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Sanitize power level checks

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This commit is contained in:
Erik Johnston 2015-07-10 13:42:24 +01:00
parent 7e3b14fe78
commit a5ea22d468
1 changed files with 21 additions and 15 deletions
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36
synapse/api/auth.py
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@ -261,12 +261,12 @@ class Auth(object):
elif target_user_id != event.user_id: elif target_user_id != event.user_id:
kick_level = self._get_named_level(auth_events, "kick", 50) kick_level = self._get_named_level(auth_events, "kick", 50)
if user_level < kick_level or user_level < target_level: if user_level < kick_level or user_level <= target_level:
raise AuthError( raise AuthError(
403, "You cannot kick user %s." % target_user_id 403, "You cannot kick user %s." % target_user_id
) )
elif Membership.BAN == membership: elif Membership.BAN == membership:
if user_level < ban_level or user_level < target_level: if user_level < ban_level or user_level <= target_level:
raise AuthError(403, "You don't have permission to ban") raise AuthError(403, "You don't have permission to ban")
else: else:
raise AuthError(500, "Unknown membership %s" % membership) raise AuthError(500, "Unknown membership %s" % membership)
@ -576,25 +576,25 @@ class Auth(object):
# Check other levels: # Check other levels:
levels_to_check = [ levels_to_check = [
("users_default", []), ("users_default", None),
("events_default", []), ("events_default", None),
("ban", []), ("ban", None),
("redact", []), ("redact", None),
("kick", []), ("kick", None),
("invite", []), ("invite", None),
] ]
old_list = current_state.content.get("users") old_list = current_state.content.get("users")
for user in set(old_list.keys() + user_list.keys()): for user in set(old_list.keys() + user_list.keys()):
levels_to_check.append( levels_to_check.append(
(user, ["users"]) (user, "users")
) )
old_list = current_state.content.get("events") old_list = current_state.content.get("events")
new_list = event.content.get("events") new_list = event.content.get("events")
for ev_id in set(old_list.keys() + new_list.keys()): for ev_id in set(old_list.keys() + new_list.keys()):
levels_to_check.append( levels_to_check.append(
(ev_id, ["events"]) (ev_id, "events")
) )
old_state = current_state.content old_state = current_state.content
@ -602,12 +602,10 @@ class Auth(object):
for level_to_check, dir in levels_to_check: for level_to_check, dir in levels_to_check:
old_loc = old_state old_loc = old_state
for d in dir:
old_loc = old_loc.get(d, {})
new_loc = new_state new_loc = new_state
for d in dir: if dir:
new_loc = new_loc.get(d, {}) old_loc = old_loc.get(dir, {})
new_loc = new_loc.get(dir, {})
if level_to_check in old_loc: if level_to_check in old_loc:
old_level = int(old_loc[level_to_check]) old_level = int(old_loc[level_to_check])
@ -623,6 +621,14 @@ class Auth(object):
if new_level == old_level: if new_level == old_level:
continue continue
if dir == "users" and level_to_check != event.user_id:
if old_level == user_level:
raise AuthError(
403,
"You don't have permission to remove ops level equal "
"to your own"
)
if old_level > user_level or new_level > user_level: if old_level > user_level or new_level > user_level:
raise AuthError( raise AuthError(
403, 403,