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Tmux confined users #2399

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merged 2 commits into from
Oct 23, 2024
Merged

Tmux confined users #2399

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2bb4af8
Label /root/.screenrc and /root/.tmux.conf with screen_home_t
zpytela Oct 22, 2024
282e883
Allow confined users r/w to screen unix stream socket
zpytela Oct 22, 2024
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3 changes: 3 additions & 0 deletions policy/modules/contrib/screen.fc
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,9 @@ HOME_DIR/\.screen(/.*)? gen_context(system_u:object_r:screen_home_t,s0)
HOME_DIR/\.screenrc -- gen_context(system_u:object_r:screen_home_t,s0)
HOME_DIR/\.tmux\.conf -- gen_context(system_u:object_r:screen_home_t,s0)

/root/\.screenrc -- gen_context(system_u:object_r:screen_home_t,s0)
/root/\.tmux\.conf -- gen_context(system_u:object_r:screen_home_t,s0)

/root/\.screen(/.*)? gen_context(system_u:object_r:screen_home_t,s0)

/usr/bin/screen -- gen_context(system_u:object_r:screen_exec_t,s0)
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31 changes: 30 additions & 1 deletion policy/modules/contrib/screen.if
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Expand Up @@ -48,7 +48,7 @@ template(`screen_role_template',`

domtrans_pattern($3, screen_exec_t, $1_screen_t)
allow $3 $1_screen_t:process { signal sigchld };
dontaudit $3 $1_screen_t:unix_stream_socket { ioctl read write };
allow $3 $1_screen_t:unix_stream_socket { ioctl read write };
allow $1_screen_t $3:unix_stream_socket { connectto };
allow $1_screen_t $3:process signal;
allow $3 screen_exec_t:file entrypoint;
Expand Down Expand Up @@ -99,6 +99,35 @@ template(`screen_role_template',`
')
')

#######################################
## <summary>
## The admin role template for the screen module
## </summary>
## <param name="role_prefix">
## <summary>
## The prefix of the user role (e.g., user
## is the prefix for user_r).
## </summary>
## </param>
## <param name="user_role">
## <summary>
## The role associated with the user domain.
## </summary>
## </param>
## <param name="user_domain">
## <summary>
## The type of the user domain.
## </summary>
## </param>
#
template(`screen_admin_role_template',`
screen_role_template($1, $2, $3)

userdom_admin_home_dir_filetrans($1_screen_t, screen_home_t, file, ".screenrc")
userdom_admin_home_dir_filetrans($1_screen_t, screen_home_t, file, ".tmux.conf")
')


#######################################
## <summary>
## Execute the rssh program
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2 changes: 1 addition & 1 deletion policy/modules/roles/auditadm.te
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Expand Up @@ -48,7 +48,7 @@ optional_policy(`
')

optional_policy(`
screen_role_template(auditadm, auditadm_r, auditadm_t)
screen_admin_role_template(auditadm, auditadm_r, auditadm_t)
')

optional_policy(`
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2 changes: 1 addition & 1 deletion policy/modules/roles/secadm.te
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Expand Up @@ -63,7 +63,7 @@ optional_policy(`
')

optional_policy(`
screen_role_template(secadm, secadm_r, secadm_t)
screen_admin_role_template(secadm, secadm_r, secadm_t)
')

optional_policy(`
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2 changes: 1 addition & 1 deletion policy/modules/roles/sysadm.te
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Expand Up @@ -561,7 +561,7 @@ optional_policy(`
')

optional_policy(`
screen_role_template(sysadm, sysadm_r, sysadm_t)
screen_admin_role_template(sysadm, sysadm_r, sysadm_t)
allow sysadm_screen_t self:capability { dac_read_search dac_override chown };
')

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