1unconfined_sendmail_selSiEnLuixn(u8x)Policy unconfined_suenncdomnafiilned_sendmail_selinux(8)
2
6 unconfined_sendmail_selinux - Security Enhanced Linux Policy for the
7 unconfined_sendmail processes
8
10 Security-Enhanced Linux secures the unconfined_sendmail processes via
11 flexible mandatory access control.
12 The unconfined_sendmail processes execute with the unconfined_send‐
14 mail_t SELinux type. You can check if you have these processes running
15 by executing the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep unconfined_sendmail_t
20
24 The unconfined_sendmail_t SELinux type can be entered via the send‐
25 mail_exec_t file type.
26 The default entrypoint paths for the unconfined_sendmail_t domain are
28 the following:
29 /usr/sbin/sendmail(.sendmail)?, /usr/bin/esmtp, /usr/sbin/rmail,
31 /usr/sbin/ssmtp, /usr/lib/sendmail, /var/qmail/bin/sendmail,
32 /usr/sbin/sendmail.postfix
33
35 SELinux defines process types (domains) for each process running on the
36 system
37 You can see the context of a process using the -Z option to ps
39 Policy governs the access confined processes have to files. SELinux
41 unconfined_sendmail policy is very flexible allowing users to setup
42 their unconfined_sendmail processes in as secure a method as possible.
43 The following process types are defined for unconfined_sendmail:
45 unconfined_sendmail_t
47 Note: semanage permissive -a unconfined_sendmail_t can be used to make
49 the process type unconfined_sendmail_t permissive. SELinux does not
50 deny access to permissive process types, but the AVC (SELinux denials)
51 messages are still generated.
52
55 SELinux policy is customizable based on least access required. uncon‐
56 fined_sendmail policy is extremely flexible and has several booleans
57 that allow you to manipulate the policy and run unconfined_sendmail
58 with the tightest access possible.
59 If you want to deny user domains applications to map a memory region as
63 both executable and writable, this is dangerous and the executable
64 should be reported in bugzilla, you must turn on the deny_execmem bool‐
65 ean. Enabled by default.
66 setsebool -P deny_execmem 1
68 If you want to deny any process from ptracing or debugging any other
72 processes, you must turn on the deny_ptrace boolean. Enabled by
73 default.
74 setsebool -P deny_ptrace 1
76 If you want to allow any process to mmap any file on system with
80 attribute file_type, you must turn on the domain_can_mmap_files bool‐
81 ean. Enabled by default.
82 setsebool -P domain_can_mmap_files 1
84 If you want to allow all domains write to kmsg_device, while kernel is
88 executed with systemd.log_target=kmsg parameter, you must turn on the
89 domain_can_write_kmsg boolean. Disabled by default.
90 setsebool -P domain_can_write_kmsg 1
92 If you want to allow all domains to use other domains file descriptors,
96 you must turn on the domain_fd_use boolean. Enabled by default.
97 setsebool -P domain_fd_use 1
99 If you want to allow all domains to have the kernel load modules, you
103 must turn on the domain_kernel_load_modules boolean. Disabled by
104 default.
105 setsebool -P domain_kernel_load_modules 1
107 If you want to allow all domains to execute in fips_mode, you must turn
111 on the fips_mode boolean. Enabled by default.
112 setsebool -P fips_mode 1
114 If you want to enable reading of urandom for all domains, you must turn
118 on the global_ssp boolean. Disabled by default.
119 setsebool -P global_ssp 1
121 If you want to control the ability to mmap a low area of the address
125 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
126 the mmap_low_allowed boolean. Disabled by default.
127 setsebool -P mmap_low_allowed 1
129 If you want to disable kernel module loading, you must turn on the
133 secure_mode_insmod boolean. Enabled by default.
134 setsebool -P secure_mode_insmod 1
136 If you want to boolean to determine whether the system permits loading
140 policy, setting enforcing mode, and changing boolean values. Set this
141 to true and you have to reboot to set it back, you must turn on the
142 secure_mode_policyload boolean. Enabled by default.
143 setsebool -P secure_mode_policyload 1
145 If you want to allow unconfined executables to make their heap memory
149 executable. Doing this is a really bad idea. Probably indicates a
150 badly coded executable, but could indicate an attack. This executable
151 should be reported in bugzilla, you must turn on the selin‐
152 uxuser_execheap boolean. Disabled by default.
153 setsebool -P selinuxuser_execheap 1
155 If you want to allow all unconfined executables to use libraries
159 requiring text relocation that are not labeled textrel_shlib_t, you
160 must turn on the selinuxuser_execmod boolean. Enabled by default.
161 setsebool -P selinuxuser_execmod 1
163 If you want to allow unconfined executables to make their stack exe‐
167 cutable. This should never, ever be necessary. Probably indicates a
168 badly coded executable, but could indicate an attack. This executable
169 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
170 stack boolean. Enabled by default.
171 setsebool -P selinuxuser_execstack 1
173 If you want to support X userspace object manager, you must turn on the
177 xserver_object_manager boolean. Enabled by default.
178 setsebool -P xserver_object_manager 1
180
184 The SELinux process type unconfined_sendmail_t can manage files labeled
185 with the following file types. The paths listed are the default paths
186 for these file types. Note the processes UID still need to have DAC
187 permissions.
188 file_type
190 all files on the system
192
195 semanage fcontext can also be used to manipulate default file context
196 mappings.
197 semanage permissive can also be used to manipulate whether or not a
199 process type is permissive.
200 semanage module can also be used to enable/disable/install/remove pol‐
202 icy modules.
203 semanage boolean can also be used to manipulate the booleans
205 system-config-selinux is a GUI tool available to customize SELinux pol‐
208 icy settings.
209
212 This manual page was auto-generated using sepolicy manpage .
213
216 selinux(8), unconfined_sendmail(8), semanage(8), restorecon(8),
217 chcon(1), sepolicy(8) , setsebool(8)
218unconfined_sendmail 19-04-25 unconfined_sendmail_selinux(8)