1systemd_coredump_selinux(S8E)Linux Policy systemd_coredsuymsptemd_coredump_selinux(8)
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6 systemd_coredump_selinux - Security Enhanced Linux Policy for the sys‐
7 temd_coredump processes
8
10 Security-Enhanced Linux secures the systemd_coredump processes via
11 flexible mandatory access control.
12 The systemd_coredump processes execute with the systemd_coredump_t
14 SELinux type. You can check if you have these processes running by exe‐
15 cuting the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep systemd_coredump_t
20
24 The systemd_coredump_t SELinux type can be entered via the sys‐
25 temd_coredump_exec_t file type.
26 The default entrypoint paths for the systemd_coredump_t domain are the
28 following:
29 /bin/systemd-coredump, /usr/lib/systemd/systemd-coredump
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33 SELinux defines process types (domains) for each process running on the
34 system
35 You can see the context of a process using the -Z option to ps
37 Policy governs the access confined processes have to files. SELinux
39 systemd_coredump policy is very flexible allowing users to setup their
40 systemd_coredump processes in as secure a method as possible.
41 The following process types are defined for systemd_coredump:
43 systemd_coredump_t
45 Note: semanage permissive -a systemd_coredump_t can be used to make the
47 process type systemd_coredump_t permissive. SELinux does not deny
48 access to permissive process types, but the AVC (SELinux denials) mes‐
49 sages are still generated.
50
53 SELinux policy is customizable based on least access required. sys‐
54 temd_coredump policy is extremely flexible and has several booleans
55 that allow you to manipulate the policy and run systemd_coredump with
56 the tightest access possible.
57 If you want to allow users to resolve user passwd entries directly from
61 ldap rather then using a sssd server, you must turn on the authlo‐
62 gin_nsswitch_use_ldap boolean. Disabled by default.
63 setsebool -P authlogin_nsswitch_use_ldap 1
65 If you want to deny user domains applications to map a memory region as
69 both executable and writable, this is dangerous and the executable
70 should be reported in bugzilla, you must turn on the deny_execmem bool‐
71 ean. Enabled by default.
72 setsebool -P deny_execmem 1
74 If you want to allow all domains to execute in fips_mode, you must turn
78 on the fips_mode boolean. Enabled by default.
79 setsebool -P fips_mode 1
81 If you want to allow confined applications to run with kerberos, you
85 must turn on the kerberos_enabled boolean. Enabled by default.
86 setsebool -P kerberos_enabled 1
88 If you want to control the ability to mmap a low area of the address
92 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
93 the mmap_low_allowed boolean. Disabled by default.
94 setsebool -P mmap_low_allowed 1
96 If you want to allow system to run with NIS, you must turn on the
100 nis_enabled boolean. Disabled by default.
101 setsebool -P nis_enabled 1
103 If you want to allow confined applications to use nscd shared memory,
107 you must turn on the nscd_use_shm boolean. Disabled by default.
108 setsebool -P nscd_use_shm 1
110 If you want to disable kernel module loading, you must turn on the
114 secure_mode_insmod boolean. Enabled by default.
115 setsebool -P secure_mode_insmod 1
117 If you want to allow unconfined executables to make their heap memory
121 executable. Doing this is a really bad idea. Probably indicates a
122 badly coded executable, but could indicate an attack. This executable
123 should be reported in bugzilla, you must turn on the selin‐
124 uxuser_execheap boolean. Disabled by default.
125 setsebool -P selinuxuser_execheap 1
127 If you want to allow unconfined executables to make their stack exe‐
131 cutable. This should never, ever be necessary. Probably indicates a
132 badly coded executable, but could indicate an attack. This executable
133 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
134 stack boolean. Enabled by default.
135 setsebool -P selinuxuser_execstack 1
137
141 The SELinux process type systemd_coredump_t can manage files labeled
142 with the following file types. The paths listed are the default paths
143 for these file types. Note the processes UID still need to have DAC
144 permissions.
145 file_type
147 all files on the system
149
152 SELinux requires files to have an extended attribute to define the file
153 type.
154 You can see the context of a file using the -Z option to ls
156 Policy governs the access confined processes have to these files.
158 SELinux systemd_coredump policy is very flexible allowing users to set‐
159 up their systemd_coredump processes in as secure a method as possible.
160 STANDARD FILE CONTEXT
162 SELinux defines the file context types for the systemd_coredump, if you
164 wanted to store files with these types in a diffent paths, you need to
165 execute the semanage command to sepecify alternate labeling and then
166 use restorecon to put the labels on disk.
167 semanage fcontext -a -t systemd_coredump_tmpfs_t '/srv/mysystemd_core‐
169 dump_content(/.*)?'
170 restorecon -R -v /srv/mysystemd_coredump_content
171 Note: SELinux often uses regular expressions to specify labels that
173 match multiple files.
174 The following file types are defined for systemd_coredump:
176 systemd_coredump_exec_t
180 - Set files with the systemd_coredump_exec_t type, if you want to tran‐
182 sition an executable to the systemd_coredump_t domain.
183 Paths:
186 /bin/systemd-coredump, /usr/lib/systemd/systemd-coredump
187 systemd_coredump_tmpfs_t
190 - Set files with the systemd_coredump_tmpfs_t type, if you want to
192 store systemd coredump files on a tmpfs file system.
193 Note: File context can be temporarily modified with the chcon command.
197 If you want to permanently change the file context you need to use the
198 semanage fcontext command. This will modify the SELinux labeling data‐
199 base. You will need to use restorecon to apply the labels.
200
203 semanage fcontext can also be used to manipulate default file context
204 mappings.
205 semanage permissive can also be used to manipulate whether or not a
207 process type is permissive.
208 semanage module can also be used to enable/disable/install/remove pol‐
210 icy modules.
211 semanage boolean can also be used to manipulate the booleans
213 system-config-selinux is a GUI tool available to customize SELinux pol‐
216 icy settings.
217
220 This manual page was auto-generated using sepolicy manpage .
221
224 selinux(8), systemd_coredump(8), semanage(8), restorecon(8), chcon(1),
225 sepolicy(8), setsebool(8)
226systemd_coredump 19-05-30 systemd_coredump_selinux(8)