After the initial handshake, once the TK has been installed, all frames
coming from the AP should be encrypted. However, it seems that some
kernel/driver combinations allow unencrypted EAPoL frames to be received
and forwarded to userspace. This can lead to a denial-of-service attack
where receipt of an invalid, unencrypted EAP-Failure frame generated by
an adversary results in iwd terminating an ongoing connection.
Some drivers can report whether the EAPoL frame has been received
unencrypted. Use this information to drop unencrypted EAP frames
received after the initial handshake has been completed.
Reported-by: Domien Schepers <schepers.d@northeastern.edu>
After the initial handshake, once the TK has been installed, all frames
coming from the AP should be encrypted. However, it seems that some
kernel/driver combinations allow unencrypted EAPoL frames to be received
and forwarded to userspace. This can lead to a denial-of-service attack
where receipt of an invalid, unencrypted EAPoL 1/4 frame generated by an
adversary results in iwd terminating an ongoing connection.
Some drivers can report whether the EAPoL frame has been received
unencrypted. Use this information to drop unencrypted PTK 1/4 frames
received after the initial handshake has been completed.
Reported-by: Domien Schepers <schepers.d@northeastern.edu>
Do not fail an ongoing handshake when an invalid EAPoL frame is
received. Instead, follow the intent of 802.11-2020 section 12.7.2:
"EAPOL-Key frames containing invalid field values shall be silently
discarded."
This prevents a denial-of-service attack where receipt of an invalid,
unencrypted EAPoL 1/4 frame generated by an adversary results in iwd
terminating an ongoing connection.
Reported-by: Domien Schepers <schepers.d@northeastern.edu>
Periodic scan requests are meant to be performed with a lower priority
than normal scan requests. They're thus given a different priority when
inserting them into the wiphy work queue. Unfortunately, the priority
is not taken into account when they are inserted into the
sr->requests queue. This can result in the scanning code being confused
since it assumes the top of the queue is always the next scheduled or
currently ongoing scan. As a result any further wiphy_work might never be
started properly.
Apr 27 16:34:40 iwd[5117]: ../iwd-1.26/src/wiphy.c:wiphy_radio_work_insert() Inserting work item 3
Apr 27 16:34:40 iwd[5117]: ../iwd-1.26/src/wiphy.c:wiphy_radio_work_next() Starting work item 3
Apr 27 16:34:40 iwd[5117]: ../iwd-1.26/src/scan.c:scan_periodic_timeout() 1
Apr 27 16:34:40 iwd[5117]: ../iwd-1.26/src/wiphy.c:wiphy_radio_work_insert() Inserting work item 4
Apr 27 16:34:43 iwd[5117]: ../iwd-1.26/src/wiphy.c:wiphy_radio_work_insert() Inserting work item 5
Apr 27 16:34:43 iwd[5117]: ../iwd-1.26/src/wiphy.c:wiphy_radio_work_done() Work item 3 done
Apr 27 16:34:43 iwd[5117]: ../iwd-1.26/src/wiphy.c:wiphy_radio_work_next() Starting work item 5
Apr 27 16:34:43 iwd[5117]: ../iwd-1.26/src/scan.c:scan_notify() Scan notification Trigger Scan(33)
Apr 27 16:34:43 iwd[5117]: ../iwd-1.26/src/scan.c:scan_request_triggered() Passive scan triggered for wdev 1
Apr 27 16:34:43 iwd[5117]: ../iwd-1.26/src/scan.c:scan_periodic_triggered() Periodic scan triggered for wdev 1
In the above log, scan request 5 (triggered by dbus) is started before
scan request 4 (periodic scan). Yet the scanning code thinks scan
request 4 was triggered.
Fix this by using the wiphy_work priority to sort the sr->requests queue
so that the scans are ordered in the same manner.
Reported-by: Alvin Šipraga <ALSI@bang-olufsen.dk>
update_config=1 lets wpa_supplicant write config changes
to the config file. In the real world this is what you want
so your DPP credentials are persistant. But for testing this
is not correct since multiple tests use the same config file
and expect it to be pristine.
Occationally wpa_supplicant was connecting to the AP without
running DPP because the config already had the network
credentials.
The upstream code immediately retransmitted any no-ACK frames.
This would work in cases where the peer wasn't actively switching
channels (e.g. the ACK was simply lost) but caused unintended
behavior in the case of a channel switch when the peer was not
listening.
If either IWD or the peer needed to switch channels based on the
authenticate request the response may end up not getting ACKed
because the peer is idle, or in the middle of the hardware changing
channels. IWD would get no-ACK and immediately send the frame again
and most likely the same behavior would result. This would very
quickly increment frame_retry past the maximum and DPP would fail.
