1samba_unconfined_scriSpEtL_isneulxinPuoxl(i8c)y samba_uncosnafmibnae_du_nsccornifpitned_script_selinux(8)
2
6 samba_unconfined_script_selinux - Security Enhanced Linux Policy for
7 the samba_unconfined_script processes
8
10 Security-Enhanced Linux secures the samba_unconfined_script processes
11 via flexible mandatory access control.
12 The samba_unconfined_script processes execute with the samba_uncon‐
14 fined_script_t SELinux type. You can check if you have these processes
15 running by executing the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep samba_unconfined_script_t
20
24 The samba_unconfined_script_t SELinux type can be entered via the
25 samba_unconfined_script_exec_t, shell_exec_t file types.
26 The default entrypoint paths for the samba_unconfined_script_t domain
28 are the following:
29 /var/lib/samba/scripts(/.*)?, /bin/d?ash, /bin/zsh.*, /bin/ksh.*,
31 /usr/bin/d?ash, /usr/bin/ksh.*, /usr/bin/zsh.*, /bin/esh, /bin/mksh,
32 /bin/sash, /bin/tcsh, /bin/yash, /bin/bash, /bin/fish, /bin/bash2,
33 /usr/bin/esh, /usr/bin/sash, /usr/bin/tcsh, /usr/bin/yash,
34 /usr/bin/mksh, /usr/bin/fish, /usr/bin/bash, /sbin/nologin,
35 /usr/sbin/sesh, /usr/bin/bash2, /usr/sbin/smrsh, /usr/bin/scponly,
36 /usr/sbin/nologin, /usr/libexec/sesh, /usr/sbin/scponlyc, /usr/bin/git-
37 shell, /usr/libexec/sudo/sesh, /usr/bin/cockpit-bridge,
38 /usr/libexec/cockpit-agent, /usr/libexec/git-core/git-shell
39
41 SELinux defines process types (domains) for each process running on the
42 system
43 You can see the context of a process using the -Z option to ps
45 Policy governs the access confined processes have to files. SELinux
47 samba_unconfined_script policy is very flexible allowing users to setup
48 their samba_unconfined_script processes in as secure a method as possi‐
49 ble.
50 The following process types are defined for samba_unconfined_script:
52 samba_unconfined_script_t
54 Note: semanage permissive -a samba_unconfined_script_t can be used to
56 make the process type samba_unconfined_script_t permissive. SELinux
57 does not deny access to permissive process types, but the AVC (SELinux
58 denials) messages are still generated.
59
62 SELinux policy is customizable based on least access required.
63 samba_unconfined_script policy is extremely flexible and has several
64 booleans that allow you to manipulate the policy and run samba_uncon‐
65 fined_script with the tightest access possible.
66 If you want to deny user domains applications to map a memory region as
70 both executable and writable, this is dangerous and the executable
71 should be reported in bugzilla, you must turn on the deny_execmem bool‐
72 ean. Enabled by default.
73 setsebool -P deny_execmem 1
75 If you want to deny any process from ptracing or debugging any other
79 processes, you must turn on the deny_ptrace boolean. Enabled by
80 default.
81 setsebool -P deny_ptrace 1
83 If you want to allow any process to mmap any file on system with
87 attribute file_type, you must turn on the domain_can_mmap_files bool‐
88 ean. Enabled by default.
89 setsebool -P domain_can_mmap_files 1
91 If you want to allow all domains write to kmsg_device, while kernel is
95 executed with systemd.log_target=kmsg parameter, you must turn on the
96 domain_can_write_kmsg boolean. Disabled by default.
97 setsebool -P domain_can_write_kmsg 1
99 If you want to allow all domains to use other domains file descriptors,
103 you must turn on the domain_fd_use boolean. Enabled by default.
104 setsebool -P domain_fd_use 1
106 If you want to allow all domains to have the kernel load modules, you
110 must turn on the domain_kernel_load_modules boolean. Disabled by
111 default.
