssh login will be allowd by SELinux.
How can I find out why it's running in the kernel_t domain and change it to sshd_t?
# ...
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block internet access to all applications except whitelisted
If blacklisting I'd use firejail, but since I want to whitelist and include preinstalled binaries, seems like SEL is the only potential choice. Essentially, could SEL be used to add a new type context ...
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How to set SELinux boolean using custom policy?
I know that SElinux booleans can be set via setsebool like this:
setsebool -P virt_qemu_ga_read_nonsecurity_files 1
But I want to set this boolean virt_qemu_ga_read_nonsecurity_files using custom ...
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Allow samba share to access mounted remote file store
I have two servers on the same network. One running Windows Server 2016 and another running CentOS 8. The Windows server is my main file store, it's where all my data is. The CentOS server has the ...
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Samba/Winbind domain member authentication issue
In setting up a new Linux Samba fileserver as a AD member I keep running into an issue with authentication.
It appears to be triggered by running with selinux in Enforcing mode after joining AD, but ...
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On Fedora, how do I configure selinux to allow a port for a new undefined service type?
I have several things that I'd like to be able to stand up as servers on Fedora. I know I can run at least some of these in podman or docker but I already know how to do that. I also already know how ...
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What is the SELinux type cloud_what_var_cache_t?
My server is running a clean installed CentOS 8.5 minimal. Installed PHP, MySQL and httpd from the official repositories, SELinux is enforcing (default).
The following error happens and I have no clue ...
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Which protections can I use on the server
I have read about server protection and I know how to work with fewalld protection because it is not demanding.
My question is:
Which of the following protections is best for the server and which of ...
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Why there are SELinux errors in permissive mode?
I have set CentOS 8 Stream with SELinux set to permissive but I still have bunch of red lines in the log e.g.:
SELinux is preventing /usr/lib/systemd/systemd from name_connect access on the tcp_socket ...
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VNC server won't start on AlmaLinux/CentOS 8
I could not get tigervnc to start on my AlmaLinux 8 machine. We have SELinux enabled and our home directories are automounted NFS shares (configured by IPA).
I see errors in my /var/log/audit/audit....
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Where do I get full list of SELinux access control types?
I cant find any explanation how do I list all access control types in SELinux.
E.g. httpd_log_t httpd_sys_content_t..
I would like to see them all
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CentOS8 Stream - what is security context in files permissions and how it can affect access?
I did install some of my aspnet core apps on Linux before using CentOS8. This time I used CentOS8-Stream. I dont know if that contributes to the issue.
The facts:
I could not make apache use ...
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failing to switch selinux to permissive mode with ansible TASK
I fail with an Ansible playbook installing postgresql on a centos7 target due to some permission problem which seems to be rooted in selinunx in some way.
As I have no experience with selinx ...
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SELINUX : How to make child folder rule precedence higher than parent rule
SELINUX : How to make child folder rule precedence higher than parent rule
eg :
/home/kevinw/www/kp/storage(/.*)? all files system_u:object_r:httpd_sys_rw_content_t:s0
lost ...
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How to set SELinux to allow CGI script to create a file
I'm writing a CGI for httpd on CentOS 7, which create and write files on a directory under home.
When I enable SELinux, it causes Internal Server Error. How can I setup SELinux?
The command sudo ...
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SELinux prevent connection clamd_port_t:tcp_socket
We have API Server (tomcat) which has clamAV configuration to scan any uploaded file to the system.
clamAV configuration will require the API server to connect to clamAV server.
SELinux is enabled on ...
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Tenable su+sudo and selinux
My Not-A-Sysadmin-Boss wants me to explain this but I can't really find an answer? When using TENABLE SC to scan a RHEL7 system the account used to do the scan connects via ssh then uses sudo to ...
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Apache, Multiple IPs and Selinux does not work in enforcing mode
I am trying to set up an Apache proxy to load balance and offload SSL. To this end I have multiple IPs on the same interface. Unfortunately it seems selinux prevents httpd from binding to the ...
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SELinux Issue - git status fatal: Out of memory? mmap failed: Permission denied
I have Centos 7.9 server running with Apache and Git, however if I do a
[root@a]# git status
fatal: Out of memory? mmap failed: Permission denied
But if Disable or Permissive the SE-Linux via below ...
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CGroup not mounted on Fedora 34
I have freshly provisioned Linode instance with Fedora 34. The only thing I have installed on it is libcgroup. cgconfig service is starting properly and there are no errors but the subsystem is not ...