Instead when no ACK is received wait 1 second before sending out
the next frame. This can re-use the existing frame_pending buffer
and the same logic for re-transmitting.
There is a potential corner case of an offchannel frame callback
being called after ROC has ended.
This could happen in theory if a received frame is queued right as
the ROC session expires. If the ROC cancel event makes it to user
space before the frame IWD will schedule another ROC then receive
the frame. This doesn't prevent IWD from sending out another
frame since OFFCHANNEL_TX_OK is used, but it will prevent IWD from
receiving a response frame since no dwell duration is used with DPP.
To handle this an roc_started bool was added to the dpp_sm which
tracks the ROC state. If dpp_send_frame is called when roc_started
is false the frame will be saved and sent out once the ROC session
is started again.
ConnectHiddenNetwork creates a temporary network object and initiates a
connection with it. If the connection fails (due to an incorrect
passphrase or other reasons), then this temporary object is destroyed.
Delay its destruction until network_disconnected() since
network_connect_failed is called too early. Also, re-order the sequence
in station_reset_connection_state() in order to avoid using the network
object after it has been freed by network_disconnected().
Fixes: 85d9d6461f ("network: Hide hidden networks on connection error")
station_hide_network will remove and free the network object, so calling
network_close_settings will result in a crash. Make sure this is done
prior to network object's destruction.
Fixes: 85d9d6461f ("network: Hide hidden networks on connection error")
This only posed a problem oddly if the kernel binary was in the same
directory as test-runner. Resolving the absolute path with the
argument parser resolves the issue.
The TIOCSTTY ioctl was not shared between UML and QEMU which prevented
any console input from making it into UML. This fixes that, and now
ctrl-c can be used to stop UML test execution.
The MountInfo tuple was changed to explicitly take a source string. This
is redundant for UML and system mounts since the fstype/source are the same,
but it allows QEMU to specify the '9p' fstype and use MountInfo rather than
calling mount() explicitly.
This also moves logging cleanup into _prepare_mounts so both UML and QEMU
can use it.
Many processes are not long running (e.g. hostapd_cli, ip, iw, etc)
and the separators written to log files don't show up for these which
makes debugging difficult. This is even true for IWD/Hostapd for tests
with start_iwd=0.
After writing separators for long running processes write them out for
any additional log files too.
Way too many classes have a dependency on the TestContext class, in
most cases only for is_verbose. This patch removes the dependency from
Process and Namespace classes.
For Process, the test arguments can be parsed in the class itself which
will allow for this class to be completely isolated into its own file.
The Namespace class was already relatively isolated. Both were moved
into utils.py which makes 'run-tests' quite a bit nicer to look at and
more fitting to its name.
This commonizes some mounting code between QEMU and UML to allow exporting
of files to the host environment. UML does this with a hostfs mount while
QEMU still uses 9p.
The common code sanitizing the inputs has been put into _prepare_outfiles
and _prepare_mounts was modified to take an 'extra' arugment containing
additional mount points.
The results and monitor parent directories are now passed into the environment
via arguments, and these are hidden from the help text (in addition to testhome)
If --help or unknown options were supplied to test-runner python
would thrown a maximum recusion depth exception. This was due to
the way ArgumentParser was subclassed.
To fix this call ArgumentParser.__init__() rather than using the
super() method. And do this also for the RunnerCoreArgParse
subclass as well. In addition the namespace argument was removed
from parse_args since its not used, and instead supplied directly
to the parents parse_args method.
There is really no reason to have hwsim create interfaces automatically
for test-runner. test-runner already does this for wpa_supplicant and
hostapd, and IWD can create the interface itself.
If a user connection fails on a freshly scanned psk or open hidden
network, during passphrase request or after, it shall be removed from
the network list. Otherwise, it would be possible to directly connect
to that known network, which will appear as not hidden.
The test was rekeying in a loop which ends up confusing hostapd
depending on the timing of when it gets the REKEY command and any
responses from IWD. UML seemed to handle this fine but not QEMU.
Instead delay the rekey a bit to allow it to fully complete before
sending another.
Similarly to hostapd.wait_for_event, IWD's variant needed to act on
an IO watch because events were being received prior to even calling
wait_for_event.
With how fast UML is hostapd events were being sent out prior to
ever calling wait_for_event. Instead set an IO watch on the control
socket and cache all events as they come. Then, when wait_for_event
is called, it can reference this list. If the event is found any
older events are purged from the list.
The AP-ENABLED event needed a special case because hostapd gets
started before the IO watch can be registered. To fix this an
enabled property was added which queries the state directly. This
is checked first, and if not enabled wait_for_event continues normally.
This removes prints which were never supposed to make it upstream as
well as changes sleep() to wd.wait() as well as increase the wait
period to fix issues with how fast UML runs the tests.