112 setsebool -P domain_kernel_load_modules 1
114 If you want to allow all domains to execute in fips_mode, you must turn
118 on the fips_mode boolean. Enabled by default.
119 setsebool -P fips_mode 1
121 If you want to enable reading of urandom for all domains, you must turn
125 on the global_ssp boolean. Disabled by default.
126 setsebool -P global_ssp 1
128 If you want to control the ability to mmap a low area of the address
132 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
133 the mmap_low_allowed boolean. Disabled by default.
134 setsebool -P mmap_low_allowed 1
136 If you want to allow samba to run unconfined scripts, you must turn on
140 the samba_run_unconfined boolean. Disabled by default.
141 setsebool -P samba_run_unconfined 1
143 If you want to disable kernel module loading, you must turn on the
147 secure_mode_insmod boolean. Enabled by default.
148 setsebool -P secure_mode_insmod 1
150 If you want to boolean to determine whether the system permits loading
154 policy, setting enforcing mode, and changing boolean values. Set this
155 to true and you have to reboot to set it back, you must turn on the
156 secure_mode_policyload boolean. Enabled by default.
157 setsebool -P secure_mode_policyload 1
159 If you want to allow unconfined executables to make their heap memory
163 executable. Doing this is a really bad idea. Probably indicates a
164 badly coded executable, but could indicate an attack. This executable
165 should be reported in bugzilla, you must turn on the selin‐
166 uxuser_execheap boolean. Disabled by default.
167 setsebool -P selinuxuser_execheap 1
169 If you want to allow all unconfined executables to use libraries
173 requiring text relocation that are not labeled textrel_shlib_t, you
174 must turn on the selinuxuser_execmod boolean. Enabled by default.
175 setsebool -P selinuxuser_execmod 1
177 If you want to allow unconfined executables to make their stack exe‐
181 cutable. This should never, ever be necessary. Probably indicates a
182 badly coded executable, but could indicate an attack. This executable
183 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
184 stack boolean. Enabled by default.
185 setsebool -P selinuxuser_execstack 1
187 If you want to support X userspace object manager, you must turn on the
191 xserver_object_manager boolean. Enabled by default.
192 setsebool -P xserver_object_manager 1
194
198 The SELinux process type samba_unconfined_script_t can manage files
199 labeled with the following file types. The paths listed are the
200 default paths for these file types. Note the processes UID still need
201 to have DAC permissions.
202 file_type
204 all files on the system
206
209 SELinux requires files to have an extended attribute to define the file
210 type.
211 You can see the context of a file using the -Z option to ls
213 Policy governs the access confined processes have to these files.
215 SELinux samba_unconfined_script policy is very flexible allowing users
216 to setup their samba_unconfined_script processes in as secure a method
217 as possible.
218 The following file types are defined for samba_unconfined_script:
220 samba_unconfined_script_exec_t
224 - Set files with the samba_unconfined_script_exec_t type, if you want
226 to transition an executable to the samba_unconfined_script_t domain.
227 Note: File context can be temporarily modified with the chcon command.
231 If you want to permanently change the file context you need to use the
232 semanage fcontext command. This will modify the SELinux labeling data‐
233 base. You will need to use restorecon to apply the labels.
234
237 semanage fcontext can also be used to manipulate default file context
238 mappings.
239 semanage permissive can also be used to manipulate whether or not a
241 process type is permissive.
242 semanage module can also be used to enable/disable/install/remove pol‐
244 icy modules.
245 semanage boolean can also be used to manipulate the booleans
247 system-config-selinux is a GUI tool available to customize SELinux pol‐
250 icy settings.
251
254 This manual page was auto-generated using sepolicy manpage .
255
258 selinux(8), samba_unconfined_script(8), semanage(8), restorecon(8),
259 chcon(1), sepolicy(8) , setsebool(8)
260samba_unconfined_script 19-04-25 samba_unconfined_script_selinux(8)