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SELinux - blocks postfix emails sending out from the Web Application
My System environment, is Centos-7.9, Apache2.4, Php-fpm, PHP-7.4
I have postfix setup to send emails from the website, which is working in stand-alone test emails and when I turn the SELinux off.
...
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Permission denied for gitweb.cgi on CentOS
I've set up gitweb on my web server. I have created projects on the server. I can add commits to them and also clone them remotely.
The gitweb "homepage" does display and the static files ...
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selinux - why can't stuff_u with sysadm_r run postsuper?
I am trying to understand how selinux confined users really work, but there are a few behaviours that I still can not understand.
According to redhat
SELinux User Capabilities
stuff_u users should be ...
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Allow Wordpress upgrades with SELinux in EL8 with nginx/php-fpm
I'm trying to allow the use of Wordpress upgrades (not plugin updates) directly on the web interface.
I already have SELinux working for everything except this feature. When trying to nail down what ...
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Where is mapping of __default__ user to unconfined_u defined in SELinux policy?
semanage login -l shows following mappings
~]# semanage login -l
Login Name SELinux User MLS/MCS Range
__default__ unconfined_u s0-s0:c0.c1023
...
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Why are docker permission errors not logged by selinux?
If you try to bind mount a directory into a container under Red Hat you might have problems with selinux. The directory will be unreadable from inside the container. Unless you add a z/Z volume option....
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Unable to update to Wordpress 5.7.2: Could not copy file
I'm trying to update to the latest (5.7.2) version of Wordpress from a fresh installation on CentOS 7, however I keep getting the error message
Could not copy file.: wp-admin/images/about-color-...
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SetroubleshootPrivileged.py using 95% CPU | Centos 8 server
I have been battling with this issue for weeks.
I have a Linode with a Centos 8 server.
An application called "SetroubleshootPrivileged.py" is eating all the resources.
"setroubleshootd&...
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Unable to create selinux policy to allow drbdadm to run
In snmpd.conf I have
exec drbd_cstate /sbin/drbdadm cstate all
exec drbd_role /sbin/drbdadm role all
exec drbd_state /sbin/drbdadm dstate all
With selinux set to permissive if I were to run the SNMP ...
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CentOS Linux 8 freezes when changing SELinux Booleans (setsebool)
Problem
Various CentOS Linux 8 servers freeze/hang when changing SELinux Booleans.
Details and research
We manage hundreds of CentOS Linux servers. Lately we see deviant behavior on some (but not all) ...
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What makes a selinux-caused EACCESS to not be logged in audit
I've got a system with samba running with standard targetted policy for Fedora.
At some point samba is trying to access a directory tagged unconfined_u:object_r:unlabeled_t:s0 and fails. Through ...
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Unable to open PHP script files, even though I own them and have permissions
I'm using RHEL 8, and I have run into a crazy problem. My user account is unable to open PHP files.
If I have a file, owned by my user, and readable by my user, and I add <?php as the first line, ...
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Linux "ls -Z" shows question mark for security context
I've got some files that aren't being served on a site, and assuming it was a permissions issue I ran ls -Z but keep seeing ? in place of the security context:
-rw-rw-r-- pete pete ? ...
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How do I install `setroubleshoot-server` (sealert)
I am looking to use sealert on my Debian env.
I am unable to find the package to install to have it and the source code.
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SELinux setting httpd_can_network_relay to on throws error, "could not convert system_u:object_r:systemd_sleep_exec_t:s0 to sid". How is this fixed?
Environment: Digital Ocean Droplet, CentOS 8
The State of httpd_can_network_relay is set to on. However the Default is set to off.
$ sudo semanage boolean -l | grep httpd_can_network_relay
...
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Correct SELinux labels for a kvm/qemu user session VM shared folder
I am trying to set up a shared folder using the 9p protocol for a kvm/qemu VM that runs on the user session (so the qemu process runs as me, not as root). Mounting the shared folder in guest works ...
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Create selinux context for systemd script?
I'm trying to create a systemd service that executes a custom script I wrote. It is just a backup script that I am using with a systemd timer. When I try to execute something simple in the systemd ...
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SELinux : Where I find selinux policy for google-chrome on Fedora Linux?
How do I find all the SELinux policies used for Google Chrome on Fedora Linux?
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selinux audit rule not logging anything
I am trying to audit a directory tree for read, write, and permissions change. I created the rule using auditctl -w <path> -k media-watch, but ausearch -k media-watch only shows the creation (or ...
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What is Apache trying to do with port 80 that SELinux is blocking?
I have a small web server (CentOS 8) that runs a small php & mysql app. It also runs runs Nagios, BIND, and Postfix running as a secondary MX.
Everything seems to "work", and I've never ...
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