git_script_selinux (8) - Linux Manuals

git_script_selinux: Security Enhanced Linux Policy for the git_script processes

NAME

git_script_selinux - Security Enhanced Linux Policy for the git_script processes

DESCRIPTION

Security-Enhanced Linux secures the git_script processes via flexible mandatory access control.

The git_script processes execute with the git_script_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep git_script_t

ENTRYPOINTS

The git_script_t SELinux type can be entered via the git_script_exec_t, shell_exec_t, git_script_exec_t file types.

The default entrypoint paths for the git_script_t domain are the following:

/var/www/cgi-bin/cgit, /var/www/git/gitweb.cgi, /var/www/gitweb-caching/gitweb.cgi, /bin/d?ash, /bin/zsh.*, /bin/ksh.*, /usr/bin/d?ash, /usr/bin/zsh.*, /usr/bin/ksh.*, /bin/esh, /bin/mksh, /bin/sash, /bin/tcsh, /bin/yash, /bin/bash, /bin/fish, /bin/bash2, /usr/bin/esh, /usr/bin/tcsh, /usr/bin/yash, /usr/bin/sash, /usr/bin/mksh, /usr/bin/fish, /usr/bin/bash, /sbin/nologin, /usr/sbin/sesh, /usr/bin/bash2, /usr/sbin/smrsh, /usr/bin/scponly, /usr/sbin/nologin, /usr/libexec/sesh, /usr/sbin/scponlyc, /usr/bin/git-shell, /usr/bin/cockpit-bridge, /usr/libexec/cockpit-agent, /usr/libexec/git-core/git-shell, /var/www/cgi-bin/cgit, /var/www/git/gitweb.cgi, /var/www/gitweb-caching/gitweb.cgi

PROCESS TYPES

SELinux defines process types (domains) for each process running on the system

You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux git_script policy is very flexible allowing users to setup their git_script processes in as secure a method as possible.

The following process types are defined for git_script:

git_script_t

Note: semanage permissive -a git_script_t can be used to make the process type git_script_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

BOOLEANS

SELinux policy is customizable based on least access required. git_script policy is extremely flexible and has several booleans that allow you to manipulate the policy and run git_script with the tightest access possible.

If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd server, you must turn on the authlogin_nsswitch_use_ldap boolean. Disabled by default.

setsebool -P authlogin_nsswitch_use_ldap 1

If you want to deny any process from ptracing or debugging any other processes, you must turn on the deny_ptrace boolean. Enabled by default.

setsebool -P deny_ptrace 1

If you want to allow all domains to use other domains file descriptors, you must turn on the domain_fd_use boolean. Enabled by default.

setsebool -P domain_fd_use 1

If you want to allow all domains to have the kernel load modules, you must turn on the domain_kernel_load_modules boolean. Disabled by default.

setsebool -P domain_kernel_load_modules 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

If you want to determine whether Git CGI can search home directories, you must turn on the git_cgi_enable_homedirs boolean. Disabled by default.

setsebool -P git_cgi_enable_homedirs 1

If you want to determine whether Git CGI can access cifs file systems, you must turn on the git_cgi_use_cifs boolean. Disabled by default.

setsebool -P git_cgi_use_cifs 1

If you want to determine whether Git CGI can access nfs file systems, you must turn on the git_cgi_use_nfs boolean. Disabled by default.

setsebool -P git_cgi_use_nfs 1

If you want to determine whether Git system daemon can search home directories, you must turn on the git_system_enable_homedirs boolean. Disabled by default.

setsebool -P git_system_enable_homedirs 1

If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. Disabled by default.

setsebool -P global_ssp 1

If you want to allow httpd cgi support, you must turn on the httpd_enable_cgi boolean. Disabled by default.

setsebool -P httpd_enable_cgi 1

If you want to allow confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. Enabled by default.

setsebool -P kerberos_enabled 1

If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Disabled by default.

setsebool -P nscd_use_shm 1

If you want to support NFS home directories, you must turn on the use_nfs_home_dirs boolean. Disabled by default.

setsebool -P use_nfs_home_dirs 1

If you want to support SAMBA home directories, you must turn on the use_samba_home_dirs boolean. Disabled by default.

setsebool -P use_samba_home_dirs 1

MANAGED FILES

The SELinux process type git_script_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions.

git_rw_content_t

        /var/cache/cgit(/.*)?

       /var/cache/gitweb-caching(/.*)?

git_script_tmp_t

FILE CONTEXTS

SELinux requires files to have an extended attribute to define the file type.

You can see the context of a file using the -Z option to lsP Policy governs the access confined processes have to these files. SELinux git_script policy is very flexible allowing users to setup their git_script processes in as secure a method as possible.

STANDARD FILE CONTEXT

SELinux defines the file context types for the git_script, if you wanted to store files with these types in a diffent paths, you need to execute the semanage command to sepecify alternate labeling and then use restorecon to put the labels on disk.

semanage fcontext -a -t git_script_tmp_t '/srv/mygit_script_content(/.*)?'
restorecon -R -v /srv/mygit_script_content

Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for git_script:

git_script_exec_t

- Set files with the git_script_exec_t type, if you want to transition an executable to the git_script_t domain.

Paths:

/var/www/cgi-bin/cgit, /var/www/git/gitweb.cgi, /var/www/gitweb-caching/gitweb.cgi

git_script_tmp_t

- Set files with the git_script_tmp_t type, if you want to store git script temporary files in the /tmp directories.

Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels.

COMMANDS

semanage fcontext can also be used to manipulate default file context mappings.

semanage permissive can also be used to manipulate whether or not a process type is permissive.

semanage module can also be used to enable/disable/install/remove policy modules.

semanage boolean can also be used to manipulate the booleans

system-config-selinux is a GUI tool available to customize SELinux policy settings.

AUTHOR

This manual page was auto-generated using sepolicy manpage.