This currently supports automatic decapsulation of GTP-U packets on
UDP port 2152.
The GTPv1 headers for such tunnels can be inspected by handling the
"gtpv1_g_pdu_packet" event, which has a parameter of type "gtpv1_hdr".
Analyzer and test cases are derived from submissions by Carsten Langer.
Addresses #690.
In addition to checking for a finished SSL handshake over an FTP
connection, it now also requires that the SSL handshake occurs after
the FTP client requested AUTH GSSAPI, more specifically identifying the
characteristics of GridFTP control channels.
Addresses #891.
* origin/topic/jsiwek/gridftp:
Add memory leak unit test for GridFTP.
Enable GridFTP detection by default. Track/log SSL client certs.
Add analyzer for GSI mechanism of GSSAPI FTP AUTH method.
Add an example of a GridFTP data channel detection script.
more cases.
It will now not only fire after table-reads have been completed,
but also after the last event of a whole-file-read (or whole-db-read, etc.).
The interface also has been extended a bit to allow readers to
directly fire the event should they so choose. This allows the
event to be fired in direct table-setting/event-sending modes,
which was previously not possible.
In the *service* field of connection records, GridFTP control channels
are labeled as "gridftp" and data channels as "gridftp-data".
Added *client_subject* and *client_issuer_subject* as &log'd fields to
SSL::Info record. Also added *client_cert* and *client_cert_chain*
fields to track client cert chain.
GSI authentication involves an encoded TLS/SSL handshake over the FTP
control session. Decoding the exchanged tokens and passing them to an
SSL analyzer instance allows use of all the familiar script-layer events
in inspecting the handshake (e.g. client/server certificats are
available). For FTP sessions that attempt GSI authentication, the
service field of the connection record will have both "ftp" and "ssl".
One additional change is an FTP server's acceptance of an AUTH request
no longer causes analysis of the connection to cease (because further
analysis likely wasn't possible). This decision can be made more
dynamically at the script-layer (plus there's now the fact that further
analysis can be done at least on the GSSAPI AUTH method).
This could, for example, result in duplicate emails being sent (one from
manager and one from worker) if Notice::emailed_types is redef'd in
local.bro (or any script that gets loaded on all cluster nodes).
The problem was that Notice::policy is used to populate the internal
Notice::ordered_policy vector in a priority 10 bro_init handler (in
scripts/base/frameworks/notice/main.bro) and then that is what is used
when applying policy to notices. In order for
scripts/base/frameworks/notice/cluster.bro to prevent Notice::policy
from being used on non-manager nodes, it needs to clear it in a
bro_init hander of higher priority than 10.
- Intel data distribution on clusters is now pushed in whole
by the manager when a worker connects. Additions after that point
are managed by the normal single-item distribution mechanism already
built into the intelligence framework.
- The manager maintains the complete "minimal" data store that the
workers use to do their matching so that full "minimal" data
distribution is very easy.
- Tests are cleaned up and work.
This option indicates that the Teredo analyzer should wait until
it sees both sides of a connection using a valid Teredo encapsulation
before issuing a protocol_confirmation. Previous behavior confirmed
on the first instance of a valid encapsulation, which could result
in more false positives (and e.g. bogus entries in known-services.log).
Addresses #890.
It relies on the heuristics of GridFTP data channels commonly default to
SSL mutual authentication with a NULL bulk cipher and that they usually
transfer large datasets (default threshold of script is 1 GB). The
script also defaults to skip_further_processing() after detection to try
to save cycles analyzing the large, benign connection.
Also added a script in base/protocols/conn/polling that generalizes the
process of polling a connection for interesting features. The GridFTP
data channel detection script depends on it to monitor bytes
transferred.
- Basic API seems to works, but tests aren't updated yet.
- Several scripts are available in policy/frameworks/intel that
call the "seen" function to provide data into the intel
framework to be tested.
- Intel::policy is not done yet and needs to be discussed to
figure out what it needs to have.
- Running the intel framework and having it do something finally
is really cool!
Since the millisecond resolution cannot be harnessed universally and is not
supported by older version of libcurl, we will allow only specifications at the
granularity of seconds.
This commit also fixes a typing issue that causes that prevented the
ElasticSearch timeout to work in the first place: curl_easy_setopt requires a
long but was given a uint64_t.
Authentication Headers with a Payload Len field set to zero would cause
a crash due to invalid memory allocation because the previous code
assumed Payload Len would always be great enough to contain all
mandatory fields of the header. This changes it so the length of
the header is explicitly checked before attempting to extract fields
located past the minimum length (8 bytes) of an Authentication Header.
Crashes due to this are only possible when handling script-layer events
ipv6_ext_headers, new_packet, esp_packet, or teredo_*. Or also when
implementing one of the discarder_check_* family of functions.
Otherwise, Bro correctly parses past such a header.
- Renamed many data structures to align with most recent standard.
- Reworked modbus events to make them more canonically "Bro".
- Converted the Modbus analyzer to a simpler style for easier maintenance.
- Modbus coil related events still don't work (I haven't finished the
function for converting the data structures).
- Modbus file record events remain incomplete.
* origin/topic/dina/modbus:
put some make-up on Modbus analyser
Modbus analyser, added support: FC=20,21
Modbus analyzer,added support: FC=1,2,15,24
Modbus analyzer, current support: FC=3,4,5,6,7,16,22,23
I cleaned up the code a bit, mainly layout style.
I did not include the *.bro scripts for now, but a test script
../testing/btest/scripts/base/protocols/modbus/events.bro that prints
out the value for each event.
Merged the Modbus traces from the ics repository into a single trace
as input for the test. They currently trigger 20 of the 34 events.
Addresses #870.
* origin/topic/bernhard/input-allow_invalid_types:
to be sure - add a small assertion
add an option to the input framework that allows the user to chose to not die upon encountering files/functions.
That's the last feature for 2.1!
