171 lines
4.8 KiB
Plaintext
171 lines
4.8 KiB
Plaintext
policy_module(domain, 1.11.0)
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########################################
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#
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# Declarations
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#
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## <desc>
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## <p>
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## Control the ability to mmap a low area of the address space,
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## as configured by /proc/sys/kernel/mmap_min_addr.
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## </p>
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## </desc>
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gen_tunable(mmap_low_allowed, false)
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# Mark process types as domains
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attribute domain;
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# Transitions only allowed from domains to other domains
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neverallow domain ~domain:process { transition dyntransition };
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# Domains that are unconfined
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attribute unconfined_domain_type;
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# Domains that can mmap low memory.
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attribute mmap_low_domain_type;
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neverallow { domain -mmap_low_domain_type } self:memprotect mmap_zero;
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# Domains that can set their current context
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# (perform dynamic transitions)
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attribute set_curr_context;
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# enabling setcurrent breaks process tranquility. If you do not
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# know what this means or do not understand the implications of a
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# dynamic transition, you should not be using it!!!
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neverallow { domain -set_curr_context } self:process setcurrent;
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# entrypoint executables
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attribute entry_type;
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# widely-inheritable file descriptors
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attribute privfd;
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#
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# constraint related attributes
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#
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# [1] types that can change SELinux identity on transition
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attribute can_change_process_identity;
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# [2] types that can change SELinux role on transition
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attribute can_change_process_role;
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# [3] types that can change the SELinux identity on a filesystem
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# object or a socket object on a create or relabel
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attribute can_change_object_identity;
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# [3] types that can change to system_u:system_r
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attribute can_system_change;
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# [4] types that have attribute 1 can change the SELinux
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# identity only if the target domain has this attribute.
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# Types that have attribute 2 can change the SELinux role
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# only if the target domain has this attribute.
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attribute process_user_target;
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# For cron jobs
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# [5] types used for cron daemons
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attribute cron_source_domain;
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# [6] types used for cron jobs
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attribute cron_job_domain;
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# [7] types that are unconditionally exempt from
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# SELinux identity and role change constraints
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attribute process_uncond_exempt; # add userhelperdomain to this one
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neverallow { domain unlabeled_t } ~{ domain unlabeled_t }:process *;
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neverallow ~{ domain unlabeled_t } *:process *;
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########################################
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#
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# Rules applied to all domains
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#
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# read /proc/(pid|self) entries
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allow domain self:dir list_dir_perms;
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allow domain self:lnk_file { read_lnk_file_perms lock ioctl };
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allow domain self:file rw_file_perms;
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kernel_read_proc_symlinks(domain)
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# Every domain gets the key ring, so we should default
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# to no one allowed to look at it; afs kernel support creates
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# a keyring
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kernel_dontaudit_search_key(domain)
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kernel_dontaudit_link_key(domain)
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# create child processes in the domain
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allow domain self:process { fork sigchld };
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# Use trusted objects in /dev
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dev_rw_null(domain)
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dev_rw_zero(domain)
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term_use_controlling_term(domain)
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# list the root directory
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files_list_root(domain)
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ifdef(`hide_broken_symptoms',`
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# This check is in the general socket
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# listen code, before protocol-specific
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# listen function is called, so bad calls
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# to listen on UDP sockets should be silenced
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dontaudit domain self:udp_socket listen;
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')
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tunable_policy(`global_ssp',`
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# enable reading of urandom for all domains:
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# this should be enabled when all programs
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# are compiled with ProPolice/SSP
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# stack smashing protection.
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dev_read_urand(domain)
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')
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optional_policy(`
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libs_use_ld_so(domain)
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libs_use_shared_libs(domain)
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')
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optional_policy(`
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setrans_translate_context(domain)
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')
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# xdm passes an open file descriptor to xsession-errors.log which is then audited by all confined domains.
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optional_policy(`
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xserver_dontaudit_use_xdm_fds(domain)
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xserver_dontaudit_rw_xdm_pipes(domain)
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')
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########################################
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#
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# Unconfined access to this module
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#
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# unconfined access also allows constraints, but this
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# is handled in the interface as typeattribute cannot
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# be used on an attribute.
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# Use/sendto/connectto sockets created by any domain.
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allow unconfined_domain_type domain:{ socket_class_set socket key_socket } *;
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# Use descriptors and pipes created by any domain.
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allow unconfined_domain_type domain:fd use;
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allow unconfined_domain_type domain:fifo_file rw_file_perms;
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# Act upon any other process.
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allow unconfined_domain_type domain:process ~{ transition dyntransition execmem execstack execheap };
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# Create/access any System V IPC objects.
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allow unconfined_domain_type domain:{ sem msgq shm } *;
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allow unconfined_domain_type domain:msg { send receive };
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# For /proc/pid
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allow unconfined_domain_type domain:dir list_dir_perms;
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allow unconfined_domain_type domain:file rw_file_perms;
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allow unconfined_domain_type domain:lnk_file { read_lnk_file_perms ioctl lock };
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# act on all domains keys
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allow unconfined_domain_type domain:key *;
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# receive from all domains over labeled networking
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domain_all_recvfrom_all_domains(unconfined_domain_type)
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