* origin/topic/bernhard/ssl-analyzer:
Fix a few failing tests
Add very basic ocsp stapling support.
Add documentation, consts and tests for the new events.
Support parsing of several TLS extensions.
Make SSL/TLS version detection less brittle.
Nicer notices for heartbleed.
rip out state handline from ssl analyzer.
enable detection of encrypted heartbleeds.
also extract payload data in ssl_heartbeat
add to local.bro, add disclaimer
make tls heartbeat messages a bit better.
fix tabs.
polish script and probably detect encrypted attacks too.
detect and alert on simple case of heartbleed
default to TLS when not being able to determine version
add is_orig to heartbeat event
Throw new event for heartbeat messages.
BIT-1178 #merged
* origin/topic/jsiwek/faf-perf:
Adapt HTTP partial content to cache file analysis IDs.
Adapt SSL analyzer to generate file analysis handles itself.
Adapt more of HTTP analyzer to use cached file analysis IDs.
Adapt IRC/FTP analyzers to cache file analysis IDs.
Refactor regex/signature AcceptingSet data structure and usages.
Enforce data size limit when checking files for MIME matches.
Refactor file analysis file ID lookup.
The "dns_TXT_reply" event now uses a "vector of strings" as the final
parameter instead of just a "string" in order to support DNS TXT
resource records that contain multiple character-strings.
The format in which the TXT answers are logged by default is now changed
to be a list of strings of the form `fmt("TXT %d %s", |str|, str)`, one
for each character-string in the RR and delimited by a space (' ')
character.
This also fixes the heartbleed detector to work for encrypted attacks in this
branch again. It stopped working, because the SSL analyzer now successfully detects
established connections, and the scripts usually disable analyzing after that.
(The heartbeat branch should not have been affected)
The initial file ID I think is still ambiguous and/or depends on
script-layer state tracking enough that it still needs to request a file
ID via an event at first, but once that is assigned to an HTTP (MIME)
entity, it never makes sense that it can change (so re-using a cached ID
works).
At the moment, we have support for:
elliptic_curves: client supported elliptic curves
ec_point_formats: list of client supported EC point formats
application_layer_protocol_negotiation: list of supported application layer protocols (used for spdy/http2 negotiation)
server_name: server name sent by client. This was supported before, but... a bit brittle.
The value of *bof_buffer_size* in the *fa_file* record was supposed to
always limit the amount of data used by the signature matching engine,
but some corner cases would cause matching to be performed on data
beyond that.
This still cannot deal with v2 hellos that use the long length.
On the other hand - OpenSSL also cannot deal with these and we should
not see many sslv2 connections in any case - so... they probably
would not work in practice in any case.
This prevents the worker nodes from crashing, when request_key is used
in cluster mode and called on the worker and the manager nodes (i.e. when
a non-cluster-aware script is used).
Addresses BIT-1177
Setting the thread name on every heartbeat uses a mild amount of
cycles and there's not much benefit to doing it there to get the
additional info regarding the number of processed messages since thread
names usually get truncated to 16 characters and omit that part anyway.
IP addresses are often seen in the HTTP host field; this change checks if the value in the host field is a valid IP address and processes the Intel::seen event to check for an Intel::ADDR indicator.
This patch fixes a bug that occurred when calling the BiF bloomfilter_clear,
which used to not only clear the underlying bit vector but also set its size to
zero. As a result, subsequent element access or computations using the bit
vector size caused erroneous behavior.
Reported by @colonelxc.
