selinux-refpolicy/policy
Nicolas Iooss 1097ce0e24
sudo: allow using CAP_KILL for SIGWINCH
With the following process tree:

    LABEL                           UID    PID  PPID  TTY   CMD
    sysadm_u:sysadm_r:sysadm_t      root  18146 12404 pts/0 /usr/bin/zsh
    sysadm_u:sysadm_r:sysadm_sudo_t root  18441 18146 pts/0 sudo -su user
    sysadm_u:sysadm_r:sysadm_sudo_t root  18443 18441 pts/1 sudo -su user
    sysadm_u:sysadm_r:sysadm_t      user  18444 18443 pts/1 /usr/bin/zsh

When the terminal window of the first process is resized, SIGWINCH is
forwarded by process 18443, which requests capability CAP_KILL:

    type=AVC msg=audit(1567881640.754:13839): avc:  denied  { kill } for
    pid=18443 comm="sudo" capability=5
    scontext=sysadm_u:sysadm_r:sysadm_sudo_t
    tcontext=sysadm_u:sysadm_r:sysadm_sudo_t tclass=capability
    permissive=0

    type=SYSCALL msg=audit(1567881640.754:13839): arch=c000003e
    syscall=62 success=no exit=-1 a0=ffffb7f4 a1=1c a2=ffffffff a3=100
    items=0 ppid=18441 pid=18443 auid=1000 uid=0 gid=1000 euid=0 suid=0
    fsuid=0 egid=1000 sgid=1000 fsgid=1000 tty=pts1 ses=690 comm="sudo"
    exe="/usr/bin/sudo" subj=sysadm_u:sysadm_r:sysadm_sudo_t key=(null)

    type=PROCTITLE msg=audit(1567881640.754:13839):
    proctitle=7375646F002D73750075736572

Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
2019-09-14 14:00:58 +02:00
..
flask Remove incorrect comment about capability2:mac_admin. 2019-03-11 20:49:42 -04:00
modules sudo: allow using CAP_KILL for SIGWINCH 2019-09-14 14:00:58 +02:00
support obj_perm_sets.spt: Add xdp_socket to socket_class_set. 2018-10-23 17:18:43 -04:00
constraints refpolicy: Update for kernel sctp support 2018-03-21 14:14:37 -04:00
context_defaults
global_booleans
global_tunables
mcs refpolicy: Update for kernel sctp support 2018-03-21 14:14:37 -04:00
mls Remove unused translate permission in context userspace class. 2018-10-13 13:39:18 -04:00
policy_capabilities
users