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set target user groups before setuid'ing #1

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8 changes: 8 additions & 0 deletions daemon/daemon.py
Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,8 @@
import signal
import socket
import atexit
import pwd
import grp


class DaemonError(Exception):
Expand Down Expand Up @@ -514,6 +516,12 @@ def change_process_owner(uid, gid):

"""
try:
user_struct = pwd.getpwuid(uid)
groups = [group_struct.gr_gid
for group_struct in grp.getgrall()
if user_struct.pw_name in group_struct.gr_mem]
groups.append(user_struct.pw_gid)
os.setgroups(groups)
os.setgid(gid)
os.setuid(uid)
except Exception, exc:
Expand Down